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We investigated the effects of jammer-type racing swimsuits (RS) on swimming performance during arm-stroke-only (pull) and whole-body stroke (swim) in 25-m front-crawl with maximal effort. Twelve well-trained male collegiate swimmers wore RS and a conventional swimsuit (CS) and performed three tests: pull, swim, and pull using the system to measure active drag (MAD pull). Swimming velocity and intra-abdominal pressure (IAP) were determined in all tests. Stroke indices during pull and swim and drag–swimming velocity relationship and maximum propulsive power during MAD pull were also determined. Swimming velocities during pull and swim while wearing an RS (1.59 ± 0.13 and 1.77 ± 0.09 m·s−1, respectively) were significantly higher than those wearing a CS (1.57 ± 0.14 and 1.74 ± 0.08 m·s−1, respectively). Stroke length during pull and swim was significantly greater while wearing an RS (1.68 ± 0.12 and 1.83 ± 0.13 m, respectively) than wearing a CS (1.63 ± 0.10 and 1.81 ± 0.13 m, respectively). However, no significant differences were confirmed between the other variables in all tests. In conclusion, swimming performance is improved when wearing an RS compared with a CS. [ABSTRACT FROM AUTHOR]

Who gets to be 'sporty' and active in public is an enduring topic of socio-political debate. Disparities in participation continue from limited access, support and funding to ill-fitting equipment and clothing. This article focuses on the latter. Women have long been disproportionally restricted and harassed in public space not only in relation to how, where and when they move but also what they wear. I approach this issue via a unique data source – global clothing inventions for sport and athletic activities (1890–1940). Analysing convertible, multiple and hidden clothing patents, by and for women, reveals how inventors tackled ongoing socio-political restrictions to women's freedom of movement from the ground up and, often secretly, from the inside out. I suggest these data might be read as acts of resistance, enabling wearers to move and inhabit spaces in new ways, engage in a wider range of activities and make claims to equal public participation and mobility rights. These lesser-known clothing inventions invite us below the surface of conventional sporting histories, expand ideas around the creative possibilities of sport and activewear, and spark imaginaries of what other kinds of inclusive and inventive athletic identities might be possible. [ABSTRACT FROM AUTHOR]

Copyright of Mercados y Negocios is the property of Universidad de Guadalajara, Centro Universitario de Ciencias Economico Administrativas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Turkiye Klinikleri Journal of Sports Sciences is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: Sleep is a critical component of recovery, but it can be disrupted following prolonged endurance exercise. The objective of this study was to examine the capacity of male and female professional cyclists to recover between daily race stages while competing in the 2022 Tour de France and the 2022 Tour de France Femmes, respectively. The 17 participating cyclists (8 males from a single team and 9 females from two teams) wore a fitness tracker (WHOOP 4.0) to capture recovery metrics related to night-time sleep and autonomic activity for the entirety of the events and for 7 days of baseline before the events. The primary analyses tested for a main effect of 'stage classification'—i.e., rest, flat, hilly, mountain or time trial for males and flat, hilly or mountain for females—on the various recovery metrics. Results: During baseline, total sleep time was 7.2 ± 0.3 h for male cyclists (mean ± 95% confidence interval) and 7.7 ± 0.3 h for female cyclists, sleep efficiency was 87.0 ± 4.4% for males and 88.8 ± 2.6% for females, resting HR was 41.8 ± 4.5 beats·min−1 for males and 45.8 ± 4.9 beats·min−1 for females, and heart rate variability during sleep was 108.5 ± 17.0 ms for males and 119.8 ± 26.4 ms for females. During their respective events, total sleep time was 7.2 ± 0.1 h for males and 7.5 ± 0.3 h for females, sleep efficiency was 86.4 ± 1.2% for males and 89.6 ± 1.2% for females, resting HR was 44.5 ± 1.2 beats·min−1 for males and 50.2 ± 2.0 beats·min−1 for females, and heart rate variability during sleep was 99.1 ± 4.2 ms for males and 114.3 ± 11.2 ms for females. For male cyclists, there was a main effect of 'stage classification' on recovery, such that heart rate variability during sleep was lowest after mountain stages. For female cyclists, there was a main effect of 'stage classification' on recovery, such that the percentage of light sleep (i.e., lower-quality sleep) was highest after mountain stages. Conclusions: Some aspects of recovery were compromised after the most demanding days of racing, i.e., mountain stages. Overall however, the cyclists obtained a reasonable amount of good-quality sleep while competing in these physiologically demanding endurance events. This study demonstrates that it is now feasible to assess recovery in professional athletes during multiple-day endurance events using validated fitness trackers. Key Points: Some aspects of recovery were compromised in male and female cyclists after mountain stages—which are the most demanding days of racing. Overall though, professional cyclists were able to obtain a reasonable amount of good-quality sleep while competing in the Tour de France (for men) and Tour de France Femmes (for women). This study demonstrates that it is now feasible to use validated fitness trackers to assess the night-time recovery of professional athletes during multiple-day endurance events. [ABSTRACT FROM AUTHOR]

