40 results on '"Pengyu Deng"'
Search Results
2. Associations of Morphological Changes in Skeletal Muscles of Preschool Children in China Following Physical Activity
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Pengyu Deng, Hayao Ozaki, Toshiharu Natsume, Dandan Ke, Dajiang Lu, Koya Suzuki, and Hisashi Naito
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physical activity ,growth and development ,muscle growth ,skeletal muscle ,Pediatrics ,RJ1-570 - Abstract
Purpose: Physical activity (PA) is likely to be the most important modifiable factor in skeletal muscle development. However, the influence of PA on the skeletal muscle of preschool children has not been thoroughly investigated. The main objective of this study was to quantitatively measure PA, and then, to assess whether associations exist between site-specific muscle changes and PA in relation to sex and weight statuses in preschool children aged 3 to 4 years. Methods: A total of 86 healthy preschool children, aged 3–4 years, were instructed to wear an accelerometer for seven consecutive days. The number of steps taken daily, and minutes spent in moderate–vigorous PA (MVPA) and total PA (TPA) were recorded. Muscle thickness was measured by B-mode ultrasonography using a 5–18 MHz scanning head. Muscle thickness was measured at seven sites: the lateral forearm, upper arm, abdomen, anterior and posterior thigh, and anterior and posterior lower leg. Results: There was no significant difference between boys and girls in terms of MVPA and TPA on weekdays and weekends. According to the linear regression models, after adjusting for daylight duration, the muscle of the posterior thigh was significantly positively associated (p < 0.05) with daily steps and MVPA on weekdays for boys and girls, respectively. Conclusions: We found that the muscle thickness of the posterior thigh in preschool children was significantly positively associated with PA, as measured by daily steps and MVPA. We suggest that for the overall health and well-being of preschool children, the levels of PA should be maintained and/or increased, and preferably transformed into a regular part of daily living.
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- 2023
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3. The fate and behavior of glufosinate-enantiomers and their metabolites in open-field soil and weeds
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Yunfang Li, Fei Wang, Qiao Lin, Pengyu Deng, Yuping Zhang, and Deyu Hu
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Glufosinate Stereoisomers ,Metabolites ,Stereoselective Degradation ,Weed ,Soil ,Chemistry ,QD1-999 - Abstract
In this study, a chiral method based on high performance liquid chromatography–Q-Exactive Orbitrap Mass Spectrometry was developed to determine glufosinate stereoisomers and three metabolites in weed. Fortified recoveries in weed and soil samples were from 78.6 to 94.3 %, with relative standard deviations of less than 9.8 % and fortified values ranging from 0.04 to 40 mg/kg for the glufosinate enantiomers and 0.08–8 mg/kg for three metabolites. When glufosinate was given at the peak of weed growth in three orchards, it was mostly distributed and degraded in the weeds, with little remaining in the soil. The two glufosinate enantiomers degraded rapidly in the weeds and soils, with half-lives ranging from 0.7 to 3.1 days. The degradation of glufosinate enantiomers in Guizhou and Hunan weeds was enantioselective, with l-glufosinate being preferentially degraded. In Hainan weed, the degradation rate of the two enantiomers was nearly the same. In open field soils, glufosinate enantiomers were almost non-enantioselective. 3-methylphosphinico-propionic acid (MPP) was the primary glufosinate metabolite in weeds and soils, accounting for up to 14 % of the parent. N-acetyl-glufosinate (NAG) was relatively low, with less than 1 % of the parent glufosinate metabolized into 2-methylphosphinico-acetic acid (MPA).
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- 2022
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4. Serum albumin levels as a predictive biomarker for low-load resistance training programs’ effects on muscle thickness in the community-dwelling elderly Japanese population: interventional study result
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Shuji Sawada, Hayao Ozaki, Toshiharu Natsume, Daiki Nakano, Pengyu Deng, Toshinori Yoshihara, Takuya Osawa, Hiroyuki Kobayashi, Shuichi Machida, and Hisashi Naito
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Aged ,Resistance training ,Serum albumin ,Muscle hypertrophy ,Geriatrics ,RC952-954.6 - Abstract
Abstract Background Resistance training has been recommended as an effective measure against age-related loss of muscle mass and muscle strength, called sarcopenia, even in older adults. However, despite subjecting each participant to the same training program, the training effect solely depended on the individual. This study aimed to evaluate whether certain blood parameters influenced the effect of a low-load resistance training program on muscle thickness in the community-dwelling elderly population. Methods Sixty-nine community-dwelling Japanese (49 women and 20 men) subjects aged 69.4 ± 6.5 years were included. Low-load resistance training was performed twice a week for 12 weeks. Muscle thickness at the anterior aspects of the thigh (AT) was measured using a B-mode ultrasound device, and 22 blood parameter levels were assessed before and after the program. We checked the first quartile value of each parameter to establish cutoff values, and participants were divided into low or normal groups for each parameter. Results A low-load resistance training program significantly increased muscle thickness at the AT. The interaction between time and groups was examined at low (
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- 2021
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5. Accumulation, metabolites formation and elimination behavior of rac-glufosinate-ammonium and glufosinate-P in zebrafish (Danio rerio)
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Fei Wang, Qiao Lin, Xueqin Shi, Yunfang Li, Pengyu Deng, Yuping Zhang, and Deyu Hu
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Rac-glufosinate-ammonium ,Glufosinate-P ,Degradation ,Bioaccumulation ,Metabolites ,Zebrafish ,Nutrition. Foods and food supply ,TX341-641 ,Food processing and manufacture ,TP368-456 - Abstract
An efficient trace detection method for the determination of residues of the glufosinate enantiomers and metabolites in zebrafish by HPLC–Q-Exactive Orbitrap Mass Spectrometry was developed. After the purification of dichloromethane and Oasis PRiME HLB SPE column, the recovery ranges from 77% to 104%, with RSD
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- 2022
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6. Degradation Dynamics and Residue Analysis of Four Propiconazole Stereoisomers in 'Fengtang' Plum during Storage by LC-MS/MS
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Pengyu Deng, Lianhong Mou, Guipeng Ou, Xin Luo, Deyu Hu, and Yuping Zhang
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propiconazole ,stereoisomers ,stereoselective degradation ,residues ,LC−MS/MS ,“Fengtang” plum ,Chemical technology ,TP1-1185 - Abstract
Herein, an accurate and sensitive method was developed for detecting four stereoisomers of propiconazole in “Fengtang” plum by LC-MS/MS. The mean recovery of four propiconazole stereoisomers ranged from 79.42 to 104.10% at three adding levels with reasonable RSD of 1.54–11.68%, and the LOD and LOQ of the four stereoisomers was 0.0005 mg/kg and 0.004 mg/kg, respectively. In addition, the residue and selective degradation of propiconazole stereoisomers in plums were investigated by storage at 20 °C and 4 °C. The half-lives of propiconazole stereoisomeric during storage were 9.49–15.40 d at 20 °C, and 21.00–28.88 d at 4 °C. The degradation of (2R,4R)-propiconazole and (2R,4S)-propiconazole in stored plums was slightly slower than that of the corresponding enantiomers (2S,4S)-propiconazole and (2S,4R)-propiconazole. The total residues of propiconazole were 0.026–0.487 mg/kg in the plum storage period, and the water washing could remove 49.35% to 54.65% of the propiconazole residue in plum. The hardness of plums treated with propiconazole was generally higher than that of control in the middle and late stages of storage. The effects of propiconazole on the total soluble solid content of plums were different at 20 °C and 4 °C. This study provides a scientific reference for the food safety evaluation of the “Fengtang” plum after the application of propiconazole during the storage period.
