Why can't you run down the hill?

When people run downhill, because of the weight component, there will be an oblique downhill traction force, as well as the pedaling force of their feet, which is very impressive in general. If people run downhill, it is easy to run faster and faster until they want to stop but can't stop. From the point of view of sports physiology, downhill running makes the speed of alternating feet faster and faster. When it reaches a certain speed, it will lose its control ability and reach the limit of physical fitness. Therefore, runners can't change their direction at will, and they are easy to trip over themselves or other obstacles, which is extremely dangerous because of their extremely fast speed.

There is a training method to improve the pace frequency in the training program of sprinters, which belongs to the category of traction running. Athletes run down a slope of 20 ~ 30 to break through the limit of their own pace frequency. Usually the mountain road will have a slope greater than 30. If you run down the hill, the impact is amazing, which is difficult for ordinary sprinters to control, so it is very dangerous.