Key points of calf muscle stretching action: standing posture, lunging backwards with one leg, tightening the core, keeping the body upright, bending the front legs, pressing the whole body back and forth, feeling the calf stretching, and always sticking to the ground. 20 seconds, repeat 4 groups, change the other leg, and continue 4 groups. Key points of arch relaxation: stand, put the golf ball on the ground, lift one foot on it, roll the sole back and forth, feel the arch squeeze and relax for 20 seconds, repeat 4 groups, and continue 4 groups with the other leg. Key points of toe curling: standing posture, with one leg slightly forward, stepping on the ground with all feet, lifting the toe of the big toe and feeling the arch contraction, repeat 12 times, 4 groups, and continue to do 4 groups with the other foot. Key points of anti-varus foot: Sit in a chair, slightly lift one foot, fix elastic belt with the forefoot, contract the arch of the foot, pull elastic belt inward, and then slowly relax. Repeat 12 times, 4 groups, switch to the other side, and continue 4 groups.