After running exercises, back pain and activity limitation are generally caused by excessive exercise, spondylitis and cervical spondylosis. 1. Exercise too much: when running exercises a lot of exercise, may lead to the body to produce a lot of lactic acid, accumulation in the body may cause back pain activities limited situation. 2. Spondylitis: spondylitis is a chronic progressive inflammation of the small joints of the spine, the disease in the early stages of low back pain, morning stiffness and other symptoms, some patients will also appear running back pain. 3. cervical spondylosis: mostly due to cervical degenerative changes, chronic strain injury and other conditions, the patient will usually appear neck and back pain, stiffness symptoms, can also appear after running exercise back pain activities are limited, etc., when running exercises after back pain. When the back pain after running exercise activities are limited, it is recommended to slightly move the body to relax, if not relieved, should go to the hospital in time for treatment.