If your exercise intensity is relatively light, you can massage your muscles 15 minutes before going to bed after exercise, which is harmless to your muscles. However, if the exercise is intense, the heart beats faster or even sweats, it is not recommended to sleep after a simple massage. Facts have proved that strenuous exercise should not be done within two hours before going to bed, otherwise it will cause muscle stiffness and no toughness, which is not conducive to work and study the next day.