Department of Sport and Exercise Science, University of Auckland, Auckland, New Zealand.
J Sports Sci. 2011 Sep;29(12):1293-300. doi: 10.1080/02640414.2011.591417. Epub 2011 Jul 13.
The purpose of this study was to discover the contributions of individual upper body segmental rotations to ball release speed for cricket bowling and determine whether attempting to forcefully flex the lower trunk leads to an increase in ball release speed and bowling accuracy. Three dimensional kinematic data of eight male fast bowlers were recorded by a Vicon motion capture system under three cricket bowling conditions: (1) participants bowled at their stock delivery speeds (sub-max condition), (2) participants bowled at their absolute maximal speeds (max condition), and (3) participants bowled at their absolute maximal speeds but forced to flex the lower trunk (max-trunk condition). The accuracy of each delivery was also measured. The results showed that the average ball release speeds for the max-trunk condition were faster than the other two conditions. A general pattern of proximal to distal sequencing was observed for all three conditions. There was a slight decrement in accuracy seen in the max-trunk condition with respect to the other two conditions. For all three conditions, the upper arm rotation made the largest contribution, followed in turn by torso and thorax rotation, pelvis rotation, linear velocity of pelvis, and forearm and hand rotation.
本研究旨在探究个体上半身节段旋转对板球投球中球速释放的贡献，并确定是否强行弯曲下躯干会导致球速释放和投球准确性的提高。通过 Vicon 运动捕捉系统记录了 8 名男性快速投球手在三种板球投球条件下的三维运动学数据：（1）参与者以其投球速度（次最大条件）投球，（2）参与者以其绝对最大速度（最大条件）投球，和（3）参与者以其绝对最大速度但被迫弯曲下躯干（最大躯干条件）投球。还测量了每次投球的准确性。结果表明，最大躯干条件下的平均球速释放速度快于其他两种条件。在所有三种条件下都观察到从近端到远端的顺序的一般模式。与其他两种条件相比，最大躯干条件下的准确性略有下降。对于所有三种情况，上臂旋转的贡献最大，其次是躯干和胸部旋转、骨盆旋转、骨盆线性速度以及前臂和手部旋转。
