In this video, the trainer explains why to stop doing squats, demonstrates knee bending exercises, shows how to perform them, then moves on to leg lifts, demonstrates those, and finally introduces a daily exercise app. 0:00 - スクワットは辞めよう。0:21 - 膝の曲げ伸ばしやり方。0:47 - 膝の曲げ伸ばし実践。1:28 - 足の上げ下げやり方。1:53 - 足の上げ下げ実践。2:32 - 毎日運動アプリ紹介。