When the waist is over-rotated or the thighs are over-extended and abducted, it is easy to cause a pulling injury to one side of the psoas muscle, resulting in congestion, swelling and spasm of the psoas muscle, which can cause lumbago, abdominal pain, groin and perineal pain, and painful pumping in the anterior medial thigh. The back pain of lumbar muscle strain can be prevented, so in a sense, prevention is more important than treatment. How to prevent it in daily life ? 1, the correct sitting posture: sitting in the lumbar spine as convex as possible on the basis of trying to keep the lumbar muscles relaxed to reduce the pressure on the lumbar intervertebral discs, if possible with the help of lumbar cushion volume or lean back in the seat backrest to maintain the lumbar spine physiological convexity, ideally to reduce the pressure in the intervertebral discs by 300%. But even so, prolonged sitting is still detrimental to the lumbar bones and soft tissues. It is generally recommended that continuous sitting for about 1 hour must get up for lumbar activities in all directions, so that the muscles are fully relaxed and timely rest. 2, correct standing posture: head high, waist lightly convex, abdominal, not hunched back. In the queue, waiting for the car, often people are accustomed to the weight falls on one foot, in the long run may also lead to the spine, lower limb muscle imbalance, should be consciously adjusted. 3, the correct method of transfer – rolling log transfer method: the so-called overall transfer, refers to turning over, moving in bed and sitting up from a supine position to keep the trunk in a straight line. 4, the correct posture when carrying heavy objects: stand close to the heavy object, bend the knees, bend the hips, that is, keep the waist upright state squat, after using the strength of the legs to stand up and lift the heavy object, stand straight, move the legs to turn around and avoid twisting the waist.