Effects of flexibility and strength training on peak hamstring musculotendinous strains during sprinting  

作　　者：Xianglin Wan Shangxiao Li Thomas M.Best Hui Liu Hanjun Li Bing Yu 

机构地区：[1]Biomechanics Laboratory,Beijing Sport University,Beijing 100084,China [2]UHealth Sports Medicine Institute,University of Miami,Miami,FL 33136,USA [3]Center for Human Movement Science,University of North Carolina at Chapel Hill,Chapel Hill,NC 27599-7135,USA

出　　处：《Journal of Sport and Health Science》2021年第2期222-229,共8页运动与健康科学（英文）

基　　金：by a research grant from the National Natural Science Foundation of China(Grant No.81572212);the Fundamental Research Funds for the Central Universities of China(Grant No.2019PT015).

摘　　要：Background:Hamstring injury is one of the most common injuries in sports involving sprinting.Hamstring flexibility and strength are often considered to be modifiable risk factors in hamstring injury.Understanding the effects of hamstring flexibility or strength training on the biomechanics of the hamstring muscles during sprinting could assist in improving prevention strategies and rehabilitation related to these injuries.The purpose of this study was to determine the effects of altering hamstring flexibility or strength on peak hamstring musculotendinous strain during sprinting.Methods:A total of 20 male college students(aged 18-24 years)participated and were randomly assigned to either a flexibility intervention group or a strength intervention group.Each participant executed exercise training 3 times a week for 8 weeks.Flexibility,sprinting,and isokinetic strength testing were performed before and after the 2 interventions.Paired t tests were performed to determine hamstring flexibility or strength intervention effects on optimal hamstring musculotendinous lengths and peak hamstring musculotendinous strains during sprinting.Results:Participants in the flexibility intervention group significantly increased the optimal musculotendinous lengths of the semimembranosus and biceps long head(p<0.026)and decreased peak musculotendinous strains in all 3 bi-articulate hamstring muscles(p<0.004).Participants in the strength-intervention group significantly increased the optimal musculotendinous lengths of all 3 hamstring muscles(p<0.041)and significantly decreased their peak musculotendinous strain during sprinting(p<0.017).Conclusion:Increasing hamstring flexibility or strength through exercise training may assist in reducing the risk of hamstring injury during sprinting for recreational male athletes.

关 键 词：Hamstring injury Injury mechanism Injury prevention Modifiable risk factors Muscle biomechanics 

分 类 号：G822.1[文化科学—体育训练]