Spratford Wayne, Whiteside David, Elliott Bruce, Portus Marc, Brown Nicholas, Alderson Jacqueline
a University of Canberra Research Institute for Sport and Exercise (UCRISE), University of Canberra , ACT , Canberra , Australia.
b Discipline of Sport and Exercise Science, Faculty of Health , University of Canberra , ACT , Canberra , Australia.
J Sports Sci. 2018 Mar;36(6):651-659. doi: 10.1080/02640414.2017.1329547. Epub 2017 May 22.
Spin bowling plays a fundamental role within the game of cricket yet little is known about the initial ball kinematics in elite and pathway spin bowlers or their relationship to performance. Therefore, the purpose of this study was to record three-dimensional ball kinematics in a large and truly high level cohort of elite and pathway finger-spin (FS) and wrist-spin (WS) bowlers, identifying potential performance measures that can be subsequently used in future research. A 22-camera Vicon motion analysis system captured retro-reflective markers placed on the seam (static) and ball (dynamic) to quantify ball kinematics in 36 FS (12 elite and 24 pathway) and 20 WS (eight elite and 12 pathway) bowlers. Results indicated that FS bowlers delivered the ball with an increased axis of rotation elevation, while wrist-spin bowlers placed greater amounts of revolutions on the ball. It also highlighted that ball release (BR) velocity, revolutions and velocity/revolution index scores for both groups and seam stability for FS bowlers, and seam azimuth angle and spin axis elevation angle for WS bowlers, were discriminators of playing level. As such these variables could be used as indicators of performance (i.e. performance measures) in future research.
旋转投球在板球比赛中起着至关重要的作用，但对于精英级和进阶阶段的旋转投球手的初始球运动学，以及它们与表现之间的关系，人们了解甚少。因此，本研究的目的是记录一大批真正高水平的精英级和进阶阶段的手指旋转（FS）和手腕旋转（WS）投球手的三维球运动学，确定随后可用于未来研究的潜在表现指标。一个由22台摄像机组成的Vicon运动分析系统捕捉放置在球缝（静态）和球（动态）上的反光标记，以量化36名FS（12名精英级和24名进阶阶段）和20名WS（8名精英级和12名进阶阶段）投球手的球运动学。结果表明，FS投球手投球时旋转轴仰角增加，而手腕旋转投球手使球产生更多的旋转。研究还突出显示，两组的球释放（BR）速度、旋转次数和速度/旋转指数得分，以及FS投球手的球缝稳定性，和WS投球手的球缝方位角和旋转轴仰角，是比赛水平的区分因素。因此，这些变量可在未来研究中用作表现指标（即表现测量指标）。
