1, cooperate with breathing. 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.

2. Rise height: keep an angle of 45 degrees. Sit-ups do not mean that the higher you stand, the more effective you are. The correct method should be to extend the duration of 45-degree angle between your body and the ground as much as possible (at least 30 seconds), so that the abdominal muscles can be practiced most effectively.

Don't hold your head with your hands. Generally speaking, sit-ups lose weight by putting your hands and fingers behind your head, but in the process of sit-ups, you often raise your head with your hands, which is easy to cause neck muscle strain. The correct way is to cross your hands on your chest or put your hands on your ears. When you sit up, let your abdomen exert strength, not your arms.

The upper body should be rolled up, not lifted. If you do it at home, whether you are lying on the bed or sofa, you should lift your feet so that your knees bend 90 degrees and your hips bend 120 degrees to form a step shape. This is the correct starting posture. You should roll up your upper body when you do it, not lift it. Direct lifting is easy to cause lumbar injury.

5. Sit-ups are not as fast as possible. On the one hand, speed has its own rhetoric. Fast can exercise explosive power, slow can better stimulate muscles comprehensively and evenly. For most people, the latter is better.