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- 2023
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7. The 30-s chair stand test can be a useful tool for screening sarcopenia in elderly Japanese participants
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Shuji Sawada, Hayao Ozaki, Toshiharu Natsume, Pengyu Deng, Toshinori Yoshihara, Takashi Nakagata, Takuya Osawa, Yoshihiko Ishihara, Tomoharu Kitada, Ken Kimura, Nobuhiro Sato, Shuichi Machida, and Hisashi Naito
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Elderly ,Sarcopenia ,Lower limb muscle strength ,Chair stand test ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Low muscle strength has been focused on as an essential characteristic of sarcopenia, and the 30-s chair stand test (CS-30) could be a particularly useful test for assessing muscle strength. While it is speculated to be a beneficial tool for the assessment of sarcopenia, this remains to be verified. In this study, we examined the reliability and optimal diagnostic score of the CS-30 for assessing sarcopenia in elderly Japanese participants. Methods This cross-sectional study included 678 participants (443 females and 235 males) who underwent the test for sarcopenia as per the Asian Working Group for Sarcopenia (AWGS) 2019, the CS-30 test, and the isometric knee-extension muscle strength test. ROC analysis was used to estimate the optimal CS-30 scores at which sarcopenia was detected. Results CS-30 scores were positively associated with sarcopenia (OR: 0.88; 95% CI:0.82–0.93). The AUC of the CS-30 for sarcopenia definition were 0.84 (p
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- 2021
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8. Association between Soccer Participation and Liking or Being Proficient in It: A Survey Study of 38,258 Children and Adolescents in China
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Yibo Gao, Xiang Pan, Huan Wang, Dongming Wu, Pengyu Deng, Lupei Jiang, Aoyu Zhang, Jin He, and Yanfeng Zhang
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influencing factors ,level ,regions ,cross-sectional analysis ,Pediatrics ,RJ1-570 - Abstract
Soccer participation among children and adolescents is low in China. To achieve a coordinated development of soccer in all regions and to promote the physical health of children and adolescents, this study aims to identify the influencing factors regarding the participation of children and adolescents in soccer programs through a cross-sectional analysis of the “soccer population” of children and adolescents. A total of 38,258 children and adolescents aged 7–18 years were included in this study. In addition, the analysis was conducted by dividing the regions where the children and adolescents live into three parts according to socioeconomic status, and by incorporating five dimensions, including environment, family, school, community, and individual levels to find the influencing factors of children and adolescents’ participation in soccer. Chi-square test, Pearson’s correlation, and one-way logistic regression analyses were used. The results showed that the area (r = 0.487) and the average annual precipitation (r = −0.367) were associated with the participation of children and adolescents in soccer programs. Moreover, the percentage of children and adolescents who participated in soccer programs (24.5%) was higher than those who liked soccer or were proficient in it (14.4%). Meanwhile, parental encouragement and support (OR = 0.627; 95% CI, 1.102–3.179), as well as the accessibility (OR = 0.558; 95% CI, 1.418–2.155), availability (OR = 1.419; 95% CI, 1.179–1.707), and safety of sports facilities (OR = 0.316; 95% CI, 0.614–0.865), influence children and adolescents’ participation in soccer programs.
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- 2023
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9. Relationship between Skeletal Muscle Thickness and Physical Activity in 4- to 6-Year-Olds in Japan
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Pengyu Deng, Hayao Ozaki, Toshiharu Natsume, Yoshihiko Ishihara, Dandan Ke, Koya Suzuki, and Hisashi Naito
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accelerometer ,muscle thickness ,growth ,development ,Pediatrics ,RJ1-570 - Abstract
Purpose: Physical activity (PA) is widely recognized as a key factor in promoting skeletal muscle growth, though little is known about the specific impact of PA on the skeletal muscle development of preschool children. The purpose of this study is to investigate whether there is a relationship between PA levels and skeletal muscle thickness in preschoolers. By exploring this relationship, we hope to gain a better understanding of how PA can be used to promote healthy skeletal muscle development in preschoolers. Methods: In this study, a total of 275 healthy Japanese preschoolers, aged 4–6 years, from seven nursery schools in the town of Togo were recruited. Participants were asked to wear an accelerometer for four consecutive days to record their daily steps and the amount of time spent in moderate-to-vigorous PA and t total physical activity. Muscle thickness (MTs) was measured using B-mode ultrasonography at four sites: the anterior and posterior thigh (AT and PT, respectively) and the anterior and posterior lower leg (AL and PL, respectively). Results: On weekdays, boys were found to be more physically active and engaged in significantly higher levels of total physical activity and moderate-to-vigorous PA than girls. Both boys and girls recorded more physical activity, daily steps, and higher levels of total physical activity and MVPA on weekdays compared to weekends. After adjusting for daylight duration, multivariable regression analyses revealed that increased total physical activity and moderate-to-vigorous PA were positively associated with greater muscle thickness size in the anterior tibialis (AT) and posterior lower leg (PL) muscles (β = 1.11 and β = 1.37 for AT, β = 1.18 and β = 0.94 for PL, p < 0.05) in Japanese preschoolers. Conclusions: The time spent involved in most of the different categories of moderate-to-vigorous PA was significantly higher for boys than for girls on the weekdays and weekends. Additionally, there was a positive correlation between time spent in moderate-to-vigorous PA and greater development of skeletal muscle in the lower body.
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- 2023
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10. Assessment of Heavy Metal Uptake in Potatoes Cultivated in a Typical Karst Landform, Weining County, China
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Xueqin Shi, Qiao Lin, Pengyu Deng, Tianyou Feng, and Yuping Zhang
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potatoes ,soil ,heavy metals ,bioconcentration ,correlation ,pollution load index ,Chemical technology ,TP1-1185 - Abstract
The average content of heavy metals in Weining soil of karst landforms is generally higher than that of other agricultural regions. The aim of this study was to evaluate the heavy metal content in potatoes from Weining county and to analyze the correlation between the content of heavy metals in potatoes planted in the soil of karst landform and the soil’s environmental factors (soil heavy metals, soil pH, soil organic matter, altitude). Weining county (Guizhou province, China) is a typical karst landform, and has a potato production yield of 2.7 million tons. In this study, 56 soil and potato samples were collected from Weining county and the heavy metal content in the soils and potatoes was detected by inductively coupled plasma atomic mass spectrometry (ICP-MS). The content of Cr, Ni, and As in the soil was found to be higher, with almost half of the samples exceeding the maximum allowable levels. A total of 9 of the 56 samples tested had pollution load index values greater than 1.0, which indicates serious soil pollution. It was found that the ability of the potato to absorb heavy metals from the soil was very low, with the average bio-concentration factors of the metals Zn, Cu, Pb, Cr, Ni, and As being 0.087, 0.088, 0.0028, 0.0034, 0.0066, and less than 0.001, respectively. The content of the six heavy metals in the potatoes were all lower than the maximum permissible limit. The results show that a high As content in the soil could increase the content of Pb in potatoes, that a lower pH was beneficial to the bioaccumulation of Cr and Ni in potatoes, and that a high altitude is detrimental to the bioaccumulation of zinc and copper in potatoes. The HRI ranged between 1.12 × 10−2 and 5.92 × 10−2.
