1, push-ups and operations. Lie face down, arms bent, palms on the floor, shoulders, feet and hips apart, toes under. Cheer up your abdomen in tension, because you have pressed your body up into a complete straight back. Lift your right foot, put your right knee on your chest, and then switch quickly so that your left knee is on your chest. Repeat 4 times, then put it down and return to its original position. Try to do 10 times.

2.YTI improved the back. Put your arms over your head, thumb up, stretch your spine, lift your chest (this is your "Y"), keep your toes on the floor, extend your arms to both sides ("T"), and then extend your arms back to your feet ("I"), if you can reach higher through your spine. Return to the starting position. Repeat the previous action 10 times.

3, the side abdomen is tight. Lie on your right side with your knees straight and your feet crossed. Support your upper body, your right elbow and forearm. Lift your hips until your figure is in a straight line from ankle to shoulder, and put your left hand behind your head. When you turn your left elbow to your right hand, slowly put your right hip joint on the floor. Tap your right hip on the floor (don't sit on it), then lift the backup to open your elbow and return to the starting position.