There are many reasons for walking back pain. First, if walking for a long time appears back pain, or there was an injury to the waist, walking for a period of time will be back pain, check whether there was a fall, a misalignment of the hip bone or pelvic tilt, this can cause pain in the waist. Second, walking for a long time back pain is a lack of exercise. If you usually do not exercise, walk a long distance, there will be muscles and joints can not adapt to the state of movement, and there is a lack of coordination, and lumbar pain. In this case it is necessary to strengthen the exercise. Third, walking for a long time appeared back pain, may be the wrong posture. If the walking posture is not right, there is a twisted back, hunchback, body leaning forward, will make the waist muscles in a tense and unnatural state, it is easy to increase the load on the waist, causing lumbar muscle strain, and cause pain in the waist. Fourth, walking too long can make lactic acid buildup, if too much exercise, it will make a lot of lactic acid secretion, can not be discharged in time will lead to muscle pain, can also cause lumbar pain. Other like walking when the road is uneven, there may be impact on the feet, knees and waist, especially on rugged mountain roads, the impact will be greater, and the pressure on the lumbar muscles is also greater, which may induce lumbar pain.