(1) supine lift pelvis supine position with knees flexed, with the feet and back as a fulcrum, lift the pelvis, and then slowly fall, repeated 20 times. The action can correct the lower pelvis anterior tilt, increase the lumbar spine curvature. (2) knee touching chest supine position with knees flexed, hands holding the knee so that it is as close to the chest, but be careful not to arch the back out of bed. (3) side lying leg lift side lying position, the upper leg can be straight, the lower knee slightly flexed, the upper leg side lift, and then slowly put down, repeated dozens of times. (4) crawl with knees touching elbows double knees and upper extremities propped up prone, lumbar relaxation nuclear hair slowly sink, regain 10 times, one side of the lower limb straight, bend the knee so that it touches the same side of the elbow joint as far as possible. Repeat 15 times. (5) straight leg raise supine position, the hands pressed under the buttocks, slowly lift both lower limbs, the knee joint can be slightly flexed, and then put down, repeat 15 times. (6) leg press Sit on the bed, one knee slightly flexed, the other lower limb straight, torso lean forward to press to the straightened lower limb, and then exchange into the other lower limb. This action can also be performed in the standing position, lower limbs on the back of the chair in front. (7) Knee sit-ups supine position, both knees flexed, tucked so that the trunk lifted, hands touching the knees.