Elliott B, Christmass M
Department of Human Movement, University of Western Australia, Nedlands.
J Sports Sci. 1995 Apr;13(2):141-51. doi: 10.1080/02640419508732221.
Three-dimensional, high-speed cinematography was used to compare backspin backhand techniques of high performance players hitting low (5.4 cm below hip height) and high (41.6 cm above hip height) bouncing balls using their preferred method of holding the racket (eastern backhand or continental grip: hand generally on top of the handle) and non-preferred ('behind the handle') grip. The Direct Linear Transformation method was used for three-dimensional space reconstruction from two-dimensional images recorded from laterally placed phase-locked cameras operating at 200 Hz. The only significant differences (P < 0.05) caused by the change in grip were that the ball was impacted further in front of the body when using the non-preferred grip, and a lower peak racket-shoulder speed was recorded for a high bouncing ball when using the non-preferred grip. Irrespective of the type of grip, the players significantly modified (P < 0.01) their technique to hit a high bouncing ball by adopting a more upright trunk, more rotated shoulder alignment (racket shoulder pointing more towards opponent), a larger front knee angle and a more abducted upper arm. Hitting a high ball was also characterized by a less inclined approach trajectory of the racket, a more vertical racket-face and a different speed profile for the segments of the upper limb and racket.
运用三维高速摄影技术，比较高水平运动员使用其偏好的握拍方式（东方式反手或大陆式握拍：手通常置于拍柄上方）和非偏好的（“柄后式”）握拍方式击打低（髋部高度以下5.4厘米）、高（髋部高度以上41.6厘米）弹跳球的下旋反手技术。采用直接线性变换法，从横向放置的、以200赫兹频率工作的锁相摄像机记录的二维图像中重建三维空间。握拍方式改变所导致的唯一显著差异（P<0.05）是，使用非偏好握拍方式时球在身体前方的撞击点更远，并且使用非偏好握拍方式击打高弹跳球时记录到的拍肩峰值速度更低。无论握拍类型如何，运动员通过采用更直立的躯干、更旋转的肩部对齐方式（拍肩更指向对手）、更大的前膝角度和更外展的上臂，显著改变（P<0.01）了他们击打高弹跳球的技术。击打高球的特点还包括拍的接近轨迹倾斜度更小、拍面更垂直以及上肢和拍各部分的速度分布不同。