New materialisms call for a (re)thinking of matter as agentic and lively. With the aim to recognize the vitality of matter within qualitative research, scholars are developing material methods and creative processes to explore the intimate connections between humans and nonhumans. Herein we use Barad's understanding of diffraction to revisit the research process as an entanglement of theory, method, and analysis. More specifically, we take up the concept of cutting together-apart, adapting it in a series of creative practices focused on women's exercising bodies and relationships with activewear. In each activity, we experiment with cutting various materials from the project (i.e., digital data, activewear clothing) with each other, feminist colleagues, and project participants. Across these creative experiments, we came to 'new' ways of knowing the activewear phenomenon evoked through the materiality and affective processes of 'cutting,' as well as new ethical considerations about human and nonhuman co-participants. [ABSTRACT FROM AUTHOR]

This study determines the fit of racket sportswear for women's interlock knitted top in different body zones of sports personnel by altering the pattern shapes and fabric yield by using a virtual CAD platform. The fabrics with areal densities of 120, 160, and 200 Grams / Sq.m were chosen, and twenty- seven virtual patterns were developed by altering the patterns in armhole shapes and dart positions based on the measurements taken by female sports personnel. A parametric avatar was created, and all the patterns were simulated to check the fit of the avatar by virtual simulation techniques using Lectra - Modaris software. Ease and strain were determined in critical fit zones and optimized using design expert statistical software to get the perfect fit on the customized avatar. Sportswear has been constructed using optimized parameters, and subjective evaluation is done to compare the virtual and real fit. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Almaty Technological University is the property of Almaty Technological University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Almaty Technological University is the property of Almaty Technological University and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Background: This study aims to identify the changes in the fashion industry, during the COVID-19 pandemic, specifically, within the context of online purchase of fashion products, the use of sportswear, the pondering moments before the purchase, and the importance of sustainability. Furthermore, we also consider sustainability as a fashion strategic factor and its impact in the decision-making process. Purpose: The main purpose is to understand if the type of products and the way they are purchased by the retail consumer have changed, and to assess if the level of importance granted to sustainability is significant, in particular, by evaluating the way COVID-19 pandemic has influenced the online purchase of fashion products, the use of sportswear, the pondering moments before the purchase, and the importance of sustainability. Furthermore, we evaluate if the level of importance granted to sustainability, in the decision-making process, is still the same. Study design/methodology/approach: Quantitative analysis was applied, through an observation data collection technique, using a survey by questionnaire. The sample is non-probabilistic, with the accidental and snowball sampling modalities. Findings/conclusions: the companies must define new strategies to answer their consumers' real needs, because we verify that consumer behaviour changed. It was verified that there was a growth in the amount of online shopping of fashion products, the use of sportswear increased, the level of pondering before buying expanded, and the increasing importance of sustainability became evident. Limitations/future research: A non-probabilistic sample was used, which prevents the possibility of extrapolating general conclusions. [ABSTRACT FROM AUTHOR]

The breasts are reported as the fourth largest barrier to participation in physical activity (PA). This scoping review provides a comprehensive understanding of experiences, knowledge and challenges relating to bra fit and sports participation. The search strategy was adopted by the Preferred Reporting Items for Scoping Reviews (PRISMA-ScR) guidelines and multiple databases were searched. All research was in English and within the last 20 years. Exclusion criteria excluded reviews, male participants and the inability to locate or access full-text articles. The JBI critical appraisal tool assessed methodological quality. Twenty-three studies were included. Key themes from the studies are breast motion during PA, sports bra design, perceived barriers to participation in PA and education/knowledge of breast support and bra fit. Increasing breast support reduces breast movement during PA yet breast motion and bra fit are still the most common breast concerns for females. This is likely influenced by poor breast knowledge, leading to poor breast support choices. Future research should explore to what extent breast motion, knowledge and bra fit influences sport participation, and this research should include a more diverse range of adult ages, cup sizes, ethnicities and PA levels to provide a wider understanding. [ABSTRACT FROM AUTHOR]

