看Henryli 的貼提醒我最近看到的關於eccentric exercise 的重要性：

https://www.news-medical.net/amp/news/20221103/Study-highlights-the-benefits-of-eccentric-focused-training.aspx

"All three saw improvements in concentric strength, but this was the only improvement for the concentric-only group.

The eccentric-only and concentric-eccentric groups also saw significant improvements in isometric (static) strength and eccentric strength."

簡單來說，就是在concentric, isocentric and eccentric 3類力量型訓練，eccentric group 更有效地強化了肌肉的靜態和伸長力量。

所以我們在鍛煉時應該更重視eccentric exercise, 如果沒有很多時間的話，以eccentric exercise 為主。

Henryli 介紹的動作，在腿上踢後往下放的過程就是eccentric exercise. 現在重力訓練譬如squats 講究快速站立3秒下蹲就是這個道理。