The causes of pain in the legs after exercise, commonly due to leg muscle strain, lumbar disc herniation or pear-shaped muscle syndrome, etc., as follows: First, leg muscle strain: patients who exercise vigorously are prone to leg muscle strain, especially for beginners, the pain will be more pronounced, the patient will have a sense of soreness or leg muscle weakness, generally rest 2-3 days after the symptoms will be significantly relieved, or even disappear completely The patient can continue to participate in sports. Second, lumbar disc herniation or pear-shaped muscle syndrome: patients suffering from lumbar disc herniation or pear-shaped muscle syndrome, in the process of exercise will aggravate the disc herniation and pear-shaped muscle tension, resulting in nerve root and sciatic nerve compression, the patient will have radioactive pain symptoms in the legs, accompanied by lumbar spine activity restrictions, lumbar pain, CT scan, MRI can find lumbar disc lesions, and check the lower limbs EMG can detect sciatic neuropathy. After bed rest, massage, massage, acupuncture and other physical therapy, the patient can get significant relief of clinical symptoms.