The main hazards of walking 10,000 steps a day are the following: 1, for joint damage, especially seen in the middle-aged and elderly, if you walk 10,000 steps a day outside the physical range, will wear cartilage and meniscus, further will wear bone tissue, resulting in hip and knee osteoarthritis, will bring long-term pain or joint not lubricated, etc., so that the daily quality of life is affected. 2, walking 10,000 steps a day, may induce respiratory and cardiovascular diseases, such as middle-aged and elderly people walking a lot will induce acute ischemia of the heart and fainting, if there are no relatives and friends around to rescue, there may be life-threatening. 3, walking 10,000 steps a day if it is done at once, the consumption of the body is very large, easy to induce colds and other uncertain diseases after sweating.