1, the best posture for thin abdomen is to put your hands behind your neck. This may be a sit-up posture that everyone is familiar with, but it is likely to oppress the neck nerve and the weight loss effect is limited. Therefore, the posture with the best effect of thin abdomen is: lying on the bed, legs bent normally, hands half clenched on both sides of ears, arms as wide as possible. When doing the action, let the waist exert force, keep the upper body straight, pay attention to the waist not leaving the ground, then slowly descend to make the body in the original position, and repeat the above actions. When the abdominal muscles pull you up, you have to exhale, so as to ensure that all the muscles deeper in the abdomen participate in the work at the same time. Don't straighten your legs during practice, otherwise it will not only waste time, but even be harmful. In addition, if you gently hold your hands on your chest, the weight loss effect will be better. 2, keep your body balanced In the process of doing sit-ups, I suggest that you must try to control the direction of sit-ups, do not deviate from the straight line, and swing your body left and right. And the speed should be slowed down to exercise the control ability of abdominal muscles. It is best to feel the movement of abdominal muscles with your heart when you get up. In the process of learning to control the rhythm and do sit-ups, everyone must step by step, not blindly impatient. Many people do sit-ups in their own homes, forcing themselves to complete a specified number of actions in one minute, thinking that this can enhance abdominal strength. In fact, it is easy to cause abdominal muscle strain. Too fast frequency can't improve the exercise effect. Only by slowing down the exercise rhythm properly can we avoid the physical discomfort caused by excessive fatigue and enhance the training effect of abdominal muscles. In order to achieve the goal of reducing abdominal fat, it is necessary to control the rhythm and avoid doing a lot of sit-ups from the beginning, which will lead to muscle pain. You can try to do it five times a minute at first, and then slowly increase it until it reaches about 30 times. 4. With other aerobic exercises, don't pin all your hopes on sit-ups, because only relying on sit-ups can only achieve local fitness effects, because sit-ups are directly aimed at abdominal muscle groups. Long-term exercise may strengthen abdominal muscles, but other parts of the body, such as thighs and buttocks, get less exercise. And it is impossible to achieve the weight loss effect of a certain part through a kind of exercise. In order to strengthen the effect of thin waist, it is necessary to effectively combine sit-ups with aerobic exercise to achieve a perfect weight loss effect. If you want to lose weight or thin belly through sit-ups, then you must master the most correct posture, step by step, do not blindly pursue speed or quantity, and it is best to combine it with other aerobic exercises. This slimming effect must be the most perfect!