Boys don't forget to practice abdominal muscles 1. Lateral bending: upright. Legs apart, arms raised horizontally, upper body bent forward, fingers of left hand touching right foot, right arm naturally raised. Don't bend your legs and arms, inhale, then recover and exhale. In the other direction, repeat. Do it eight times in a row 2. Leg flexion: supine position. Put your arms flat on the ground, bend your knees and lift them at the same time after straightening your legs, and inhale to make your thighs close to your abdomen; Then exhale and slowly restore. Repeat 8 times. 3. Lift legs and abdomen: mainly to develop lower abdominal muscles. Lie flat on your upper body, straighten your legs as high as possible, and then slowly put them down. After this action is done evenly, bend your knees and continue to do the same action. Repeat 8 times. 4. Sitting posture: mainly to develop upper and lower abdominal muscles. Straighten your knees, lean back and forth, keep your body balanced, and then bend your knees and abdomen to make your abdominal muscles flex extremely. In practice, feet can never touch the ground. 5. "Cycling" exercise: supine position. Take turns to bend and stretch your legs, imitating the action of pedaling a bicycle, fast and flexible, and the range of flexion and extension is as large as possible. For 20-30 seconds. 6. Waist twisting: Hold the handle with one hand or pull a certain weight, do waist twisting and turning exercises in various postures, and exercise the external oblique muscles and waist muscles. Everyone can choose the above exercise according to their own situation, and according to their own physical condition, the amount of exercise will gradually increase from less to more, twice a day.