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- 2022
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11. The Measurement of Strength in Children: Is the Peak Value Truly Maximal?
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Hayao Ozaki, Takashi Abe, Scott J. Dankel, Jeremy P. Loenneke, Toshiharu Natsume, Pengyu Deng, and Hisashi Naito
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strength development ,forearm muscle thickness ,grip strength ,ultrasonography ,Pediatrics ,RJ1-570 - Abstract
It is unclear whether the measurement of maximum muscle strength in younger children can be performed accurately due to factors such as motivation and maturity (i.e., the ability to receive instruction). If there is a large change in a ratio between muscular strength and size from the youngest to the oldest, then this might provide some indication that the youngest may not have been able to voluntarily activate their muscles for reasons mentioned previously. The purpose of this study was to observe the ratio between handgrip strength (HGS) and forearm muscle thickness (MT) across differing ages in younger children. A total of 1133 preschool children (559 boys and 574 girls) between the ages of 4.5 and 6.5 years had MT and HGS measurements and calculated the ratio of HGS/MT (kg/cm). Linear regression was used to assess the impact of age and sex on the dependent variables of MT, HGS, and the HGS/MT ratio. The HGS/MT ratio increases moderately from age 4.5 to 6.5 in both boys and girls. However, the difference in this ratio was small between the age ranges in this sample. Our results indicate children as young as 4.5 may be accurately measured with the handgrip strength test.
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- 2020
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12. Changes in physical activity and weight status of Chinese children: A retrospective longitudinal study
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Pengyu Deng, Noriko Ichinoseki-Sekine, Liangfu Zhou, and Hisashi Naito
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accelerometer, mvpa ,overweight ,obese ,who recommendations ,Sports medicine ,RC1200-1245 ,Physiology ,QP1-981 - Abstract
The aims of this study were to describe longitudinal changes in objectively measured physical activity (PA) in Chinese children and to investigate the associations of such changes with weight status, gender, and day of the week. This study was conducted on 50 boys and 43 girls. Children underwent measurements in 2011 (age 7-8 years, 2nd grade) and in 2014 (age 10-11 years, 5th grade). The children were divided into: normal weight (NW) or overweight/obese (OW/OB) groups based on weight status recorded in 2014. PA was quantified by steps measured using a uniaxial accelerometer, then total PA time and time spent performing moderate to vigorous PA (≥ 3 METs) were analyzed separately for weekdays and weekends. The daily PA outcomes and normalized PA outcomes per hour (steps, total PA time, and moderate to vigorous PA) declined with age in the OW/OB group on weekends for boys and on both weekdays and weekends for girls (p < 0.05). But no change was observed in the NW group of boys and girls. The percentages of achieving the global recommendations by WHO also declined with age in the OW/OB group for boys on weekdays (p < 0.05). Moreover, they had significantly less percentages of achieving the WHO recommendations than that of the NW group for boys on both weekdays and weekends in 2014 (p < 0.05). Our findings suggest that longitudinal changes in PA, predominantly in the quantity and intensity of activity, are related to weight status in children. Prevention of this decline in PA among children in OW/OB children, particularly on weekends for boys and on both weekdays and weekends for girls may be a suitable health promotion target.
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- 2016
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13. Relationship between Skeletal Muscle and Physical Activity in 4- to 6-year-olds
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Pengyu, Deng, primary, Hayao, Ozaki, additional, Toshiharu, Natsume, additional, Yoshihiko, Ishihara, additional, Dandan, Ke, additional, Koya, Suzuki, additional, and Hisashi, Naito, additional
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- 2023
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14. Enantioselectivity of indoxacarb enantiomers in Bombyx mori larvae: toxicity, bioaccumulation and biotransformation
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Qiao Lin, Pengyu Deng, Tianyou Feng, Guipeng Ou, Lianhong Mou, and Yuping Zhang
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Insect Science ,General Medicine ,Agronomy and Crop Science - Published
- 2023
15. Site-Specific Muscle Loss in the Abdomen and Anterior Thigh in Elderly Males with Locomotive Syndrome
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Toshinori Yoshihara, Hiroyuki Kobayashi, Toshiharu Natsume, Takuya Osawa, Hisashi Naito, Yoshihiko Ishihara, Pengyu Deng, Shuji Sawada, Shuich Machida, Takashi Nakagata, Hayao Ozaki, and Tomoharu Kitada
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Male ,Physical Therapy, Sports Therapy and Rehabilitation ,elderly ,physical function ,Abdomen ,medicine ,Humans ,Orthopedics and Sports Medicine ,Muscle Strength ,Muscle, Skeletal ,muscle thickness ,Anterior compartment of thigh ,Aged ,Muscle loss ,business.industry ,geriatric locomotive function ,Syndrome ,Anatomy ,mobility ,medicine.anatomical_structure ,Thigh ,GV557-1198.995 ,Sports medicine ,Female ,business ,RC1200-1245 ,Locomotion ,Research Article ,Sports - Abstract
Although locomotive syndrome (LS) is a condition of reduced mobility, little information is available regarding the loss of site-specific skeletal muscle mass. The aim of the present study is to examine site-specific muscle loss in elderly males with LS. A total of 100 men ranging in age from 65 to 74 years were divided into two groups (LS and non-LS) using LS risk tests including the stand-up test, two-step test, and the 25-question geriatric locomotive function scale Muscle thickness (MTH) at eight sites—anterior and posterior thigh (AT and PT, respectively), anterior and posterior lower leg (AL and PL, respectively), rectus abdominis (RA), anterior and posterior upper arm (AU and PU, respectively), and anterior forearm (AF)—was evaluated using B-mode ultrasound. Furthermore, the 30-s chair stand test (CS-30), 10-m walking time, zig-zag walking time, and sit-up test were assessed as physical functions. There were no significant differences in age and body mass index between the LS and non-LS groups. The percentage of skeletal muscle was lower in the LS group than in the non-LS group. Although there were no differences in the MTH of AU, PU, AF, PT, Al and PL, site-specific muscle loss was observed at RA and AT in the LS group. CS-30, 10-m walking time, zig-zag walking time, and sit-up test in the LS group were all worse than those in the non-LS group. The MTHs of RA and AT were both correlated to those physical functions. In conclusion, the LS group had site-specific muscle loss and worse physical functions. This study suggests that site-specific changes may be associated with age-related physical functions. These results may suggest what the essential characteristics of LS are.
