1. Adjust the proper height before using sit-ups. The higher the height, the more difficult it is. (Initial users should start exercising from the lowest height. )

2. After adjusting the height of sit-ups, sit on the sit-ups, hook the underframe with your toes, and slowly lie flat on the sit-ups.

3. After sit-ups, your chin is slightly retracted and your hands are placed at your ears.

4. To exercise the rectus abdominis, you only need to get up slowly with the abdominal muscles. Each movement can be done in 4 groups, and each group can be completed 15 times.

5. After completing four groups of movements, sit up slowly and get down from sit-ups to complete the whole exercise process.