The pain in the lower back may be caused by exertion or incorrect posture during exercise, or there may be lesions in the lower back itself, such as lumbar disc herniation, lumbar spondylolisthesis, etc. Conservative treatment or surgical treatment will be carried out according to the different reasons. 1. Problems with exercise posture: In the process of practicing leg exercises, the lumbar muscles may be damaged due to incorrect force or posture, it is recommended to rest and adjust, and if the pain is serious, you can take medication (ibuprofen) under the guidance of a doctor, and then adjust the exercise mode after the pain is relieved, or exercise under the guidance of a professional. 2. Lumbar disc herniation: The existence of lumbar disc herniation may induce pain in the process of practicing leg exercises. For the treatment of lumbar disc herniation, bed rest, sleeping on a hard bed, massage, physical therapy, taking non-steroidal anti-inflammatory drugs (celecoxib, etc.) for conservative treatment, if the above treatments are ineffective, surgical treatments, including intervertebral disc removal, minimally invasive intervertebral foramenoscopic surgery and so on, should be carried out. 3. Lumbar spondylolisthesis: lumbar spondylolisthesis will cause lumbar pain after exercise, generally should be given timely medication, commonly used drugs, including ibuprofen, celecoxib, etc., but also with moxibustion, physical therapy, etc., and if the treatment is not effective need to be surgical treatment, commonly used surgical fusion, decompression of the plate and other surgical methods. There may be other reasons for back pain when practicing leg exercises, so it is recommended to consult the hospital in time to clarify the cause of back pain, and carry out treatment and adjustments under the guidance of the doctor according to the cause of the disease. The above drugs should avoid blind self-medication.