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- 2021
16. Constructing of a scientific fitness literacy evaluation model for adults
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Yanfeng Zhang, Yibo Gao, Pengyu Deng, Huan Wang, Dongming Wu, Jinmei Fu, Fuhong Zhang, Hisashi NAITO, Sen Lin, Xiang Pan, Lupei Jiang, Shuangying Zhao, Aoyu Zhang, and Jin He
- Abstract
COVID-19-associated lockdown has been implemented worldwide, potentially causing unfavorable changes in lifestyle and psychological health. Physical literacy, healthy diets, and lifestyles play important roles in mitigating the adverse effects. Therefore, this study aimed to enable individuals to understand their fitness literacy and establish a personalized exercise plan. In this study, 903 adults aged 19-59 were surveyed based on the concept of scientific fitness literacy and the influencing factors in the context of the effective containment of COVID-19 before (2019) and during (2020) the pandemic. This study screened four factors from four dimensions–cognition, attitude, ability and skills, and behavior and habits–that can influence adults' scientific fitness literacy. Confirmatory factor analysis (CFA) and AMOS software were used to construct an evaluation index system of scientific fitness literacy for adults. The model consisting 10 items with 4 factors to evaluation index system has good overall fitness, reliability, convergent validity, differential validity, and model stability and was able to analyze the factors that affect the scientific fitness literacy of individuals from different perspectives. This allowed individuals at different stages to have a deeper understanding of scientific fitness literacy.
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- 2022
17. Study on the Status of Scientific Fitness Literacy of Rural Left-Behind Minors and the Influence of Family Environment
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Xiang Pan, Yibo Gao, Lupei Jiang, Pengyu Deng, Jin He, Tian Xia, Aoyu Zhang, and Yanfeng Zhang
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left-behind minors ,rural ,scientific fitness literacy ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health - Abstract
There are a large number of 6.97 million left-behind children in China at the end of August 2018. Left-behind children exhibit many psychologically unhealthy behavioural disorders. This study aimed to compare the differences in scientific fitness literacy (SFL) between rural left-behind and general minors, and to analyze the factors affecting the SFL of left-behind minors in the family environment. A random stratified sampling was conducted among minors aged 3–18 in rural areas of China, and 2239 valid samples were obtained. The questionnaire is based on the SFL part and the family environment part of the China National Fitness Activity Status Survey, except for the SFL part of the children’s questionnaire does not contain the attitude dimension, the questionnaires of several other age groups contain three dimensions: attitude, skills, and habits. The SFL of general children and adolescents was higher than that of left-behind children and adolescents, and in the sub-dimensions, children’s attitudes and adolescents’ skills and habits differed greatly, with the general minors having better performance. The SFL showed a significant increasing trend with age in the general minors but the difference between children and adolescents in the left-behind minors was not significant. The scores of habituation in left-behind minors increased with age group, and the scores of the general minors group did not vary much between age groups. In the multiple regression analysis for the left-behind minors, it was found that left-behind young children were less influenced by family environment on SFL score, and children’s SFL was more influenced by family environment. A separate analysis of the 7–9 and 10–12-year-old groups revealed that factors such as parental support and encouragement influenced SFL with different weights, and the importance of parents rotated, while the number of sporting goods in the family was important in all four age models. For the left-behind minors with a large amount in China, the role of the family environment in their SFL cannot be ignored, and the promotion of this literacy should be carried out in a targeted manner.
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- 2022
18. Associations of morphological changes in skeletal muscle with physical activity in preschool children
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Pengyu Deng, Hayao Ozaki, Toshiharu Natsume, Dandan Ke, Dajiang Lu, Koya Suzuki, and Hisashi Naito
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Background:Physical activity (PA) is likely to be the most important modifiable factor in skeletal muscle development. However, the influence of PA on skeletal muscle of preschool children has not been thoroughly investigated. The main objective of this study is to objectively measure PA) and then evaluate the association between site-specific muscle changes and PA in relation to sex and weight statusin preschool children aged 3 to 4 years. Methods: A total of 86 healthy preschool children, aged 3-4 years, were instructed to wear an accelerometer for seven consecutive days. The number of steps taken daily and minutes spent in moderate-to-vigorous PA (MVPA) and total PA (TPA) were recorded. Muscle thickness was measured by B-mode ultrasonography using a 5-18 MHz scanning head. muscle thickness was measured at seven sites: the lateral forearm, upper arm, abdomen, anterior and posterior thigh, anterior and posterior lower leg. Results: There was no significant difference between boys and girls in terms of MVPA and TPA on weekdays and weekends. According to the linear regression models, after adjusting for daylight duration, the muscle of the posterior thigh was significantly positively associated (p < 0.05) with daily steps and MVPA on weekdays for boys and girls, respectively. Conclusions: We found that the muscle thickness of the posterior thigh in preschool children was significantly positively associated with PA, as measured by daily steps and MVPA. We suggest that for the overall health and wellbeing of preschool children, levels of PA should be maintained and/or increased, and preferably transformed into a regular part of daily living.
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- 2022
19. Serum albumin levels as a predictive biomarker for low-load resistance training programs’ effects on muscle thickness in the community-dwelling elderly Japanese population: interventional study result
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Hayao Ozaki, Shuji Sawada, Pengyu Deng, Toshinori Yoshihara, Takuya Osawa, Hiroyuki Kobayashi, Shuichi Machida, Daiki Nakano, Hisashi Naito, and Toshiharu Natsume
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Male ,medicine.medical_specialty ,medicine.medical_treatment ,Serum albumin ,Muscle hypertrophy ,Japan ,Internal medicine ,medicine ,Humans ,Muscle Strength ,Muscle, Skeletal ,Aged ,Rehabilitation ,biology ,business.industry ,Research ,RC952-954.6 ,Training effect ,Odds ratio ,medicine.disease ,Resistance training ,Quartile ,Geriatrics ,Sarcopenia ,biology.protein ,Biomarker (medicine) ,Female ,Independent Living ,Geriatrics and Gerontology ,business ,Biomarkers - Abstract
Background Resistance training has been recommended as an effective measure against age-related loss of muscle mass and muscle strength, called sarcopenia, even in older adults. However, despite subjecting each participant to the same training program, the training effect solely depended on the individual. This study aimed to evaluate whether certain blood parameters influenced the effect of a low-load resistance training program on muscle thickness in the community-dwelling elderly population. Methods Sixty-nine community-dwelling Japanese (49 women and 20 men) subjects aged 69.4 ± 6.5 years were included. Low-load resistance training was performed twice a week for 12 weeks. Muscle thickness at the anterior aspects of the thigh (AT) was measured using a B-mode ultrasound device, and 22 blood parameter levels were assessed before and after the program. We checked the first quartile value of each parameter to establish cutoff values, and participants were divided into low or normal groups for each parameter. Results A low-load resistance training program significantly increased muscle thickness at the AT. The interaction between time and groups was examined at low ( Conclusions Serum Alb level may act as a biomarker to predict the effects of low-load resistance training programs on muscle hypertrophy in elderly individuals. Trial registration This study was retrospectively registered in UMIN-Clinical Trial Registry (CTR), ID: UMIN000042759 (date of registration, 14 Dec 2020).
