Your muscles will be in a relaxed state, and engaging in intense physical activity can strain or injure the muscles. https://tripwinder.com/%EB%A7%88%EC%82%AC%EC%A7%80-%EC%83%81%EB%8B%B4-%EC%8B%AC%EC%8B%A0%EC%9D%84-%EC%B9%98%EC%9C%A0%ED%95%98%EB%8A%94-%EA%B8%B8%EC%9E%A1%EC%9D%B4/