The gym has special equipment. If there are no conditions, you can find a parallel bar, hold your body up with your hands, keep your waist straight, and then repeat the leg lifting action, that is, bend your knees, and use the strength of your waist to drive your legs up. This is also the basic training method of NBA, but their workload is much bigger. For example, if a heavy sandbag is tied to your leg, you don't need a small bamboo. Keep practicing every day, and divide into several groups, with no more than 20 times in each group. Take a break of 30 seconds for each group and do a few more groups, and you will succeed. . .