Let's learn to run with folded legs first. (1) can reduce the work consumed or done when swinging. As we all know, if the leg is put a little straighter, it is obvious that the resistance arm of the leg is much longer than the folded leg, which takes a lot of effort. (2) The swing time is shorter, that is, the step frequency is faster. Swing your legs straighter, the swing range is much larger, and because its resistance arm is longer, its pace frequency will be much slower.

In fact, everyone usually has folded legs when running, but some people are many and some people are few. People who run for a long time are more likely to form a good leg-folding running posture.

Your physical strength is not very good, so you should do some auxiliary exercises of leg-folding running, which can save more physical strength and improve the speed of running. Practicing leg-folding running can be carried out like this: just like running forward, the calf of one leg kicks backward quickly until the heel touches the hip, and the other leg slightly pushes the ground to make the body bounce, so that the legs alternately kick backward and run into about 15 meters, and the action of kicking backward slowly turns into the action of leg-folding running, which ensures that you can experience leg-folding running. You can do this exercise every time you warm up, 2 ~ 3 times.