Sit-ups, a form of exercise. Lie on your back, put your legs together, raise your hand, contract your abdominal muscles, swing your arms forward, and quickly become a sitting position. Keep your upper body bent forward, touch your feet with your hands and bow your head. Then return to the sitting position. So continuous.

Practice sit-ups, the speed varies from person to person. Under the age of 30, the best performance of sit-ups should be 45-60 times/minute; At the age of 30, it is best to reach 35-40 times per minute; At the age of 40, it should be about 35 times per minute; At the age of 50, try to reach 25-30 times per minute.

Reducing the stomach needs to cooperate with breathing, and the muscles of the lower abdomen will become tight to achieve the effect of reducing the stomach.

When practicing: exhale in the ascending state (when exerting force) and inhale in the retreating state. Be still, for example, keep an angle of 45 degrees, keep normal chest breathing, and don't hold your breath.

Usually: Abdominal breathing helps to tighten the transverse abdominal muscles. When inhaling, feel the abdominal cavity lift inward and upward, and exhale deeply after inhaling fully. When you are sitting, standing or walking, you can consciously take abdominal breathing and form a habit.

Slimming principle: This breathing method can ensure that all muscles in the deeper abdomen participate in the work at the same time.