1, warm-up exercise. The left hand stretches forward parallel to the shoulder, the right hand stretches backward to balance the body, and the right leg bends to the left hand; The right hand extends forward parallel to the shoulder, the left hand extends backward, the left leg bends its knees until it touches the left hand, and the left and right legs take turns to do it.
2, legs together, tighten the muscles of the hips and legs, four or five feet in front of the chair, the body bends forward 90 degrees, the left and right hands are folded flat on the back of the chair, the head presses the arms, tightens the abdominal muscles, and feels the muscles of the back tighten.
3. Lift the left leg back to the level of the upper body, push the foot back straight, and feel the leg muscles tightened. Hold this action for 10 second. Similarly, the left and right legs take turns.