Practice; Straighten your knees, bend over, touch your left toe with your right finger first, and then touch your right toe with your left finger. This can exercise both rectus abdominis and oblique abdominis.
(2) Shake your hand and touch the ground. Ready: stand at attention.
Practice: Bend down, knees and arms straight and touch the ground, then quickly lift the upper body and touch the ground again.
(3) Keep your knees upright. Ready: stand at attention.
Practice: Bend your knees up with your legs in turn, hold your knees with your hands, and try to touch your chest with your knees.
(4) vertical pendulum. Preparatory: Stand upright with legs together and arms raised horizontally.
Practice, bend your knees, lift your thighs and swing your arms sideways at the same time.