Walking and running can exercise, as to which is better, depending on the specific physical condition of the individual. Generally, walking is suitable for weak and elderly people, because the amount of walking is relatively small, sports injury is small. The impact of running on the knee joint is greater, easy to be injured, so running is not suitable for weak people and the elderly, in order to avoid sports injuries. Running is suitable for young people and athletes with good physical fitness, because running is a whole body sport, which requires high endurance, dexterity, coordination and speed. It is also possible to alternate or switch between running and walking, so it is better to walk or run mainly based on physical quality, and what is suitable for you is the best.