Waist exercise: the baby lies on his back with his legs straight. The parents hold the child's waist with their right hand, hold the ankle with their left hand, and gently hold the child's waist with their right hand. When lifting the waist, pay attention to the child's head not to leave the bed surface, and don't use too much force.

Leg flexion and extension in turn: the baby lies on his back, legs are straight, and the mother gently holds the baby's ankle with both hands, pushes the left leg to bend to the abdomen, then restores it, then pushes the right leg to bend to the abdomen, and then puts it down and restores it twice in a row.