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- 2021
20. Correlation analysis between soccer participation and liking or being proficient in it: A study with children and adolescents in China
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Yibo Gao, Huan Wang, Dongming Wu, Pengyu Deng, Xiang Pan, Lupei Jiang, and Yanfeng Zhang
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Children's and adolescents' participation in soccer is low in all regions of China. To achieve coordinated development of soccer in all regions and contribute to a strong sports nation, this study aims to identify the factors that influence the participation of children and adolescents in soccer programs through a cross-sectional analysis of the "soccer population" of children and adolescents aged 7–18. A total of 38,258 children and adolescents aged 7–18 completed a questionnaire; children in the 7–9 age group were helped by their primary guardians. The questions concerned the family level, school level, community level, and individual level. The results showed that the area of the region and the average annual precipitation were correlated with the participation of children and adolescents in soccer programs. In addition, the percentage of children and adolescents participating in soccer programs was higher than the percentage of those who liked it and were proficient in it. Parental encouragement and support, as well as easy access, availability, and safety of sports facilities, are likely to promote children's and adolescents' participation in soccer programs.
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- 2022
21. Influence of Family Environment on the Scientific Fitness Literacy of Preschool and School Children in China: A National Cross-Sectional Study
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Xiang Pan, Huan Wang, Dongming Wu, Xinhua Liu, Pengyu Deng, and Yanfeng Zhang
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Cross-Sectional Studies ,Schools ,Literacy ,screen time ,exercise ,motivation ,health ,attitude ,Health, Toxicology and Mutagenesis ,Child, Preschool ,Public Health, Environmental and Occupational Health ,Educational Status ,Humans ,Child ,Exercise - Abstract
Scientific fitness literacy (SFL) is a holistic concept based on physical literacy but has a smaller scope and is more specific to exercise and scientific fitness. We developed an instrument to assess SFL and explored the differences and similarities in the effects of the home environment on children’s SFL. Data from a nationwide stratified random sample of children were analyzed using multiple linear regression. SFL scores were significantly lower for preschoolers than for school-age children. The family environment has an impact throughout the preschool and school years, with school-age children’s SFL being less influenced by family members than preschool children; screen time has a negative impact on their SFL but reducing the number of electronic devices and increasing parental physical activity and modeling can alleviate its impact. The economic status of the family is crucial, with sports consumption expenditure and household sports equipment ownership being favourable factors for children’s SFL. Positive parental attitudes and sporting habits have a positive impact on their children’s SFL. The findings of this study can be used to improve children’s SFL in the home environment and to take effective measures to avoid the risk factors.
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- 2022
- Full Text
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22. Association between Daily Physical Activity and Locomotive Syndrome in Community-Dwelling Japanese Older Adults: A Cross-Sectional Study
- Author
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Yoshihiko Ishihara, Hayao Ozaki, Takashi Nakagata, Toshinori Yoshihara, Toshiharu Natsume, Tomoharu Kitada, Masayoshi Ishibashi, Pengyu Deng, Yasuyuki Yamada, Hiroyuki Kobayashi, Shuichi Machida, and Hisashi Naito
- Subjects
Male ,Cross-Sectional Studies ,Japan ,Health, Toxicology and Mutagenesis ,Public Health, Environmental and Occupational Health ,Humans ,Female ,Independent Living ,Syndrome ,Middle Aged ,locomotive disorders ,daily step count ,moderate to vigorous physical activity ,triaxial accelerometer ,aging ,Exercise ,Aged - Abstract
This study aimed to evaluate the association between locomotive syndrome (LS) and daily physical activity (PA) in community-dwelling older adults. This cross-sectional study included 80 healthy Japanese older adults (40 men and 40 women; age: 60–79 years). Habitual daily PA was evaluated using a triaxial wrist accelerometer. Participants were divided into two groups based on the results of the two-step test, stand-up test, and 25-question geriatric locomotive function scale. Binomial logistic regression analysis was conducted to examine the statistical relationships between daily PA and category of LS, adjusting for age from adjusted odds ratio (adjusted OR) with the 95 percent confidence intervals (95%CI) and bootstrap 95%CI. The mean step count and time spent on moderate to vigorous physical activity (MVPA) were significantly higher among non-LS participants than among LS participants in women, but not in men. Logistic regression analyses indicated that spending longer than 28 min/day on MVPA was significantly associated with a lower likelihood of LS relative to short time category under 28 min/day in women (adjusted OR = 0.12, 95%CI = 0.02–0.59, bootstrap 95%CI = 0.01–0.43), but not in men. This study suggests that in community-dwelling older women, those with higher MVPA had lower odds of LS, and daily MVPA was associated with LS, but not in men. Therefore, the associations between LS and daily physical activity were partly dependent on sex differences.
- Published
- 2022
23. Muscle Size and Strength of the Lower Body in Supervised and in Combined Supervised and Unsupervised Low-Load Resistance Training
- Author
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Hayao Ozaki, Shuji Sawada, Takuya Osawa, Toshiharu Natsume, Toshinori Yoshihara, Pengyu Deng, Shuichi Machida, Hisashi Naito
- Subjects
lcsh:Sports ,aged ,body weight ,lcsh:GV557-1198.995 ,muscle adaptations ,elastic band ,strength training ,lcsh:Sports medicine ,lcsh:RC1200-1245 - Abstract
This study aimed to clarify whether low-load resistance training at a low frequency (twice a week) using body weight and elastic band improves muscle size, muscle strength, and physical functions and to compare the training effects between supervised training and a combination of supervised and unsupervised training in untrained older adults. Fifty-one older adults (ages: 57-75 years) selected to either a supervised (S) training group (n = 34) or a combined supervised and unsupervised (SU) group (n = 17). Both groups performed low-load resistance training composed of nine exercises for 12 weeks. The S group participated in supervised exercise sessions twice a week, and the SU group performed a supervised exercise session once a week and an unsupervised exercise session at home also once a week. For muscle thicknesses in the anterior aspects of the forearm, upper arm, and thigh and the posterior aspect of the thigh, group × time interactions were observed (p < 0.05). The hypertrophic effects were higher in the S group. Isometric knee extension strength and physical functions increased similarly in both groups. Low-load resistance training using body weight and elastic band twice a week for 12 weeks induces muscle hypertrophy and increases muscle strength and physical functions in older adults. Although the muscle hypertrophic effects are greater in the S group than in the SU group, the other effects were similar between the groups.
