高爾夫的重心移轉
高爾夫的重心移轉對於高爾夫球手、高爾夫教練或是任何與高爾夫球員合作的動作專家都是非常重要的。
如果你的學員、選手或你自己在重心移轉有問題時建議可以做以下檢測
- 骨盆冠狀面動作：是否左右相稱/是否正確移動骨盆而非用腰椎側彎代償
2.單腳站立：單邊髖關節是否有良好的承重及平衡能力
https://www.youtube.com/watch?v=Jvv7BFG3rPI
3.髖關節旋轉活動度：水平面的旋轉的限制也會引響關節中心化的穩定
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他主要告訴了我們在高爾夫運動中重心移轉的重要性及動作模式，尤其是出現在冠狀面（frontal plane）的骨盆與股骨的相對動作，也代表了高爾夫啟動的骨盆位置並不是在原地旋轉，而有所謂軸位移的動作出現。
同時膝蓋的位置及動作雖然與骨盆軸向角速度沒有直接關係。但是因為膝蓋的位置會影響股骨的位置而影響髖關節不論在水平及冠狀面的扭力。
文獻：Takagi T, Murata M, Yokozawa T, Shiraki H. Dynamics of pelvis rotation about its longitudinal axis during the golf swing. Sports Biomechanics, 2019, April 30: 1–20.
節錄原文：
The purpose of this study was to identify the dynamic factors contributing to pelvis angular velocity about its longitudinal axis (pelvis axial angular velocity) during the golf swing. Thirty-one right-handed skilled golfers (handicap, 3.5 ± 1.8performed swings with a driver.
本研究的目的是找出在高爾夫揮杆過程中影響骨盆縱軸角速度(骨盆軸向角速度)的動力學因素。31名右手熟練的高爾夫球手(差點，3.5±1.8)打一號木竿。
The kinematic and kinetic data were collected using an optical motion analysis system and two force platforms. The dynamic factors (i.e., joint torque, gravitational force, motion-dependent forces and inertia forces) contributing to pelvis axial angular acceleration were calculated.
使用光學運動分析系統和兩個力板採集運動學和動力學數據。計算了影響骨盆軸向角加速度的動力因素(關節力矩、重力、運動相關力和慣性力)。
The present study revealed that the left (lead) hip flexor and adductor torques as well as the right (trail) hip extensor and abductor torques were identified as the main contributors to pelvis axial angular velocity.
本研究發現，左側髖關節屈肌和內收肌扭矩以及右側髖關節伸肌和外展肌力矩是影響骨盆軸向角速度的主要因素，而右側髖部伸肌和外展肌力矩是影響骨盆軸向角速度的主要因素。
These hip joint torques contributed not synchronously but sequentially to the pelvis.
這些髖關節扭矩不是同步的，而是順序作用於骨盆。
Although the knee joint torques contributed little to pelvis axial angular velocity directly, the knee joint torques might support the generation of large hip joint torques by regulating joint postures.
雖然膝關節力矩對骨盆軸向角速度的直接貢獻不大，但膝關節力矩可能通過調節關節姿態來支持髖關節大力矩的產生。
These findings indicate that the functional coordination of the lower limb segments as well as the magnitude of the joint torques play an important role in rotating the pelvis.
這些結果表明，下肢各節段的功能協調性和關節力矩的大小對骨盆的旋轉起著重要的作用。
