2. Find a flat ground, make the left leg at 90 degrees with the ground, straighten the right leg backwards, put your hands on the knees of your left leg, and press down hard until you reach the maximum tolerance; Press for a while, then press the other leg. Note: Don't push too hard to avoid strain.
3. Straighten your arms and open your legs to the maximum, with one leg to the left and one leg to the right; The left leg is perpendicular to the ground, then press down, hold it for a few minutes, and then change the other leg.
4, put a mat on the ground, people sit on it, the spine is perpendicular to the ground, the legs are straight, the toes are hooked, and the waist is as close as possible to the legs, so that not only the legs are pressed, but also the waist is pressed. When pressing, use abdominal breathing, inhale, and then exhale, and repeat.