- Published
- 2020
24. A longitudinal study of handgrip strength asymmetry
- Author
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Takashi Abe, Hayao Ozaki, Jeremy P. Loenneke, Toshiharu Natsume, Pengyu Deng, and Hisashi Naito
- Subjects
Male ,Hand Strength ,Hand ,Functional Laterality ,Cross-Sectional Studies ,Anthropology ,Child, Preschool ,Genetics ,Humans ,Female ,Longitudinal Studies ,Anatomy ,Child ,Ecology, Evolution, Behavior and Systematics - Abstract
The previous results from cross-sectional studies indicate that there could be alterations across time in handgrip strength (HGS) asymmetry. One way to investigate this is to test the same children multiple times. Therefore, we aimed to evaluate the laterality of HGS in healthy young children at two different time points separated by a year.A total of 165 preschool children (79 males and 87 females) between the ages of 4.5 and 5.6 years participated and performed maximal voluntary HGS in both hands using a Smedley handgrip dynamometer. We ran a paired sample t-test on the difference scores (right - left vs. right - left) to determine if HGS (right vs. left) differed across time.The difference between hands (t = -4.804, p .0001) did differ between time points. At the initial test, the mean value of the HGS in the right hand was approximately 15% higher than that of the left hand. This difference between hands was reduced following a year. The mean bias between tests (second test - initial test) and the 95% limits of agreement was -0.84 (-5.27, 3.58) kg.Contrary to our hypothesis, HGS asymmetry during the initial test (at age 5) was not observed in the second test completed a year later (at age 6). These results suggest that HGS asymmetry is uncertain in children between 5 and 6 years. In this short-term study, it was impossible to ascertain when HGS asymmetry first appeared. Longer term studies are required to better determine when these changes occur.
- Published
- 2022
25. Locomotive Syndrome Associated With Daily Moderate to Vigorous Physical Activity in Community‐dwelling Older Adults: A Cross-sectional Analysis
- Author
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Yoshihiko Ishihara, Hayao Ozaki, Takashi Nakagata, Toshinori Yoshihara, Toshiharu Natsume, Tomoharu Kitada, Masayoshi Ishibashi, Pengyu Deng, Yasuyuki Yamada, Hiroyuki Kobayashi, Shuichi Machida, and Hisashi Naito
- Abstract
Background: Locomotive syndrome (LS) is associated with weakness and loss of function in the musculoskeletal organs. To evaluate the association between LS and daily physical activities (PA) in community-dwelling older adults using a three-axis accelerometer. Methods: This cross-sectional study included healthy 80 older adults (40 men and 40 women; age: 60-79 years). Three functional tests, the two-step test, the stand-up test, and the 25-question geriatric locomotive function scale (GLFS) were used to assess the risk of LS. Maximal isometric muscle strengths of the knee extensors were examined, and the weight bearing index (knee extension strength/body weight) was calculated. Habitual daily PA was evaluated using a three-axis wrist accelerometer. Results: Of the 80 participants, 41 (51.3%) fulfilled the diagnostic criteria for LS (including a two-step test score < 1.3, difficulty with one-leg standing from 40 cm in the stand-up test, and a 25-question GLFS score ≥ 7) We found that step count and time spent performing moderate to vigorous PA (MVPA) were significantly higher in women participants without LS compared to those with LS (p = 0.01); no significant difference was found in men. Logistic regression analyses indicated a longer time spent performing MVPA (> 47.26 min/day) was associated with a lower risk of LS compared to only performing for 21.11 min/day. Conclusions: Our data showed that daily MVPA using a three-axis accelerometer was associated with LS in community-dwelling older adult women, but not in men.
- Published
- 2022
26. Effects of Progressive Walking and Stair-Climbing Training Program on Muscle Size and Strength of the Lower Body in Untrained Older Adults
- Author
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Hayao Ozaki, Takashi Nakagata, Toshinori Yoshihara, Tomoharu Kitada, Toshiharu Natsume, Yoshihiko Ishihara, Pengyu Deng, Hiroyuki Kobayashi, Shuichi Machida, Hisashi Naito
- Subjects
lcsh:Sports ,aged ,lcsh:GV557-1198.995 ,ambulation ,muscles ,lcsh:Sports medicine ,strength ,lcsh:RC1200-1245 ,human activities ,stair climbing - Abstract
The purpose of the present study was to investigate the effect of the progressive walking program on lower limb muscle size and strength and evaluated whether the stair-climbing exercise provided additional training effects when combined with the walking program. Fifteen elderly subjects (age 69 ± 1 years, height 1.63 ± 0.02 m, body weight 64.5 ± 2.0 kg) were randomly assigned to a walking group or a walking and stair-climbing group. The progressive walking program comprised continuous (week 1-8) and interval (week 9-17) exercises. The walking and stair-climbing group also performed stair climbing. Muscle thickness, strength, and walking performance were evaluated before and 8 and 17 weeks after the start of the program. The muscle thickness of the anterior and posterior parts of the thigh significantly (p < 0.05) increased in both groups. There was also a significant (p < 0.01) main effect of time in isometric maximal strength and the values expressed relative to body mass for both knee extension and flexion. However, no group × time interactions were noted. Furthermore, the percentage change of knee flexion strength after the training period was significantly (p < 0.01) correlated with the pre-intervention value. Seventeen weeks of the progressive walking program can increase thigh muscle size and strength for older adults; however, an added stair-climbing exercise may not provide additional training effects. Furthermore, the magnitude of improvement in knee flexion strength would depend on the pre-intervention value.
