(1)–Ang chest: lie prone, use both hands title bed, first from the head backward, while supporting hands gradually support while the chest backward up, and finally make backward, ang chest force to reach the waist. Rest in a flat position and repeat 5-10 times. (2)–Backward leg extension: lying prone, lift the left leg backward, straighten the knee joint, lift the leg as high as possible. Maintain the highest position for half a minute and then lower. Alternate between the left and right legs, doing 20-40 times each. (3)–Turn your back: stand with your feet separated by shoulder width. Two upper limbs flat, neck and waist as far as possible to the side of the rotation, the action should not be fast, must use all the strength to make the rotation to the maximum. Can first to the left and then to the right, do 20-50 times. (4)–Flexing waist: stand, two feet apart as shoulders. Both legs straight, first do waist forward flexion, elasticity so that the two hands gradually touch the ground. Then do lumbar back extension. Then do the left and right side flexion waist. Flexion amplitude requirements gradually increase. Flex 20-30 times in each direction.