1, supine holding the knee: supine position, knees, hip flexion, hands holding the knee to make it as close as possible to the abdomen, hips as far as possible to lift away from the bed (pay attention to not arching the back away from the bed), continued for a few seconds, repeated a number of times. 2, arch bridge: supine position, bilateral flexion of the elbows, flexion of the hips and knees, with the head, elbows, feet, five-point support, for the abdominal extension of the waist into the “arch bridge” shape, for a few seconds or longer, repeated many times. 3, straight leg elevation: supine position, put your hands naturally on both sides of the body, slowly lift both lower limbs or one side of the lower limbs, and try to straighten and elevate the knee joints as much as possible, repeat many times. 4, prone swallow fly: the patient lying on the bed with the abdomen collapsed waist, head up, arms stretched back, legs to the knee as the fulcrum of the back lift such as a swallow fly style, lasting a few seconds or longer, repeated many times. 5, left and right lateral flexion: standing position, feet apart and shoulder-width, hands crossed or uplifted to hold the occiput, the waist for the left and right side bending activities, lateral flexion to the maximum extent of a few seconds, repeated several times. 6, rotating waist: standing position, feet apart and shoulder width, hands across the waist, along the waist axis of the left and right swing rotation, amplitude from small to large, alternating with the reverse many times.