Can’t bend over after playing a game of ball may have lumbar injury, such as lumbar muscle strain, lumbar disc herniation, muscle strain and other reasons. 1. Lumbar muscle strain: after playing a game of ball can not bend down there may be lumbar muscle strain, if the action posture is not appropriate, training intensity is too large, lumbar back strength is not enough, etc. can cause lumbar muscle strain. Lumbar muscle strain is due to long-term overuse of lumbar muscles, causing fatigue. It is recommended to strengthen the strength of the lumbar back muscles, but also can be pulled, massage, with the use of medication and so on. 2. Lumbar disc herniation: there may be a lumbar disc herniation, and the pain induced by playing ball, so that it can not bend down, if there is a lumbar disc herniation, due to the wrong posture of the ball, the force is not the right reason for the aggravation of the herniation. It is recommended to wear lumbar protection when playing ball, or reduce the movement, timely medical treatment. 3. Lumbar muscle strain: due to posture, improper movement, mostly accompanied by acute pain, should be braked and rest, go to the regular hospital in time. After playing a game of ball can not bend down there may be other reasons, it is recommended that you should go to the hospital in a timely manner, clear reasons, and active treatment.