- Published
- 2019
27. Comparing toxicity and biodegradation of racemic glufosinate and L-glufosinate in green algae Scenedesmus obliquus
- Author
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Xiurou Meng, Fei Wang, Yunfang Li, Pengyu Deng, Deyu Hu, and Yuping Zhang
- Subjects
Environmental Engineering ,Herbicides ,Aminobutyrates ,Environmental Chemistry ,Stereoisomerism ,Pollution ,Waste Management and Disposal ,Scenedesmus - Abstract
Glufosinate-ammonium, a widely used chiral herbicide, has become the focus of attention because of its toxicity toward non-target organisms and its degradation behavior in the environment. With the introduction of L-glufosinate-ammonium products, the toxicity and environmental behavior of rac-glufosinate-ammonium and L-glufosinate-ammonium have become the subject of increasing interest. The overall goal of this study was to investigate the differences in toxicity and biodegradation of rac-glufosinate-ammonium and L-glufosinate-ammonium in an aquatic organism, Scenedesmus obliquus. The toxicity of rac-glufosinate-ammonium and L-glufosinate-ammonium to S. obliquus was compared by measuring EC
- Published
- 2021
28. The 30-s chair stand test can be a useful tool for screening sarcopenia in elderly Japanese participants
- Author
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Toshinori Yoshihara, Yoshihiko Ishihara, Nobuhiro Sato, Hayao Ozaki, Pengyu Deng, Ken Kimura, Takuya Osawa, Hisashi Naito, Shuji Sawada, Shuichi Machida, Toshiharu Natsume, Takashi Nakagata, and Tomoharu Kitada
- Subjects
Male ,medicine.medical_specialty ,Sarcopenia ,Sports medicine ,medicine.medical_treatment ,Diseases of the musculoskeletal system ,Isometric exercise ,03 medical and health sciences ,0302 clinical medicine ,Elderly ,Rheumatology ,Japan ,Internal medicine ,Epidemiology ,medicine ,Humans ,Orthopedics and Sports Medicine ,030212 general & internal medicine ,Muscle Strength ,Aged ,Rehabilitation ,Hand Strength ,business.industry ,Research ,Chair stand test ,Reproducibility of Results ,medicine.disease ,musculoskeletal system ,Test (assessment) ,body regions ,Cross-Sectional Studies ,Lower limb muscle strength ,RC925-935 ,Physical therapy ,Female ,business ,human activities ,030217 neurology & neurosurgery - Abstract
Background Low muscle strength has been focused on as an essential characteristic of sarcopenia, and the 30-s chair stand test (CS-30) could be a particularly useful test for assessing muscle strength. While it is speculated to be a beneficial tool for the assessment of sarcopenia, this remains to be verified. In this study, we examined the reliability and optimal diagnostic score of the CS-30 for assessing sarcopenia in elderly Japanese participants. Methods This cross-sectional study included 678 participants (443 females and 235 males) who underwent the test for sarcopenia as per the Asian Working Group for Sarcopenia (AWGS) 2019, the CS-30 test, and the isometric knee-extension muscle strength test. ROC analysis was used to estimate the optimal CS-30 scores at which sarcopenia was detected. Results CS-30 scores were positively associated with sarcopenia (OR: 0.88; 95% CI:0.82–0.93). The AUC of the CS-30 for sarcopenia definition were 0.84 (p p Conclusions The CS-30 was found to be a reliable test for sarcopenia screening in the elderly Japanese population.
- Published
- 2021
29. Serum Albumin Levels as a Predictive Biomarker for Low-Load Resistance Training Programs’ Effects on Muscle Thickness in the Community-Dwelling Elderly Japanese Population: Results From the Interventional Study
- Author
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Pengyu Deng, Toshinori Yoshihara, Takuya Osawa, Hayao Ozaki, Shuichi Machida, Daiki Nakano, Toshiharu Natsume, Shuji Sawada, Hisashi Naito, and Hiroyuki Kobayashi
- Subjects
medicine.medical_specialty ,biology ,business.industry ,Internal medicine ,Resistance training ,medicine ,Serum albumin ,biology.protein ,Low load ,Japanese population ,business ,Predictive biomarker - Abstract
Background Resistance training has been recommended as an effective measure against age-related loss of muscle mass and muscle strength, called sarcopenia, even in older adults. However, despite subjecting each participant to the same training program, the training effect solely depended on the individual. This study aimed to evaluate whether certain blood parameters influenced the effect of a low-load resistance training program on muscle thickness in the community-dwelling elderly population.Methods Sixty-nine community-dwelling Japanese (49 women and 20 men) subjects aged 69.4±6.5 years were included. Low-load resistance training was performed twice a week for 12 weeks. Muscle thickness at the anterior aspects of the thigh (AT) was measured using a B-mode ultrasound device, and 22 blood parameter levels were assessed before and after the program. We checked the first quartile value of each parameter to establish cutoff values, and participants were divided into low or normal groups for each parameter.Results A low-load resistance training program significantly increased muscle thickness at the AT. The interaction between time and groups was examined at low (Conclusions Serum Alb level may act as a biomarker to predict the effects of low-load resistance training programs on muscle hypertrophy in elderly individuals.Trial registration This study was retrospectively registered in UMIN-Clinical Trial Registry (CTR), ID: UMIN000042759. Date of registration: 14/12/2020.
- Published
- 2021
30. Analysis of the influencing factors of Chinese children and adolescents' scientific fitness literacy
- Author
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Jingjing Wang, Dongming Wu, Yanfeng Zhang, Hisashi Naito, Pengyu Deng, and Li Sen
- Subjects
Gerontology ,media_common.quotation_subject ,MEDLINE ,Physical Therapy, Sports Therapy and Rehabilitation ,Orthopedics and Sports Medicine ,Psychology ,Literacy ,media_common - Published
- 2020
31. Study on the anti-inflammatory and analgesic effects of white peony root and mucuna pruriens and their combinations in vivo
- Author
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ShiBo Zhao, XueYing Yu, HuiMan Yang, HanJun Ma, XueWei Huang, PengYu Deng, ShiYou Zhou, and SuoYi Huang
- Published
- 2022
32. Effects of a progressive walking program on the risk of developing locomotive syndrome in elderly Japanese people: a single-arm trial
- Author
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Pengyu Deng, Yoshihiko Ishihara, Hisashi Naito, Muneaki Ishijima, Toshiharu Natsume, Hiroyuki Kobayashi, Shuichi Machida, Masayoshi Ishibashi, Takuya Osawa, Takashi Nakagata, Hayao Ozaki, Toshinori Yoshihara, and Tomoharu Kitada
- Subjects
medicine.medical_specialty ,Knee extensors ,business.industry ,Walking training ,Muscle weakness ,Physical Therapy, Sports Therapy and Rehabilitation ,030229 sport sciences ,Isometric exercise ,Physical function ,03 medical and health sciences ,Grip strength ,0302 clinical medicine ,Physical medicine and rehabilitation ,Joint angle ,Muscle strength ,medicine ,Original Article ,030212 general & internal medicine ,medicine.symptom ,business ,Locomotive syndrome ,Knee flexor ,human activities - Abstract
[Purpose] This study aimed to identify the efficacy of a progressive walking program on the risk of developing locomotive syndrome among untrained elderly Japanese people. [Participants and Methods] Twenty-four untrained elderly individuals (68 ± 4 years) completed a 17-week progressive walking program. The stand-up, two-step tests and the 25-question geriatric locomotive function scale were used to assess the risk of locomotive syndrome at baseline, the 8-week midpoint (2 months), and the 17-week endpoint (4 months). Maximal isometric muscle strength of the knee extensors and flexors were measured using a dynamometer with the hip joint angle at 90° of flexion and physical function (the 30-s sit-to-stand, sit-up, 10-meter walk, and grip strength) were evaluated. [Results] The 4-month walking program significantly improved the two-step test and geriatric locomotive function scale scores. This may be attributable to the improvement in knee flexor strength and physical function. [Conclusion] A 4-month program of progressive walking effectively lowered the risk of developing locomotive syndrome in elderly Japanese people by improving knee flexor muscle strength and physical function.
