{"title":"现实生活中的古怪骑行：用无刹车自行车骑行下坡的案例报告。","authors":"Nicolas Babault, Carole Cometti","doi":"10.5114/jhk/193941","DOIUrl":null,"url":null,"abstract":"<p><p>This case study aimed to explore neuromuscular strategies used by a cyclist to control the speed while riding downhill a mountain with a brakeless, fixed-gear bicycle. Accelerations of the pedals and electromyographic activity of four lower limb muscles were registered to determine muscle activation during two decelerating strategies. Eccentric cycling was mostly used to control the bicycle speed with short (536 ± 51 ms) and low-intensity contractions. Isometric pedaling cycles were more efficient for decelerations with long (1,092 ± 281 ms) and intensive contractions. Isometric muscle activation was 122, 31, 25 and 44% greater than eccentric for vastus lateralis, biceps femoris, gastrocnemius lateralis and tibialis anterior muscle, respectively. This study suggests specific activation patterns to help the practitioner for safety rides, but that could have implications for rehabilitation purposes.</p>","PeriodicalId":16055,"journal":{"name":"Journal of Human Kinetics","volume":"97 ","pages":"5-11"},"PeriodicalIF":1.9000,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12127934/pdf/","citationCount":"0","resultStr":"{\"title\":\"Eccentric Cycling in the Real Life: A Case Report Exploring Riding Downhill with a Brakeless Bicycle.\",\"authors\":\"Nicolas Babault, Carole Cometti\",\"doi\":\"10.5114/jhk/193941\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>This case study aimed to explore neuromuscular strategies used by a cyclist to control the speed while riding downhill a mountain with a brakeless, fixed-gear bicycle. Accelerations of the pedals and electromyographic activity of four lower limb muscles were registered to determine muscle activation during two decelerating strategies. Eccentric cycling was mostly used to control the bicycle speed with short (536 ± 51 ms) and low-intensity contractions. Isometric pedaling cycles were more efficient for decelerations with long (1,092 ± 281 ms) and intensive contractions. Isometric muscle activation was 122, 31, 25 and 44% greater than eccentric for vastus lateralis, biceps femoris, gastrocnemius lateralis and tibialis anterior muscle, respectively. This study suggests specific activation patterns to help the practitioner for safety rides, but that could have implications for rehabilitation purposes.</p>\",\"PeriodicalId\":16055,\"journal\":{\"name\":\"Journal of Human Kinetics\",\"volume\":\"97 \",\"pages\":\"5-11\"},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-12-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12127934/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Human Kinetics\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.5114/jhk/193941\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2025/4/1 0:00:00\",\"PubModel\":\"eCollection\",\"JCR\":\"Q2\",\"JCRName\":\"SPORT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Human Kinetics","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.5114/jhk/193941","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/4/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"SPORT SCIENCES","Score":null,"Total":0}
Eccentric Cycling in the Real Life: A Case Report Exploring Riding Downhill with a Brakeless Bicycle.
This case study aimed to explore neuromuscular strategies used by a cyclist to control the speed while riding downhill a mountain with a brakeless, fixed-gear bicycle. Accelerations of the pedals and electromyographic activity of four lower limb muscles were registered to determine muscle activation during two decelerating strategies. Eccentric cycling was mostly used to control the bicycle speed with short (536 ± 51 ms) and low-intensity contractions. Isometric pedaling cycles were more efficient for decelerations with long (1,092 ± 281 ms) and intensive contractions. Isometric muscle activation was 122, 31, 25 and 44% greater than eccentric for vastus lateralis, biceps femoris, gastrocnemius lateralis and tibialis anterior muscle, respectively. This study suggests specific activation patterns to help the practitioner for safety rides, but that could have implications for rehabilitation purposes.
期刊介绍：
The Journal of Human Kinetics is an open access interdisciplinary periodical offering the latest research in the science of human movement studies. This comprehensive professional journal features articles and research notes encompassing such topic areas as: Kinesiology, Exercise Physiology and Nutrition, Sports Training and Behavioural Sciences in Sport, but especially considering elite and competitive aspects of sport.
The journal publishes original papers, invited reviews, short communications and letters to the Editors. Manuscripts submitted to the journal must contain novel data on theoretical or experimental research or on practical applications in the field of sport sciences.
The Journal of Human Kinetics is published in March, June, September and December.
We encourage scientists from around the world to submit their papers to our periodical.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
