Second, sit-ups. Sit-ups should be familiar to everyone, but there are several kinds of sit-ups. The first is straight leg sit-ups, the second is bent leg sit-ups, and the first two exercises are the middle abdominal muscles. The third is swing sit-ups (this method can exercise both sides of the middle part of abdominal muscles, that is, get up slowly when getting up, and swing or twist left and right at the same time).
Third, the pedaling method. Lie on your back on the bed, put your hands under your hips, lift your head slightly, then lift your legs, about 30 to 50 degrees from the ground, and then step on them like riding a bicycle.
Fourth, Bruce Lee's flag-raising law. This method was invented by Bruce Lee, which is the most difficult and effective method I have ever seen. However, ordinary people can't. Only people who have a certain foundation in abdominal muscles can do it. You can only do it three or five times now. There are related videos on the Internet, so you can have a look. Method: Lying on a bench or bed, it is best to cover it with a quilt to avoid hurting your back. Grasp the fixture of the bedside (or bench head) with both hands. Then, lift the legs so that the legs and waist are completely separated from the bed surface or stool surface. At this time, only your head and shoulders touch the bed surface. After adjustment, straighten your legs and slowly lower them. (Note: Be sure to straighten your legs and put them down slowly. Keep your waist below your shoulders in the air, and don't touch the bed surface or stool surface. ) When it is put to a certain extent, the legs can't touch the bed surface, and then the legs take off hard and keep circulating (the legs can't touch the ground in this process). But many people find it difficult, and you may not be able to do it in one round. Then you can do some simple things first, that is, when you put down your leg, do your best to let it fall and don't force it to rise. Stick to it for a while, and your abdominal muscles should be fine.