The boy's waist is thin and flat from the front, but it is still wide from left to right, especially the meat on both sides of the waist is pinched for help.

It's not that sit-ups are useless, but that you didn't do it right. Look at the following method. I used this method very well and slim before. I made a group of 30 on the first day, two groups on the second day, and gradually accumulated to six groups. I believe you will see the effect in two months.

Methods/Steps 1 Position of hands Traditional sit-ups, with hands and fingers crossed behind the head, often raise the head with both hands during sit-ups, which is easy to cause neck muscle strain. The correct way is to cross your hands on your chest. When you sit up, let your abdomen exert strength, not your arms. Generally speaking, the closer your hand is to your head, the more difficult it is to get up. If you want to increase the difficulty, you can put your hands behind your head. Be careful not to point your elbow forward when you get up, and try to spread it to both sides. Sit-ups beginners can also put their hands on their sides to reduce the difficulty of getting up. 2, the force point Traditional sit-ups need to fix the foot, which will increase the burden on the thigh and hip flexors, thus reducing the role of abdominal muscles. When external force increases, hip strength is often used to complete sit-ups, which is easy to cause damage to the waist and coccyx. Therefore, attention should be moderate when using external force. 3, speed exercise standard 1 minute to do more than 30 sit-ups, so many people think that sit-ups need speed. In fact, the faster the speed, the less pressure on the abdominal muscles. The correct way should be to slow down as much as possible and exercise the control ability of abdominal muscles. Pay attention to exhaling when you get up, so that you can exercise the deeper muscles in your abdomen at the same time. 4, get up highly traditional sit-ups need to let the forehead touch the knee and then recover, that is, the upper body quickly rises from the flat state to about 90, in fact, the burden of rectus abdominis did not reach the heaviest stage before getting up to 45. Because at this initial stage, there is a synergistic effect of sternocleidomastoid muscle, pectoralis major muscle, intercostal muscle, psoas minor muscle, psoas major muscle and iliac muscle. However, in the process of exceeding 45-90, due to the continuous shortening of the "resistance arm" from the upper body center of gravity to the hip fulcrum, the "crane function" burden of abdominal muscles is getting smaller and smaller, and the burden of rectus abdominis does not reach the heaviest. Only when the upper body rises to 45 degrees is the best time for rectus abdominis to "resist the growth function". Therefore, sit-ups are not the more effective the height of getting up. The correct way should be to stop at the position of getting up about 45, and then slowly return to let the rectus abdominis get full exercise. 5. The number of exercises and group sit-ups is easier than other exercises, but it also needs to be practiced step by step, otherwise it will easily cause muscle strain, which is not conducive to long-term persistence. Try 5'/ group first, and then add it again for each exercise. When it is added to 15'/ group, try another group and gradually reach 3 groups each time. Sit-ups can directly target the abdominal muscle groups, and exercise the muscles in different parts of the abdomen through slight changes in movements, and finally achieve the effect of shaping. The most common sit-up method is to lie on your back, bend your knees about 90 degrees, put your feet flat on the ground, fix them with external force, and then sit up with abdominal muscles.