a Department of Human Kinetics , St. Francis Xavier University , Antigonish , Canada.
b PING , Phoenix , AZ , USA.
J Sports Sci. 2018 Dec;36(24):2849-2855. doi: 10.1080/02640414.2018.1479133. Epub 2018 May 28.
The purpose of this study was to investigate the influence of shaft torque (torsional rigidity) on clubhead kinematics and the resulting flight of the ball. Two driver shafts with disparate levels of torque, but otherwise very similar properties, were tested by 40 right-handed golfers representing a range of abilities. Shaft deflection data as well as grip and clubhead kinematics were collected from 14 swings, with each shaft, for each golfer using an optical motion capture system. Ball flight and additional clubhead kinematics were collected using a Doppler radar launch monitor. At impact, the high torque shaft (HT) was associated with increased delivered loft (P = .028) and a more open face (P < .001) relative to the low torque shaft (LT). This resulted in the HT shaft being associated with a ball finishing position that was further right (P = .002). At the individual level, the change in face angle due solely to shaft deformation was significantly higher for the HT shaft for 25/40 participants. Although shaft twist was not directly measured, it was logically deduced using the collected data that these outcomes were the result of the HT being twisted more open relative to the LT shaft at impact.
本研究旨在探讨杆身扭矩（扭转刚性）对杆头运动学及球飞行的影响。40 名右手挥杆高尔夫球手测试了两款具有不同扭矩水平但其他特性非常相似的球杆。使用光学运动捕捉系统，从每个高尔夫球手的 14 次挥杆中收集了杆身挠度数据以及握把和杆头运动学数据。使用多普勒雷达发球监测器收集了球的飞行轨迹和其他杆头运动学数据。在击球时，与低扭矩杆（LT）相比，高扭矩杆（HT）的附加 loft 更高（P=.028），杆面更开（P<.001）。这导致 HT 杆击球的球的最终位置更偏右（P=.002）。在个体水平上，对于 25/40 的参与者来说，仅因杆身变形而导致的杆面角度变化在 HT 杆上要明显更高。尽管没有直接测量杆身扭转，但根据收集到的数据逻辑推断，这些结果是由于 HT 杆在击球时相对于 LT 杆扭转得更开。