Factors such as the growing popularity of sports, changing lifestyles and the increasing number of sporting events contribute significantly to the popularity of sports textiles. Sports textiles play an important role in the performance of athletes, as they need to provide freedom of movement and comfort to the wearer during activity. In this paper, seven conventional and high-performance polyamide and polyester yarns were selected for the development of knitted fabrics for sportswear. The fabrics were manufactured as single jersey and double jersey structures, both with and without incorporated elastane yarn. The fabrics manufactured were tested for mass per unit area, fabric thickness, fabric density, porosity, air permeability and water vapour permeability. The results of the study indicate that the air permeability of all four fabric groups shows a strong correlation with the measured porosity. The average water vapour permeability of single jersey fabrics is significantly higher than that of double jersey fabrics, and the addition of elastane leads to a further reduction. The correlation between the water vapour permeability and the thickness of single jersey, elastane-plated single jersey and double jersey fabrics is negative.

Aim: The authors investigated how the Arena Powerskin R-EVO Closed Back swimsuit and Arena Carbon Triwetsuit (full-sleeve wetsuit), both approved by the Fédération Internationale de Natation (FINA) regulations, affect biomechanics and energetics of 3 elite female open water (OW) swimmers at maximal and 4 submaximal swimming intensities. Methods: Three elite female OW swimmers (OW1 = 24 y, 1.64 m, 60 kg; OW2 = 23 y, 1.69 m, 65 kg; OW3 = 27 y, 1.63 m, 64.5 kg) were tested 1 week prior to a FINA/CNSG (China National Sports Group) Marathon Swim World Series event and 40 days before the 18th FINA World Championships 2019. Each OW swimmer completed 2 identical testing sessions, one with a swimsuit and other with a wetsuit, involving shoulder flexion power output assessed from medicine-ball throw, maximal performance and drag coefficient assessment, and an incremental intermittent swim test at 4 different relative intensities. Results: Estimated peak oxygen uptake was 4.4 L·min−1 for OW1, 5.6 L·min−1 for OW2, and 5.0 L·min−1 for OW3. Despite a distinct behavior observed on index of coordination for OW3, a null index of synchronization, increased stroke rate (mean difference = 2%–8%), reduced drag factor (minimum = −14%; maximum = −30%), lower energy cost (mean difference = −2% to −6%), and faster performance (mean difference = 2% to 3%) were observed with the wetsuit compared with swimsuit for all elite OW swimmers. Conclusion: The wetsuit enhances submaximal swimming performance, and this increase is dependent on the OW swimmer's characteristics. The higher stroke rate and lower stroke length detected with wetsuit could be related to movement constraints imposed by the suit. [ABSTRACT FROM AUTHOR]

Purpose: To determine whether elite female rugby sevens players are exposed to core temperatures (Tc) during training in the heat that replicate the temperate match demands previously reported and to investigate whether additional clothing worn during a hot training session meaningfully increases the heat load experienced. Methods: A randomized parallel-group study design was employed, with all players completing the same approximately 70-minute training session (27.5°C–34.8°C wet bulb globe temperature) and wearing a standardized training ensemble (synthetic rugby shorts and training tee [control (CON); n = 8]) or additional clothing (standardized training ensemble plus compression garments and full tracksuit [additional clothing (AC); n = 6]). Groupwise differences in Tc, sweat rate, GPS-measured external locomotive output, rating of perceived exertion, and perceptual thermal load were compared. Results: Mean (P =.006, η p 2 =.88) and peak (P <.001, η p 2 =.97) Tc were higher in AC compared with CON during the training session. There were no differences in external load (F4,9 = 0.155, P =.956, Wilks Λ = 0.935, η p 2 =.06) or sweat rate (P =.054, Cohen d = 1.09). A higher rating of perceived exertion (P =.016, Cohen d = 1.49) was observed in AC compared with CON. No exertional-heat-illness symptomology was reported in either group. Conclusions: Player Tc is similar between training performed in hot environments and match play in temperate conditions when involved for >6 minutes. Additional clothing is a viable and effective method to increase heat strain in female rugby sevens players without compromising training specificity or external locomotive capacity. [ABSTRACT FROM AUTHOR]

