Department of Biomechanics, Poznan University of Physical Education, Poznan, Poland.
Sports Biomech. 2022 Oct;21(9):1082-1092. doi: 10.1080/14763141.2020.1726996. Epub 2020 Mar 6.
In sweep rowers, the lower extremities muscle strength translates into the driving force of the boat. Therefore, isokinetic assessment of muscle torque is used by coaches as an indicator of the level of athletes' preparation for competitions. A total of 22 elite sweep rowers performed an isokinetic test of knee joint flexors and extensors, and a test on an asymmetric ergometer with the electromyography measures. Significantly higher quadriceps peak torque was shown during the beginning than the end of the preparatory period ( < 0.05). However, there was no significant knee peak torque difference between the lower extremities ( = 0.398). In the case of the electromyography test of quadriceps, hamstrings and lumbar erector spinae, analysis demonstrated significant bioelectrical activity differences between the sides ( < 0.05). Lower values of quadriceps peak torque at the end of the preparatory period may result from a decrease in the number of power training units during the entire preparatory period. A similar muscle strength between both lower extremities seems to be the correct result in the context of injury prevention. In turn, significant bioelectrical activity differences between the sides possibly are associated with the asymmetric movement pattern in sweep rowers.
在单桨划船运动员中，下肢肌肉力量转化为划船的驱动力。因此，教练将等速评估肌肉扭矩用作运动员比赛准备水平的指标。共有 22 名精英单桨划船运动员进行了膝关节屈伸肌的等速测试，以及带有肌电图测量的不对称测功计测试。在准备期的开始阶段，股四头肌的峰值扭矩明显高于结束阶段（<0.05）。然而，下肢的膝关节峰值扭矩没有显著差异（=0.398）。在股四头肌、腘绳肌和竖脊肌的肌电图测试中，分析显示两侧的生物电活动存在显著差异（<0.05）。在准备期结束时股四头肌峰值扭矩较低，可能是由于整个准备期内力量训练单元的数量减少所致。在预防受伤的背景下，下肢之间似乎存在相似的肌肉力量，这似乎是正确的结果。相反，两侧之间的显著生物电活动差异可能与单桨划船的不对称运动模式有关。
