Does the race hurt your knee?
Many people want to choose race walking as a form of exercise, but they are afraid of hurting their knees. In fact, race walking is less harmful to the knee than running. Because the whole body resonates when running, the knee injury will be aggravated. If the posture is correct, there is no damage to the knee. But we'd better take protective measures when doing exercise. If you do stretching exercise before exercise and wear protective equipment such as knee pads, the injury to your knees will be reduced.
The correct race walking will not only do no harm to the body, but also play a good role in losing weight. Therefore, race walking is the simplest, easiest to implement and less prone to accidents, so it is also called "non-injury exercise" and one of the more popular fitness exercises today.
Using the curve of the ground reaction force from the heel landing to the sole leaving the ground, we clearly found that the peak value of the ground reaction force increased sharply in the two time periods of 0. 1-0.2 seconds and 0.4-0.5 seconds (that is, the initial landing). It can be seen from the slope of the curve that this force is not only very large, but also very fast. From the decomposition action, we can see that at the moment of landing, because the ankle movement can not be effectively buffered, the ankle joint and knee joint above the heel directly receive the maximum force.
When landing, the rapid transition from the forefoot to the heel is equivalent to lengthening the calf achilles tendon, which is very elastic, just like a rubber band. As a result, the elastic potential energy of the achilles tendon is stored in the forefoot landing and released in the pedaling and stretching (that is, pull-ups) stage, which increases the forward strength, thus improving the running efficiency, being fast and not easy to be injured.