Purpose: Although wearing a wetsuit while swimming, when permitted, is primarily for safety reasons (ie, to protect against hypothermia), changes in buoyancy, biomechanics, and exercise performance have been reported. This narrative review covers the benefits of different wetsuit models on performance in swimming and triathlon. Methods: A computer search of online databases was conducted to locate relevant published research until March 2021. After the screening process, 17 studies were selected for analysis. Results: Most of the selected studies involved pool swimmers or triathletes completing short or middle distances in a pool while using a full or a long sleeveless wetsuit. Swimming with wetsuit elicited significant improvements in performance (maximum 11%), mainly by decreasing drag and energy cost, by increasing buoyancy, and by affecting technique. Different rates of change in each factor were found according to swimming ability and wetsuit model. In addition, wearing a wetsuit was often rated as uncomfortable by athletes. Conclusions: Although improvement in swimming performance by wearing a wetsuit has been reported in the literature, the amplitude of the improvement remains questionable. The enhancement in swimming performance is attributable merely to improvements in propulsion proficiency and buoyancy, as well as a reduction in drag. The extent to which athletes are familiar with the use of a wetsuit, their swimming ability, and the wetsuit model may play important roles in this improvement. More studies simulating competition and comparing elite versus nonelite athletes are needed. [ABSTRACT FROM AUTHOR]

Copyright of International Journal on Humanities & Social Sciences is the property of International Journal on Humanities & Social Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Today, expectations from textile products have increased and the comfort features of clothes have gained more importance, especially for leisure and sports clothes. Therefore, the liquid moisture transmission of clothes is quite important, which has a significant effect on the body's ability to cool itself and the user's feeling cold after sweating. A new test instrument "3D-MMD" (3 Dimension Moisture Mapping Device), that measures the liquid moisture transmission feature of the fabrics in multidirection is introduced in this paper. The developed system includes two thermal cameras that allow measurement below and above of the sample. When the test liquid is dropped on the sample, the heat transfer occurs and due to the heat transfer during the transmission of moisture, the surface temperature of wetted and non-wetted parts of the fabric changes. This change is detected in the form of infrared data with the help of thermal cameras and converted into an electronic image. The wet area can be easily created by processing the images of the color visuals coming instantly from the thermal camera. The patent for this new method has been registered by the Turkish Patent and Trademark Office (TR2020/21004). Meanwhile, the international patent application process continues (PCT/TR2021/051223). [ABSTRACT FROM AUTHOR]

Introduction: This study examined the impact of different upper‐torso sportswear technologies on the performance and physiological heat strain of well‐trained and national‐level athletes during prolonged running in moderately hot conditions. Methods: A randomized crossover design was employed in which 20 well‐trained (n = 16) and national‐level (n = 4) athletes completed four experimental trials in moderately hot conditions (35°C, 30% relative humidity). In each trial, participants ran at 70% of their peak oxygen uptake (70% V̇O2peak) for 60 min, while wearing a different upper‐body garment: cotton t‐shirt, t‐shirt with sweat‐wicking fabric, compression t‐shirt, and t‐shirt with aluminum dots lining the inside of the upper back of the garment. Running speed was adjusted to elicit the predetermined oxygen consumption associated with 70% V̇O2peak. Physiological (core and skin temperatures, total body water loss, and urine specific gravity) and perceptual (thermal comfort and sensation, ratings of perceived exertion, and garment cooling functionality) parameters along with running speed at 70% V̇O2peak were continuously recorded. Results: No significant differences were observed between the four garments for running speed at 70% V̇O2peak, physiological heat strain, and perceptual responses (all p > 0.05). The tested athletes reported larger areas of perceived suboptimal cooling functionality in the cotton t‐shirt and the t‐shirt with aluminum dots relative to the sweat‐wicking and compression t‐shirts (d: 0.43–0.52). Conclusion: There were not differences among the tested garments regarding running speed at 70% V̇O2peak, physiological heat strain, and perceptual responses in well‐trained and national‐level endurance athletes exercising in moderate heat. [ABSTRACT FROM AUTHOR]

