Department of Sport, Health and Exercise Science, University of Hull, Cottingham Road, Hull, England, United Kingdom.
J Sci Med Sport. 2010 Jan;13(1):120-5. doi: 10.1016/j.jsams.2008.08.005. Epub 2008 Oct 30.
The purpose of this work was to investigate the effect of multidirectional soccer-specific fatigue on hamstring muscle strength and angle of peak torque. Sixteen male semi-professional soccer players (mean+/-S.D.: age: 21.3+/-2.9 years; height 185.0+/-8.7 cm; body mass 81.6+/-6.7 kg) completed the SAFT(90), a multidirectional, intermittent 90-min exercise protocol based on data from English Championship soccer matches. Prior to exercise (t(0)), at half-time (t(45)) and post-exercise (t(105)), subjects performed three maximal dominant limb isokinetic contractions (Biodex, System 3) at 120 degrees s(-1) through a 90 degrees range for concentric and eccentric knee flexors and concentric knee extensors. Analysis of variance revealed significant time dependant reductions in gravity corrected eccentric hamstring peak torque, and consequently in the functional hamstring:quadriceps ratio (P<0.01). Eccentric hamstring peak torque decreased significantly during each half (t(0): 272.0+/-43.2; t(45): 240.4+/-43.3; t(105): 226.3+/-45.7 Nm). The functional hamstring:quadriceps ratio also decreased significantly during each half (t(0): 116.6+/-21.2; t(45): 107.1+/-17.6; t(105): 98.8+/-20.3%). There were no significant changes in concentric hamstring or quadriceps peak torque observed during SAFT(90) (P>0.05). Data analysis also revealed significant differences for Angle of Peak Torque for eccentric hamstrings (P<0.05) which was significantly higher at the end of each half (t(45): 37+/-15; t(105): 38+/-18 degrees ) than the pre-exercise value (t(0): 28+/-12 degrees ). There was a time dependant decrease in peak eccentric hamstring torque and in the functional strength ratio which may have implications for the increased predisposition to hamstring strain injury during the latter stages of match-play.
本研究旨在探讨多向性足球专项疲劳对腘绳肌肌力和峰值扭矩角度的影响。16 名男性半职业足球运动员（均值+/-标准差：年龄 21.3+/-2.9 岁；身高 185.0+/-8.7cm；体重 81.6+/-6.7kg）完成了基于英格兰足球冠军联赛数据的多向性、间歇性 90 分钟运动方案 SAFT(90)。在运动前（t(0)）、中场休息时（t(45)）和运动后（t(105)），受试者在 120°/s 的速度下进行三次最大主导侧肢体等速收缩（Biodex，System 3），运动范围为 90°，用于向心和离心膝关节屈肌以及向心膝关节伸肌。方差分析显示，重力校正后的离心腘绳肌峰值扭矩以及功能性腘绳肌/四头肌比值显著随时间减少（P<0.01）。在每个半场中，离心腘绳肌峰值扭矩均显著降低（t(0)：272.0+/-43.2；t(45)：240.4+/-43.3；t(105)：226.3+/-45.7Nm）。在每个半场中，功能性腘绳肌/四头肌比值也显著降低（t(0)：116.6+/-21.2；t(45)：107.1+/-17.6；t(105)：98.8+/-20.3%）。在 SAFT(90)期间，观察到向心腘绳肌或四头肌峰值扭矩没有显著变化（P>0.05）。数据分析还显示，离心腘绳肌的峰值扭矩角度也存在显著差异（P<0.05），在每个半场结束时（t(45)：37+/-15；t(105)：38+/-18°）显著高于运动前（t(0)：28+/-12°）。在运动过程中，峰值离心腘绳肌扭矩和功能性力量比值均呈下降趋势，这可能导致在比赛后期更容易发生腘绳肌拉伤。
