Sangnier S, Tourny-Chollet C
C.E.T.A.P.S. Laboratory UPRES EA 3832, University of Rouen, Faculty of Sports Sciences, Mont Saint Aignan, France.
Int J Sports Med. 2007 Nov;28(11):952-7. doi: 10.1055/s-2007-964981. Epub 2007 May 11.
An imbalance in the agonist/antagonist ratio has been identified as a pathologic factor. Using an isokinetic dynamometer, several studies have investigated the loss of quadriceps strength due to fatigue, but few have explored this phenomenon in the hamstrings. This study assessed the decline in strength of the hamstring and quadriceps muscles with fatigue. The goal was to determine whether a divergence in the decline in strength occurs that would affect the hamstring to quadriceps ratio of endurance. Twenty-seven professional soccer players were selected for endurance testing to evaluate fatigue on an isokinetic dynamometer. The decline in hamstring strength was significantly greater than that of the quadriceps after 15 repetitions for the dominant leg and after 40 repetitions for the nondominant leg. This study also revealed a decline in the endurance ratio compared with the maximal strength ratio in the dominant leg after 30 repetitions. In fatigue states, the decline in hamstring strength diverges from that of the quadriceps in both legs. This difference in resistance to fatigue provokes an imbalance that may affect the stabilizing function of the thigh muscles. These results can be considered as indicators of an increased risk of injury during exhausting effort.
激动剂/拮抗剂比例失衡已被确定为一个病理因素。使用等速测力计，多项研究调查了因疲劳导致的股四头肌力量损失，但很少有研究探讨腘绳肌的这种现象。本研究评估了腘绳肌和股四头肌随疲劳出现的力量下降情况。目的是确定力量下降是否存在差异，这会影响腘绳肌与股四头肌的耐力比例。选取27名职业足球运动员进行耐力测试，以通过等速测力计评估疲劳情况。优势腿进行15次重复动作后以及非优势腿进行40次重复动作后，腘绳肌力量的下降明显大于股四头肌。本研究还显示，优势腿进行30次重复动作后，耐力比例相较于最大力量比例有所下降。在疲劳状态下，双腿的腘绳肌力量下降与股四头肌不同。这种对疲劳抵抗力的差异会引发失衡，可能影响大腿肌肉的稳定功能。这些结果可被视为在疲劳运动期间受伤风险增加的指标。