Athletes report poor breast/bra knowledge, breast pain, sports bras causing lacerations and chafing, negatively affecting sports performance. No bra interventions to address these issues are reported. Working with 142 UK female athletes preparing for Tokyo Olympics/Paralympics (27 sports), this multi-phase intervention assessed breast/bra knowledge, preferences, issues via surveys and breast/bra assessments. Data were used to develop two sports bras. A total of 112 athletes were prescribed one of the new bras through individual assessments. After four weeks, wear athletes completed evaluations. Pre-intervention breast/bra knowledge was low (83% ≤average), multiple breast/bra issues were reported and most athletes wore ill-fitting, loose bras, offering limited support. Post-intervention, 63% reported improved knowledge and 97% reported their prescribed bra as better than their original bra. Eighty-seven per cent reported benefitting from this intervention, with 17% reporting improved performance. This intervention effectively assessed sports bra needs, developed and implemented solutions, which improved knowledge and potentially performance for some UK athletes. [ABSTRACT FROM AUTHOR]

To date, limited research has examined how sports fans feel about the response by sportswear brands towards athletes who are paid to endorse their brand but also publicly engage in social and political activism. In addressing this shortfall, this article presents the views of 1,001 US sports fans, collected via an online survey from May 2021 to June 2021. Locating the findings within two prominent themes - social responsibility strategy and financial motives - two-thirds (66%) of the participants felt that sportswear brands had become more supportive of athletes publicly engaging in social and political activism, whilst one-third (34%) felt that little had changed from what athletes faced in previous generations. The article concludes by outlining that as athlete activism becomes more prominent in the US, both inside sports arenas and on social media platforms, the social responsibility strategy of sportswear brands will become an even more important feature in the consumer culture of US sports fans. [ABSTRACT FROM AUTHOR]

Compression sportswear is specialized clothing chiefly designed for the athletes muscle fatigue reduction. Compression stockings are widely used in sportswear to support muscles and control excessive body vibrations. Compression/interface pressure between the wearer and stocking's surface is considerable in compression sportswear efficacy. However, thermo-physiological comfort is also influential while preparing summer sportswear. The research investigates the effect of fibers type and the inlay yarns number of covering filaments on compression, air permeability, water vapor permeability, and thermal resistance of sportswear compression stockings. Three different fibers, sorbtek (channelized polyester), nylon 6, and micro Nylon (polyamide-6), have been used as main yarns. Also, three distinct levels of covering yarn number of filaments have been utilized. Data have been statistically analyzed using full factorial design of experiment and regression analysis to predict fiber type and the number of covering yarn filaments for achieving desired comfort properties without compromising compression characteristics. [ABSTRACT FROM AUTHOR]

Nowadays, more and more articles for sportswear, but not only, include elastane yarns. Stretch clothing plays an important role in optimizing the performance of the wearer by providing freedom of movement, maximizing comfort, minimizing the risk of injury, and reducing friction. This study aimed to investigate the fabric moisture management properties with dependency on elastane yarn linear density. Experiments were conducted with two series of plated knitted fabrics. The ground yarns were: 30% Outlast®Viscose / 70% Cotton, 14.75 tex, and a Dacron® 702 WSD 1.7/38, 14.30 tex (Coolmax®). The plating yarns were 22 dtex, 44 dtex, and 77 dtex Creora®, plated at every feeder by using the electronic feeder. The Outlast®/Cotton material is superior in water vapour transmission and Colmax® in drying capacity, regardless of the fineness of the elastane yarn. In terms of liquid water management, correctly selecting the appropriate linear density of elastane yarn can optimize the functionality of sportswear. [ABSTRACT FROM AUTHOR]

Compression sportswear is widely used for enhancing exercise performances, facilitating recovery, and preventing injuries. Despite prior findings that confirmed positive effects on physical recovery after exercises, whether compression sportswear can enhance exercise performances has not been determined. Thus, this systematic meta-analysis examined the effects of compression sportswear on exercise performances including speed, endurance, strength and power, functional motor performance, and sport-related performance. We calculated effect sizes by comparing changes in exercise performances between the compression garment and the control group. Two additional moderator variable analyses determined whether altered exercise performances were different based on the types of participants and compression sportswear. For the total 769 participants from 42 included studies, the random-effect model found that compression sportswear significantly improved speed, endurance, and functional motor performances. Additional moderator variable analyses identified significant positive effects on speed for athletes, and endurance and functional motor performance for moderately trained adults. Further, whole-body compression garments were beneficial for improving speed, and lower-body compression garments effectively advanced endurance performances. For functional motor performances, both upper- and lower-body suits were effective. These findings suggest that wearing compression sportswear may be a viable strategy to enhance overall exercise performances. [ABSTRACT FROM AUTHOR]

