The symptoms of lumbar pain appear as soon as you exercise, the common causes are the following: 1. The presence of lumbar muscle strain. Due to the existence of lumbar muscle strain, it will lead to local soft tissue congestion, edema, inflammatory reaction pathological changes, after exercise will appear pathological changes aggravated, resulting in pain; 2, seen in the lumbar spine instability, such as the existence of osteoporosis, degeneration of the vertebral body, and lumbar spine slippage and lumbar disc herniation, will lead to the lumbar spine to appear unstable, after exercise will appear lumbar spine The symptoms of lumbar pain can be caused by displacement or aggravation of nerve root compression; 3, seen in the presence of ankylosing spondylitis, ankylosing spondylitis will appear corresponding pathological changes in the bone, which will produce corresponding damage after the activity, resulting in painful symptoms. It is recommended that patients go to the hospital for a detailed examination to clarify the diagnosis.