The best and most common way to lose weight is running. Keep jogging in the gym for more than 40 minutes every day. Do sit-ups after running. Do it in groups, 20 or more in each group, until you are weak.

First, lateral bending and upright exercise. Separate your legs, raise your arms horizontally, bend your upper body forward, extend your left hand to your right foot, raise your right arm naturally, don't bend your legs and arms, inhale, and then exhale. Repeat in the opposite direction, 8 times in a row.

Second, leg flexion exercise supine position. Keep your arms flat on the ground, lift your knees at the same time after your legs are straightened, inhale to make your thighs close to your abdomen, then exhale and slowly recover. Repeat 8 times.

Third, lifting the legs and abdomen is mainly to exercise the 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, bend your knees and continue to do the same action. Repeat 8 times.

Abdominal muscles are an important part of human connective tissue, including rectus abdominis, oblique abdominis, oblique abdominis and transverse abdominis. When they contract, they can bend and rotate the trunk to prevent the pelvis from leaning forward.

Abdominal muscles also play an important role in the activity and stability of lumbar spine, and can also control the activity of pelvis and spine. Abdominal muscle weakness may lead to pelvic forward tilt and increase the physiological curvature of lumbar spine, increasing the chance of low back pain.

Reference: Baidu Encyclopedia "Abdominal Muscle"