Sit-ups are certainly abdominal muscle training's first choice. But what is the most effective method? If you have a thick belly fat layer. You must adopt aerobic training. Jogging first. 10 minutes. Lie down and do sit-ups. Then get up immediately and make a sprint. Hold on for more than 30 seconds. Then immediately lie down and do sit-ups. Get up and jog for another 3 minutes. Lie down again. Then get up and sprint. This practice is super tiring. Few people can persist for a month in a row. But those who insist. Great ABS! If you are thin. That's easy. My solution is to forget the methods and groups of abdominal muscles mentioned in bodybuilding books. Do it every day. I feel my abdominal muscles burning every day until my forehead sweats. The standard is to stand up straight and make an ugly gesture when stopping to relieve abdominal muscle spasm. Stick to it for half a month, and your abdominal muscles will be unique. On the new practice of sit-ups. The traditional way to do hair is to press your feet under someone's ass, bend your legs, put your head in your hands and touch your knees with your elbows. In fact, this method can only practice abdominal muscle feeding in that position. What about the stomach? Practice the lower abdomen, lie flat, and put your hands on your sides. Leg lifts. Don't lift it to 90 degrees. Just hold it above 45 degrees. Do it repeatedly. My stomach is gone. Besides, I don't do sit-ups completely. Make into segments. Example: 1, head off the ground, away from the ground. Stop halfway up. 2. The body is completely off the ground. Elbows touch knees. 3, the body fell, but did not touch the ground. Stop in action. 4, the body is completely paralyzed. Prepare for the next move. The above four steps are once. Eight times in a group.