直臂划水衝刺時力氣花在前段而不是後段 … - 游泳討論
By Jessica
at 2011-06-11T20:09
at 2011-06-11T20:09
Table of Contents
推 Nomoresin:這就是所謂的"放鬆" 很不容易學習的地方 06/11 16:02
沒錯，什麼時候該放鬆呢，請看這張圖 http://ppt.cc/Z3T!
Fy是無助於前進的垂直分力，Fy絕對值越大就越要放鬆，
最粗糙的區分法就是「前1/3 中1/3 後1/3」，前後放鬆，中間出力，
過程都是ｍａｘ的力量，不是最佳化的出力分配。
Fy不只無效，還有其他缺點會減損Fx的效用。
"S型"或"高手肘划水"等等，目的都是用更通俗易懂的說法，
教大家在提高Fx所佔週期，把中間出力的1/3加大，前後無效比例高的各1/3減少。
只不過很多教游泳的人，到後來都不知道"S型"或"高手肘划水"的理由何在。
直臂划手就是劣在這裡，Fy佔比例太大。
「感覺很有力」可以肯定你出了很多力，卻不見得都有用在前進上。
BTW
我有聽過一個說法：「"S型划水"路徑比較長，所以可以划比較多水，比較有效率」
不知道有沒有版友聽過/教過這種觀念的？
希望可以聽到有人跳出來解釋，因為我不認為這個說法合理。
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