看Henryli 的贴提醒我最近看到的关于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."

简单来说，就是在concentric, isocentric and eccentric 3类力量型训练，eccentric group 更有效地强化了肌肉的静态和伸长力量。

所以我们在锻炼时应该更重视eccentric exercise, 如果没有很多时间的话，以eccentric exercise 为主。

Henryli 介绍的动作，在腿上踢后往下放的过程就是eccentric exercise. 现在重力训练譬如squats 讲究快速站立3秒下蹲就是这个道理。