PDF(Pubmed)
Abstract：
Physiologic hand tremors are a critical factor affecting the aim of air pistol shooters. However, the extent of the effect of hand tremors on shooting performance is unclear. In this study, we aim to explore the relationship between hand tremors and shooting performance scores as well as investigate potential links between muscle activation and hand tremors. In this study, 17 male air pistol shooters from China\'s national team and the Air Pistol Sports Center were divided into two groups: the elite group and the sub-elite group. Each participant completed 40 shots during the experiment, with shooters\' hand tremors recorded using three-axis digital accelerometers affixed to their right hands. Muscle activation was recorded using surface electromyography on the right anterior deltoid, posterior deltoid, biceps brachii (short head), triceps brachii (long head), flexor carpi radialis, and extensor carpi radialis. Our analysis revealed weak correlations between shooting scores and hand tremor amplitude in multiple directions (middle-lateral, ML: r2 = -0.22, p < 0.001; vertical, VT: r2 = -0.25, p < 0.001), as well as between shooting scores and hand tremor complexity (ML: r2 = -0.26, p < 0.001; VT: r2 = -0.28, p < 0.001), across all participants. Notably, weak correlations between shooting scores and hand tremor amplitude (ML: r2 = -0.27, p < 0.001; VT: r2 = -0.33, p < 0.001) and complexity (ML: r2 = -0.31, p < 0.001) were observed in the elite group but not in the sub-elite group. Moderate correlation were found between the biceps brachii (short head) RMS and hand tremor amplitude in the VT and ML directions (ML: r2 = 0.49, p = 0.010; VT: r2 = 0.44, p = 0.025) in all shooters, with a moderate correlation in the ML direction in elite shooters (ML: r2 = 0.49, p = 0.034). Our results suggest that hand tremors in air pistol shooters are associated with the skill of the shooters, and muscle activation of the biceps brachii (long head) might be a factor affecting hand tremors. By balancing the agonist and antagonist muscles of the shoulder joint, shooters might potentially reduce hand tremors and improve their shooting scores.
摘要：
生理性手震颤是影响气手枪射击目标的关键因素。然而,手震颤对射击表现的影响程度尚不清楚。在这项研究中,我们的目的是探讨手震颤与射击成绩之间的关系，以及探讨肌肉激活与手震颤之间的潜在联系。在这项研究中,来自中国国家队和空中手枪体育中心的17名男性空中手枪射手被分为两组：精英组和亚精英组。每个参与者在实验过程中完成40次射击，射手的手颤抖记录使用三轴数字加速度计贴在他们的右手。右前三角肌表面肌电图记录肌肉激活，后三角肌,肱二头肌（短头），肱三头肌（长头），径向腕屈肌，和桡侧腕骨伸肌。我们的分析显示，射击得分与多个方向的手震颤幅度之间的相关性较弱（中外侧，ML：r2=-0.22，p<0.001；垂直，VT：r2=-0.25，p<0.001），以及在射击得分和手震颤复杂性之间（ML：r2=-0.26，p<0.001；VT：r2=-0.28，p<0.001），在所有参与者中。值得注意的是,在精英组中观察到射击得分与手震颤幅度之间的弱相关性（ML：r2=-0.27，p<0.001；VT：r2=-0.33，p<0.001）和复杂性（ML：r2=-0.31，p<0.001），而在亚精英组中没有。在所有射手中，肱二头肌（短头）RMS与VT和ML方向的手震颤幅度之间存在中等相关性（ML：r2=0.49，p=0.010；VT：r2=0.44，p=0.025），精英射手在ML方向上具有中等相关性（ML：r2=0.49，p=0.034）。我们的结果表明，空气手枪射手的手颤抖与射手的技能有关，肱二头肌（长头）的肌肉激活可能是影响手震颤的一个因素。通过平衡肩关节的激动剂和拮抗剂肌肉，射手可能会减少手的颤抖和提高他们的射击得分。
