Lower back pain and leg pain are mainly related to calcium deficiency, lumbar spine lesions or overwork, and can be relieved by medication, surgery or exercise therapy. 1. Calcium deficiency: If there is calcium deficiency in the body, it is easy to cause osteoporosis, which leads to the symptoms of back pain and leg soreness, so you can consider taking calcium supplements to alleviate the symptoms, such as calcium gluconate. 2. Lumbar spine lesions: If there are lumbar spine lesions, such as lumbar spinal stenosis or lumbar disc herniation, it is easy to cause lumbar pain, and when the compression of the nerve root, it is possible to cause the symptom of leg soreness and lack of strength, which can be treated by lumbar traction or lumbar foramenoscopy surgery. 3. Excessive exertion: usually, if you often bend over and bear weight, it is easy to lead to lumbar and leg muscle fatigue, thus triggering lumbar pain and leg soreness and lack of strength symptoms, you can consider through the movement of stretching with the muscle strength training method of relief. Usually pay attention to the appropriate exercise, do not sit for a long time or often bending over and weight-bearing activities. If the symptoms are more serious, you need to standardize the treatment under the guidance of the doctor.