Busuttil Nicholas A, Reid Machar, Connolly Molly, Dascombe Ben J, Middleton Kane J
School of Allied Health, Human Services, and Sport, La Trobe University, Melbourne, Australia.
Game Insight Group, Tennis Australia, Melbourne, Australia.
Sports Biomech. 2022 Oct;21(9):1046-1064. doi: 10.1080/14763141.2020.1726994. Epub 2020 Mar 6.
The purpose of this study was to compare double-handed backhand kinematics of the non-dominant wrist of tennis players using either an eastern or continental grip position with the non-dominant hand. Trajectory data were captured using sixty reflective markers on sixteen sub-elite right-handed tennis players using a 12-camera VICON motion capture system (250 Hz). Participants executed double-handed backhands using two non-dominant grip positions (Eastern [E] and Continental [C]), aiming for two crosscourt zones (Deep [D] and Short [S]), totalling to four conditions (ED, CD, ES and CS). Three successful attempts from each condition were selected for analysis. The eastern grip demonstrated faster horizontal racket head velocity compared to the continental grip. However, no differences were observed in accuracy or spin rate between grips ( > 0.05). In the non-dominant upper limb, elbow flexion was smaller in the continental condition throughout the swing, whilst wrist extension and ulnar deviation was larger. Collectively, these data suggest that the continental grip may place the wrist in a position vulnerable to overuse injury. Future research into the kinetics of the double-handed backhand would help better understand the onset of ulnar-side wrist pain in tennis.
本研究的目的是比较网球运动员非优势手采用东方式或大陆式握拍法时非优势手腕的双手反手运动学特征。使用12台摄像机的VICON动作捕捉系统（250Hz），对16名次精英右手网球运动员的60个反光标记进行轨迹数据采集。参与者使用两种非优势手握拍位置（东方式[E]和大陆式[C]）进行双手反手击球，目标是两个斜线区域（深区[D]和浅区[S]），共四种情况（ED、CD、ES和CS）。从每种情况中选取三次成功的尝试进行分析。与大陆式握拍相比，东方式握拍的拍头水平速度更快。然而，两种握拍法在准确性或旋转速度上没有差异（P>0.05）。在非优势上肢中，大陆式握拍情况下整个挥拍过程中的肘部屈曲较小，而手腕伸展和尺侧偏斜较大。总体而言，这些数据表明大陆式握拍可能会使手腕处于易发生过度使用损伤的位置。未来对双手反手动力学的研究将有助于更好地理解网球运动中尺侧腕部疼痛的发病机制。
