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Your search keyword '"Sallis, Jim"' showing total 2 results
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2 results on '"Sallis, Jim"'

1. An examination of multilevel factors that may explain gender differences in children's physical activity.

Author

Crespo, Noe C, Corder, Kirsten, Marshall, Simon, Norman, Gregory J, Patrick, Kevin, Sallis, Jim F, and Elder, John P

Subjects
Humans, Obesity, Body Mass Index, Exercise, Multivariate Analysis, Cross-Sectional Studies, Motor Activity, Parents, Sex Factors, Socioeconomic Factors, Adult, Middle Aged, Child, Child, Preschool, Caregivers, California, Female, Male, Accelerometry, accelerometry, behavioral science, environment, health promotion, pediatrics, youth, Behavioral and Social Science, Cardiovascular, Prevention, Clinical Research, Pediatric, Oral and gastrointestinal, Human Movement and Sports Sciences, Public Health and Health Services, Curriculum and Pedagogy, Public Health
Abstract

BackgroundGirls are less physically active than boys, yet no single study has examined the factors that may explain gender differences in children's physical activity (PA).MethodsThis study was a cross-sectional analysis of data from 116 caregivers and their children aged 5-8 years who participated in the MOVE study. Caregivers reported various factors that may relate to children's PA (eg, encouragement for child PA and PA equipment at home). Child PA was measured by 7-day accelerometry. Linear regression tested for the variance in moderate-to-vigorous physical activity (MVPA) explained by gender and several variables. Gender and ethnicity interactions were examined.ResultsCaregivers were mostly female (97%), mean age 38 ± 6 years, mean BMI 28 ± 6 (kg/m2). Child's mean age was 8.1 ± 0.7, 54% were female and 40% were overweight/obese. Girls were less physically active than boys (54.1 ± 19.7 vs. 65.2 ± 28.0 daily minutes of MVPA, respectively). Among girls, more days of PE/week was associated with greater MVPA. Among boys, greater parent support for PA, greater parent modeling for PA, and greater number of PA equipment in the home were associated with greater MVPA.ConclusionsThis study supports that boys and girls have different correlates for MVPA, which may partly explain gender differences in PA.

Published
2013

2. Does physical activity attenuate, or even eliminate, the detrimental association of sitting time with mortality? A harmonised meta-analysis of data from more than 1 million men and women

Author

Ekelund, Ulf, Steene-Johannessen, Jostein, Brown, Wendy, Fagerland, Morten Wang, Owen, Neville, Powell, Kenneth E., Bauman, Adrian, Lee, I. Min, Ding, Ding, Heath, Gregory W., Hallal, Pedro C., Kohl, Harold W., Pratt, Michael, Reis, Rodrigo, Sallis, Jim, Aadahl, Mette, Blot, William J., Chey, Tien, Deka, Anusila, Dunstan, David, Ford, Earl S., Færch, Kristine, Inoue, Manami, Katzmarzyk, Peter T., Kozey Keadle, Sarah, Matthews, Charles E., Martinez, David, Patel, Alpa V., Pavey, Toby, Bjørk Petersen, Christina, Van Der Ploeg, Hidde, Rangul, Vegar, Sethi, Parneet, Sund, Erik R., Westgate, Kate, Wijndaele, Katrien, Yi-Park, Song, Public and occupational health, EMGO - Lifestyle, overweight and diabetes, and EMGO - Musculoskeletal health

Subjects
Male, medicine.medical_specialty, Time Factors, Sitting, Metabolic equivalent, 03 medical and health sciences, 0302 clinical medicine, Risk Factors, Humans, Medicine, Prospective Studies, 030212 general & internal medicine, Mortality, Prospective cohort study, Exercise, Proportional Hazards Models, Sedentary lifestyle, business.industry, Proportional hazards model, Mortality rate, Hazard ratio, 030229 sport sciences, General Medicine, Quartile, Cardiovascular Diseases, Physical therapy, Female, Television, Sedentary Behavior, business, Demography
Abstract

Background High amounts of sedentary behaviour have been associated with increased risks of several chronic conditions and mortality. However, it is unclear whether physical activity attenuates or even eliminates the detrimental effects of prolonged sitting. We examined the associations of sedentary behaviour and physical activity with all-cause mortality. Methods We did a systematic review, searching six databases (PubMed, PsycINFO, Embase, Web of Science, Sport Discus, and Scopus) from database inception until October, 2015, for prospective cohort studies that had individual level exposure and outcome data, provided data on both daily sitting or TV-viewing time and physical activity, and reported effect estimates for all-cause mortality, cardiovascular disease mortality, or breast, colon, and colorectal cancer mortality. We included data from 16 studies, of which 14 were identified through a systematic review and two were additional unpublished studies where pertinent data were available. All study data were analysed according to a harmonised protocol, which categorised reported daily sitting time and TV-viewing time into four standardised groups each, and physical activity into quartiles (in metabolic equivalent of task [MET]-hours per week). We then combined data across all studies to analyse the association of daily sitting time and physical activity with all-cause mortality, and estimated summary hazard ratios using Cox regression. We repeated these analyses using TV-viewing time instead of daily sitting time. Findings Of the 16 studies included in the meta-analysis, 13 studies provided data on sitting time and all-cause mortality. These studies included 1 005 791 individuals who were followed up for 2–18·1 years, during which 84 609 (8·4%) died. Compared with the referent group (ie, those sitting 35·5 MET-h per week]), mortality rates during follow-up were 12–59% higher in the two lowest quartiles of physical activity (from HR=1·12, 95% CI 1·08–1·16, for the second lowest quartile of physical activity [8 h/day). Daily sitting time was not associated with increased all-cause mortality in those in the most active quartile of physical activity. Compared with the referent (35·5 MET-h per week]), there was no increased risk of mortality during follow-up in those who sat for more than 8 h/day but who also reported >35·5 MET-h per week of activity (HR=1·04; 95% CI 0·99–1·10). By contrast, those who sat the least (

Published
2016
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