Skof Branko, Strojnik Vojko
Laboratory of Biomechanics, University of Ljubljana, Faculty of Sport, Ljubljana, Slovenia.
J Strength Cond Res. 2007 May;21(2):394-9. doi: 10.1519/R-18055.1.
The objective of this study was to determine the effect of 2 different warm-up protocols on the neuromuscular system of well-trained middle distance runners. Seven runners performed 2 different warm-up protocols, one of which included slow running, stretching, and bounding and sprinting exercises, while the other consisted of slow running and stretching only. Before and after warm-up, contractile properties of the vastus lateralis and quadriceps femoris were monitored with a single twitch test, maximal torque, and the level of muscle activation during maximal voluntary extension. The 2 types of warm-up protocols showed statistically significant differences in the increase of peak knee extension torque and muscle activation level. After warm-up 1 maximal twitch torque was increased and twitch contraction time (CT) was shortened. Both maximal torque and the level of activation were increased. Parameter changes after warm-up 2 were similar to those after warm-up 1 but not statistically significant. Sprinting and bounding as part of athletes' warm-up improve muscle activation.
本研究的目的是确定两种不同的热身方案对训练有素的中长跑运动员神经肌肉系统的影响。七名跑步运动员进行了两种不同的热身方案，其中一种包括慢跑、拉伸以及跳跃和冲刺练习，而另一种仅包括慢跑和拉伸。在热身前后，通过单次抽搐测试、最大扭矩以及最大自主伸展期间的肌肉激活水平来监测股外侧肌和股四头肌的收缩特性。两种热身方案在膝关节伸展峰值扭矩增加和肌肉激活水平方面显示出统计学上的显著差异。在热身1后，最大抽搐扭矩增加，抽搐收缩时间（CT）缩短。最大扭矩和激活水平均增加。热身2后的参数变化与热身1后的相似，但无统计学意义。作为运动员热身一部分的冲刺和跳跃可改善肌肉激活。
