1, sit-ups: lie flat on the mat, put your hands behind your head, and open the flat head with your elbows. Conversely, four beats up and four beats down. Pay attention to the waist strength from the left and right sides, elbow and head level.

2. Elbow support: Face down, put your hands on your chest, and support the ground with elbows and toes. Support your body with abdominal strength, hold 10 for 20 seconds and then put it down. Can be repeated many times.

3, body flexion: lying flat on the mat, hands naturally placed on both sides of the body. Lift your legs, your thighs are at 90 degrees to the horizon, and your calves are at 90 degrees to your thighs. Use the strength of the lower abdomen and thighs to lower the legs in turn and then hang them. Don't touch the ground when your legs are down. The downward hanging of one leg is 1 8 beat, with 8 8 beats each time.

4. abdominal muscle training machine: Put your hands on the bracket and bend forward with breathing. The strength of the bracket can be adjusted, and the strength can be determined according to the individual situation, and the bracket is pressed down with the bending strength. Do it more than 30 times in each group, and take a break to continue. The more you can do, the better.