In clinical practice, patients should do a good job of lumbar stretching before exercise to prevent injury during exercise. For specific lumbar stretching, the patient should be instructed to squat as far as possible, extend one lower extremity forward, do the maximum range of hip flexion and knee flexion, and place the patient’s hands on the knee joint; the other lower extremity should be extended backward as far as possible, while bending the knee and landing on the knee joint, so that this position is maintained for about 30 seconds. Switch to the other lower extremity and do the same. Through the correct stretching action, the elasticity and toughness of the muscles can be strengthened to avoid muscle injury during exercise, prevent muscle fatigue, and prevent painful effects.