For English speaking viewers (Text copied from Facebook): 'jin comes from 4 parts: 1. legs 2. hips 3. waist(lower back) 4. upper back. 1. legs: use both legs. one move forward, while one stamp on the ground. 2. hips: use both hips. not about turning hips. one hip fold inward. at the same time, one hip place outward. to create a wringing motion. 3.lower back: power comes from changing arching back to lordosis. like a bow. 4. upper back: use the back, not the arms. use both shoulders. one shoulder push out, while the other shoulder will move inward accordingly. sum up all forces generated from these 4 parts. 個人覺得這部分講解和西方解剖學符合,例如股四頭肌、髂腰肌、背肌。例如,提肛可能就是為了練習拱腰,回复成塌腰時放出勁力。基本上就是利用姿勢肌群來產生力量/發勁。健身房的核心肌群訓練並不能相比,因為那只是增加力量,然而要同時協調所有肌群,才能合併產生的力量,這方面就是要靠傳統訓練方式,或套路練習。當你反复練習,小腦和脊髓也在學習。小腦本來就是主管技能記憶,而脊髓會透過改變神經元的方式,讓傳遞訊號清晰(例如加強抑制訊號傳遞神經的周邊雜訊),甚至建立新的反射弧,以便快速反應。其實肌肉也在學習,隨著反复訓練,肌肉會增大(hypertrophy),而肌纖維種類比例會隨著動作需要而調整'
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