The human body is a complex system that can be disrupted by various types of infections and viruses, and body temperature is a major contributor to these problems. To prevent this, doctors recommend comfortable clothing made from good fabric. This paper proposes a model that can be used to analyze how different types of fabric impact the thermal profile of skin layers during and after physical activity. The information gained from this model could be useful in designing exercise apparel for different climates and in generating thermal stress protocols for treating infections and providing physical activity guidelines for healthy living. The model uses Pennes' bio-heat equation and finite difference method to examine the temperature distribution in skin layers while accounting for both physiological and clothing parameters. The numerical findings were compared to existing studies, and the model's accuracy was found to be in good agreement with previous research. The proposed model can be used to predict how much rest and acclimation are needed to cope with thermal stress and could also be modified to obtain thermal information for patients with skin diseases. Additionally, the thermal profile obtained from this model could be helpful in designing exercise clothes for patients with skin diseases. [ABSTRACT FROM AUTHOR]

In order to meet the functional requirements of professional skiers for ski underwear, such as warmth, breathability, moisture absorption, sweat drainage, and stretch elasticity, six single-sided jacquard knit fabric structures were designed and then knitted with polyester and DRYARN. Then, 12 fabrics were acquired and ranked comprehensively by the one-way analysis of variance and grey correlative analysis based on entropy. According to the fabric properties and sweat distribution on the human skin surface, the professional ski underwear was zoning designed and the wearing experiment and evaluation were carried out on the "Newton" sweated manikin system. The analysis results show that the fabric with DRYARN® material has better air permeability and moisture permeability. Thermal resistance, Clo value, and permeability play important roles in comprehensive evaluation. The results of wearing experiment show that the seamless professional ski underwear woven based on body mapping sportswear has superior function and reasonable design, which can provide technical support for the design of professional seamless ski underwear. [ABSTRACT FROM AUTHOR]

In response to the problem of muscle and other parts injury caused by compensatory phenomenon in strength training of novice trainers in the field of fitness, a fitness clothing with good comfort and avoiding compensatory parts injury was designed. The comfort fabric combined with the flexible sensor design enables the monitoring of the parts that are prone to injury due to compensatory problems, and the stimulation of the correct training parts of the trainer's body using the electromyographic stimulation technology (EMS) to improve athletic performance. The research shows that the design can prevent and reduce the compensation problem of novice trainers by means of intelligent detection and myoelectric stimulation, avoid muscle injury, and guide trainers to carry out sports training safely and efficiently, which is of great significance for the research of intelligent sportswear. [ABSTRACT FROM AUTHOR]

Context: Warming up in very cold climates and maintaining an elevated body temperature prior to a race is challenging for snow-sport athletes. Purpose: To investigate the effects of active (ACT), passive (PAS), and a combination of ACT and PAS (COM) warm-ups on maximal physical performance in a subzero environment among snow-sport athletes. Methods: Ten junior alpine skiers completed 3 experimental trials in −7.2 (0.2)°C. The ACT involved 5 minutes of moderate cycling, 3 × 15-second accelerations, a 6-second sprint, 5 countermovement jumps (CMJs), and a 10-minute passive transition phase, while in PAS, participants wore a lower-body heated garment for 24 minutes. In COM, participants completed the active warm-up, then wore the heated garment during the transition phase. Two maximal CMJs and a 90-second maximal isokinetic cycling test followed the warm-up. Results: CMJ performance was likely (P =.150) and very likely (P =.013) greater in ACT and COM, respectively, versus PAS. Average power output during the cycling test was likely (P =.074) greater in ACT and COM versus PAS. Participants felt likely to almost certainly warmer (P <.01) and more comfortable (P =.161) during ACT and COM versus PAS. In addition, participants felt likely warmer (P =.136) and very likely more comfortable (P =.161) in COM versus ACT. Conclusions: COM resulted in significantly improved CMJ performance versus PAS while both ACT and COM led to likely improved 90-second cycling performance. Participants felt significantly warmer during ACT and COM versus PAS and likely warmer in COM versus ACT. Therefore, a combined warm-up is recommended for alpine skiers performing in subzero temperatures. [ABSTRACT FROM AUTHOR]