The pain of running is often caused by the following reasons: 1. there may be a sprain of the lumbar muscles. In the process of running, due to arm swing and stride, the muscles of the waist also need to coordinate to do the corresponding action, at this time, if the running action is too intense, it may cause sprain of the muscles of the waist, and then lead to back pain; 2, there may be breathing-related muscle spasm, this situation is commonly known as forked breath. That is, because of the running is too intense, breathing suddenly accelerated, so that the lumbar muscles to assist breathing suddenly produced spasm, and then will cause back pain; 3, may be due to osteoporosis caused by. Severe osteoporosis, if patients do strenuous exercise, it may cause pain in the waist and lower limbs; 4, may be caused by running induced degenerative lesions of the lumbar spine, such as patients suffering from lumbar disc herniation, if the onset of the process of running may also aggravate the lumbago.