Martin Caroline, Bideau Benoit, Delamarche Paul, Kulpa Richard
M2S Laboratory, UFR APS, University of Rennes 2 - ENS de Rennes, Campus de Ker Lann, Avenue Robert Schuman, 35170, Bruz, France.
PLoS One. 2016 Aug 17;11(8):e0159979. doi: 10.1371/journal.pone.0159979. eCollection 2016.
The aim of this study was to quantify kinematic, kinetic and performance changes that occur in the serve throughout a prolonged tennis match play. Serves of eight male advanced tennis players were recorded with a motion capture system before, at mid-match, and after a 3-hour tennis match. Before and after each match, electromyographic data of 8 upper limb muscles obtained during isometric maximal voluntary contraction were compared to determine the presence of muscular fatigue. Vertical ground reaction forces, rating of perceived exertion, ball speed, and ball impact height were measured. Kinematic and upper limb kinetic variables were computed. The results show decrease in mean power frequency values for several upper limb muscles that is an indicator of local muscular fatigue. Decreases in serve ball speed, ball impact height, maximal angular velocities and an increase in rating of perceived exertion were also observed between the beginning and the end of the match. With fatigue, the majority of the upper limb joint kinetics decreases at the end of the match. No change in timing of maximal angular velocities was observed between the beginning and the end of the match. A prolonged tennis match play may induce fatigue in upper limb muscles, which decrease performance and cause changes in serve maximal angular velocities and joint kinetics. The consistency in timing of maximal angular velocities suggests that advanced tennis players are able to maintain the temporal pattern of their serve technique, in spite of the muscular fatigue development.
本研究的目的是量化在一场长时间的网球比赛中发球过程中发生的运动学、动力学和性能变化。在一场3小时的网球比赛前、比赛进行到一半时以及比赛结束后,使用动作捕捉系统记录了8名男性高级网球运动员的发球情况。在每场比赛前后,比较了在等长最大自主收缩过程中获得的8块上肢肌肉的肌电图数据,以确定肌肉疲劳的存在。测量了垂直地面反作用力、主观用力程度评分、球速和球的击球高度。计算了运动学和上肢动力学变量。结果显示,几块上肢肌肉的平均功率频率值下降,这是局部肌肉疲劳的一个指标。在比赛开始和结束之间,还观察到发球球速、球的击球高度、最大角速度下降,主观用力程度评分增加。随着疲劳的出现,比赛结束时大多数上肢关节动力学指标下降。在比赛开始和结束之间,未观察到最大角速度时间的变化。一场长时间的网球比赛可能会导致上肢肌肉疲劳,从而降低性能,并导致发球最大角速度和关节动力学发生变化。最大角速度时间的一致性表明,尽管出现了肌肉疲劳,但高级网球运动员仍能够保持其发球技术的时间模式。
PLoS One. 2016-8-17
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