Maybe you do, but if not . . . if you coach people who have issues with keeping proper lunge form, this article by Molly Galbraith is very useful. It has great coaching cues for the pushup, lunge, chinup, and step-up! I use several of these cues myself when I coach.
Four Basic Exercises Most People Perform Incorrectly
大会情報：5/28 JBJJF 第1回北海道柔術オープントーナメント 中島体育センター
1 hour ago