Changes in angular momentum during the golf swing and their association with club head speed
Changes in angular momentum during the golf swing and their association with club head speed
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高尔夫挥杆过程中角动量的变化及其与杆头速度的关系
DOI：
10.1080/24748668.2019.1702298
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发表时间：
2019
影响因子：
2.1
通讯作者：
Isaka Tadao
中科院分区：
文献类型：
--
作者：
Izumoto Yoka;Kurihara Toshiyuki;Sato Takahiko;Maeo Sumiaki;Sugiyama Takashi;Kanehisa Hiroaki;Isaka Tadao
这项研究测量了高尔夫挥杆过程中角动量的变化，并确定了其与杆头速度（CHS）的关系。在17名男性大学生高尔夫运动员的驾驶员击球过程中获得解剖标志的三维坐标。一个15节段模型被用来计算总（身体俱乐部系统）的角动量的全身质心和躯干，手臂，腿，和俱乐部CHS节段的贡献。身体-球杆系统和球杆的角动量从后挥杆的顶部向击球方向增加。手臂的角动量在下挥杆中段前达到最大值，躯干的角动量在下挥杆中段后达到最大值。选择躯干最大角动量作为CHS的唯一贡献者（R2= 0.494，p = 0.002）。CHS与最大角动量和撞击角动量之间的相对差仅在躯干中呈负相关（r =-0.492，p = 0.045）。这些结果表明：1）杆头通过增加身体-球杆系统的角动量而加速，而不需要从近端（躯干）到远端（手臂）的连续运动; 2）在下挥杆的后期获得大的躯干角动量对于快速CHS是必不可少的。
This study measured changes in angular momentum during a golf swing and determined its associations with club head speed (CHS). Three-dimensional coordinates of anatomical landmarks were obtained during driver shots in 17 male collegiate golfers. A 15-segment model was used to calculate total (body-club system) angular momentum about the whole-body centre of mass and the segmental contributions of the trunk, arms, legs, and club to CHS. Angular momentum of the body-club system and the club increased from the top of the backswing towards ball impact. While angular momentum of the arms reached a maximum before the middle downswing, that of the trunk peaked after the middle downswing. The trunk maximum angular momentum was selected as the sole contributor for CHS (R2= 0.494,p= 0.002). CHS negatively correlated with the relative difference between maximum angular momentum and angular momentum at impact only in the trunk (r = −0.492,p= 0.045). These results suggest that 1) the club head is accelerated by increasing angular momentum of the body-club system without sequential motion from the proximal (trunk) to distal (arm) segments, and 2) gaining large trunk angular momentum in the later part of the downswing is essential for fast CHS.