The relationship between asymmetric characteristics of muscle thickness and ball speed in baseball pitchers
The relationship between asymmetric characteristics of muscle thickness and ball speed in baseball pitchers
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棒球投手肌肉厚度不对称特征与球速的关系
DOI：
10.7600/jspfsm.61.227
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发表时间：
2012
影响因子：
--
通讯作者：
T. Ono
中科院分区：
文献类型：
--
作者：
S. Hasegawa;T. Ono
本研究的主要目的是调查棒球投手是否因重复投球而出现上肢、躯干和下肢肌肉厚度(MT)的不对称特征。本研究的第二个目的是调查MT与球速的关系。26名大学棒球投手参与了这项研究。我们选择了26个位点来量化MT的不对称特征。用B型超声测量MT。用雷达枪测量的球速被用来量化投球表现。优势侧(俯仰侧)前臂、肩胛骨、胸部MT显著大于非优势侧，腹部、侧腹、大腿前部MT非优势侧显著大于优势侧。两侧前臂MT、优势侧侧腹MT与球速呈显著正相关。这些结果表明，重复投球导致棒球投手上肢、躯干和下肢肌肉厚度不对称，前臂和侧腹的MT与球速有关。Jpn J Phys Fitness Sports Med，61(2)：227-235(2012)
The primary purpose of this study was to investigate whether the baseball pitchers have asymmetric characteristics of muscle thickness (MT) in upper extremities, trunk, and lower extremities because of repetitive pitching. The secondary purpose of this study was to investigate the relationship between MT and ball speed. Twenty-six college baseball pitchers participated in this study. Twenty-six sites were selected to quantify the asymmetric characteristics of MT. The MT was measured by a B-mode ultrasound. The ball speed, measured by a radar gun, was used to quantify the pitching performance. The MT of forearm, subscapula, and chest in dominant side (pitching side) were significantly greater than those in nondominant side, and the MT of abdomen, lateral abdomen, and anterior thigh in nondominant side were significantly greater than those in dominant side. On the other hand, the MT of forearm in both sides and the MT of lateral abdomen in dominant side were significantly and positively correlated with ball speed. These results suggest that asymmetric muscle thickness in upper extremity, trunk, and lower extremity in baseball pitchers resulted from repetitive pitching, and the MT of forearm and lateral abdomen are related to the ball speed. Jpn J Phys Fitness Sports Med, 61(2): 227-235 (2012)