Alizadeh Ebadi Leyla, Çetin Ebru
Sports Sciences Faculty, Gazi University, 06560 Ankara, Turkey.
Sports (Basel). 2018 Mar 13;6(1):24. doi: 10.3390/sports6010024.
The aim of this study was to determine the acute effect of static stretching on hamstring and quadriceps muscles' isokinetic strength when applied for various durations to elite athletes, to investigate the effect of different static stretching durations on isokinetic strength, and finally to determine the optimal stretching duration. Fifteen elite male athletes from two different sport branches (10 football and five basketball) participated in this study. Experimental protocol was designed as 17 repetitive static stretching exercises for hamstring and quadriceps muscle groups according to the indicated experimental protocols; ((A) 5 min jogging; (B) 5 min jogging followed by 15 s static stretching; (C) 5 min jogging followed by 30 s static stretching; (D) 5 min jogging, followed by static stretching for 45 s). Immediately after each protocol, an isokinetic strength test consisting of five repetitions at 60°/s speed and 20 repetitions at 180°/s speed was recorded for the right leg by the Isomed 2000 device. Friedman variance analysis test was employed for data analysis. According to the analyzes, it was observed that 5 min jogging and 15 s stretching exercises increased the isokinetic strength, whereas 30 and 45 s stretching exercises caused a decrease.
本研究的目的是确定对精英运动员进行不同时长的静态拉伸时，其对腘绳肌和股四头肌等速肌力的急性影响，探究不同静态拉伸时长对等速肌力的影响，并最终确定最佳拉伸时长。来自两个不同体育项目（10名足球运动员和5名篮球运动员）的15名精英男性运动员参与了本研究。实验方案设计为根据指定的实验方案对腘绳肌和股四头肌肌群进行17次重复的静态拉伸练习；（（A）5分钟慢跑；（B）5分钟慢跑后进行15秒静态拉伸；（C）5分钟慢跑后进行30秒静态拉伸；（D）5分钟慢跑，随后进行45秒静态拉伸）。每个方案结束后，立即使用Isomed 2000设备对右腿进行等速肌力测试，记录以60°/秒速度进行5次重复和以180°/秒速度进行20次重复的测试结果。采用弗里德曼方差分析检验进行数据分析。根据分析结果，观察到5分钟慢跑和15秒拉伸练习增加了等速肌力，而30秒和45秒拉伸练习则导致等速肌力下降。
