Only fairy's eye could see the fairy.
この下死点（上死点を0度とした時の180度のポイント）付近での踏み込みはクランクの回転にはまったくプラスにならないどころか逆に回転にブレーキを掛ける力になりスピードが上がらない上に大きくスタミナを奪う原因となり最も避けたい動作です。

　最もクランクを回転させるのに有効で、しかも重力という地上の全ての物に働く力まで効果的に使え、その上、股関節及び膝関節の伸展という人間が発揮できる最大の力を有効に使えるポイントは、クランクが地面に水平（上死点から90度）のポイントです。
この位置にクランクが来たときに最も大きな力を発揮し上死点、下死点にクランクが来たときに動作の切り替えを行い無駄な力を出さない事が力学的にも人間の動作の上でも最も効果的な方法です。
“
— 引き足の意義と誤解 - Road in New York (via tanigon)
Reblogged 9 months ago from hm7 (Originally from tanigon)
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