- Published
- 2018
33. Effects of 6-Month Walking Program and 12-Month Detraining on Locomotive Syndrome Risk Stages and Brisk Walking Speed in Middle-Aged and Elderly Japanese People: a Case Report
- Author
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Hisashi Naito, Shuichi Machida, Pengyu Deng, Toshiharu Natsume, Toshinori Yoshihara, Hayao Ozaki, Takuya Osawa, Tomoharu Kitada, Yoshihiko Ishihara, and Takashi Nakagata
- Subjects
Brisk walking ,medicine.medical_specialty ,Physical medicine and rehabilitation ,business.industry ,Medicine ,business - Published
- 2018
34. Daily Physical Activity Among Children Between Ethnic Han and Mongolians in China
- Author
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Batu Bao, Hisashi Naito, Tianshuo Xu, and Pengyu Deng
- Subjects
Geography ,Ethnic group ,Physical activity ,China ,Demography - Published
- 2018
35. The Measurement of Strength in Children: Is the Peak Value Truly Maximal?
- Author
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Hisashi Naito, Toshiharu Natsume, Hayao Ozaki, Pengyu Deng, Jeremy P. Loenneke, Scott J. Dankel, and Takashi Abe
- Subjects
business.industry ,Communication ,Forearm muscle ,lcsh:RJ1-570 ,lcsh:Pediatrics ,ultrasonography ,Physical strength ,Age and sex ,Grip strength ,grip strength ,Pediatrics, Perinatology and Child Health ,Linear regression ,Muscle strength ,Medicine ,strength development ,Peak value ,Ultrasonography ,business ,forearm muscle thickness ,Demography - Abstract
It is unclear whether the measurement of maximum muscle strength in younger children can be performed accurately due to factors such as motivation and maturity (i.e., the ability to receive instruction). If there is a large change in a ratio between muscular strength and size from the youngest to the oldest, then this might provide some indication that the youngest may not have been able to voluntarily activate their muscles for reasons mentioned previously. The purpose of this study was to observe the ratio between handgrip strength (HGS) and forearm muscle thickness (MT) across differing ages in younger children. A total of 1133 preschool children (559 boys and 574 girls) between the ages of 4.5 and 6.5 years had MT and HGS measurements and calculated the ratio of HGS/MT (kg/cm). Linear regression was used to assess the impact of age and sex on the dependent variables of MT, HGS, and the HGS/MT ratio. The HGS/MT ratio increases moderately from age 4.5 to 6.5 in both boys and girls. However, the difference in this ratio was small between the age ranges in this sample. Our results indicate children as young as 4.5 may be accurately measured with the handgrip strength test.
- Published
- 2020
36. Physical Activity of Adolescents in a Medium-Sized City in China
- Author
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Yoshihiko Ishihara, Pengyu Deng, and Hisashi Naito
- Subjects
03 medical and health sciences ,0302 clinical medicine ,business.industry ,Physical activity ,Medicine ,030229 sport sciences ,030212 general & internal medicine ,Socioeconomics ,China ,business - Published
- 2016
37. The Measurement of Strength in Children: Is the Peak Value Truly Maximal?
- Author
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Hayao Ozaki, Takashi Abe, Dankel, Scott J., Loenneke, Jeremy P., Toshiharu Natsume, Pengyu Deng, and Hisashi Naito
- Subjects
ULTRASONIC imaging ,SCHOOL children ,DEVELOPMENTAL psychology & motivation ,EMOTION regulation ,MUSCLE strength - Abstract
It is unclear whether the measurement of maximum muscle strength in younger children can be performed accurately due to factors such as motivation and maturity (i.e., the ability to receive instruction). If there is a large change in a ratio between muscular strength and size from the youngest to the oldest, then this might provide some indication that the youngest may not have been able to voluntarily activate their muscles for reasons mentioned previously. The purpose of this study was to observe the ratio between handgrip strength (HGS) and forearm muscle thickness (MT) across differing ages in younger children. A total of 1133 preschool children (559 boys and 574 girls) between the ages of 4.5 and 6.5 years had MT and HGS measurements and calculated the ratio of HGS/MT (kg/cm). Linear regression was used to assess the impact of age and sex on the dependent variables of MT, HGS, and the HGS/MT ratio. The HGS/MT ratio increases moderately from age 4.5 to 6.5 in both boys and girls. However, the difference in this ratio was small between the age ranges in this sample. Our results indicate children as young as 4.5 may be accurately measured with the handgrip strength test. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
38. 日本と中国の幼児における体格及び体力の発育発達の違い
- Author
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Miyata, Hiroyuki, Dajiang Lu, Pengyu Deng, and Koya Suzuki
- Published
- 2017
- Full Text
- View/download PDF
39. Effects of Sex on Muscle Hypertrophy and Strength Gain Induced by Body Mass-Based Resistance Training in Older Adults
- Author
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Takuya Oosawa, Takashi Nakagata, Hayao Ozaki, Hisashi Naito, Tomoharu Kitada, Toshinori Yoshihara, Pengyu Deng, Shuichi Machida, Yoshihiko Ishihara, and Toshiharu Natsume
- Subjects
medicine.medical_specialty ,Endocrinology ,business.industry ,Internal medicine ,medicine ,Resistance training ,business ,Muscle hypertrophy - Published
- 2018
40. Site-Specific Muscle Loss in the Abdomen and Anterior Thigh in Elderly Males with Locomotive Syndrome.
- Author
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Toshiharu Natsume, Hayao Ozaki, Takashi Nakagata, Toshinori Yoshihara, Tomoharu Kitada, Yoshihiko Ishihara, Pengyu Deng, Takuya Osawa, Shuji Sawada, Hiroyuki Kobayashi, Shuich Machida, and Hisashi Naito
- Subjects
- *
MUSCULAR atrophy , *SKELETAL muscle , *NEUROLOGICAL disorders , *THIGH , *GAIT disorders , *ABDOMEN , *BODY mass index - Abstract
Although locomotive syndrome (LS) is a condition of reduced mobility, little information is available regarding the loss of site-specific skeletal muscle mass. The aim of the present study is to examine site-specific muscle loss in elderly males with LS. A total of 100 men ranging in age from 65 to 74 years were divided into two groups (LS and non-LS) using LS risk tests including the stand-up test, two-step test, and the 25-question geriatric locomotive function scale Muscle thickness (MTH) at eight sites--anterior and posterior thigh (AT and PT, respectively), anterior and posterior lower leg (AL and PL, respectively), rectus abdominis (RA), anterior and posterior upper arm (AU and PU, respectively), and anterior forearm (AF)--was evaluated using B-mode ultrasound. Furthermore, the 30-s chair stand test (CS-30), 10-m walking time, zig-zag walking time, and sit-up test were assessed as physical functions. There were no significant differences in age and body mass index between the LS and non-LS groups. The percentage of skeletal muscle was lower in the LS group than in the non-LS group. Although there were no differences in the MTH of AU, PU, AF, PT, Al and PL, site-specific muscle loss was observed at RA and AT in the LS group. CS-30, 10-m walking time, zig-zag walking time, and sit-up test in the LS group were all worse than those in the non-LS group. The MTHs of RA and AT were both correlated to those physical functions. In conclusion, the LS group had site-specific muscle loss and worse physical functions. This study suggests that site-specific changes may be associated with age-related physical functions. These results may suggest what the essential characteristics of LS are. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
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