The second action is to stand with your back to the fitness stool, then land on one leg, put the other leg on the stool, hold your head up, tighten your waist and abdomen, hold your head with your hands, and lean forward slightly to keep your back straight and tight. The hip joint should be folded back to the maximum angle, so that you can feel the strength and tension of the hip. This can control the muscle strength for 2 to 3 seconds, restore the initial posture, and repeat this action. You should always keep your back and core muscles tight and breathe smoothly. The knee joint does not need to be completely locked. The greater the angle between the front and rear legs, the greater the stimulation to your hips.