Walking five kilometers a day on the knee may have some damage, such as ligament damage, cartilage or meniscus damage, long-term daily five kilometers of sports injury probability will increase. 1. Ligament damage: If you walk five kilometers every day, the ligaments can compensate for the load damage in the short term, but if the long-term past, may exceed the ligament capacity and cause ligament damage. 2. Cartilage or meniscus damage: daily walking five kilometers on cartilage, meniscus damage injury stimulus is the biggest, mainly knee extension and flexion activities will be on the joint cartilage, meniscus caused by extrusion and other different degrees of damage. 3. long-term five kilometers a day sports injury probability will increase, mainly due to long-term persistent knee high load sports, will increase the risk of knee ligament, cartilage and meniscus injury. If, every day five kilometers in stages, can make the knee joint in the rest of the exercise, thus reducing the risk of injury. If there are related adverse symptoms, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.