[Abdominal Gymnastics for White-Collar Men]
1. Lie flat on your back, put your feet together tightly, and lift them up 10 cm. Keep this action for about 10 seconds, then put your feet down and lift them up. Repeat this set of actions 50 times. If you do it 100 times, the effect will be more ideal.
2. Lie flat, put your feet together, bend your knees, cross your hands behind your head, rotate your neck, face, and head slightly upward, look toward your knees, and move your head upwards 50-100 times.
