What happens in the human body when running a short distance?

When running, a number of processes take place in the human body. First of all, the muscles are strained, since they are directly involved in this. As the muscles work, they need more oxygen than usual. Because of this, more blood flows to the lower extremities. This is due to vasodilation and increased heart rate. Respiration also becomes more frequent, since in order to saturate the red blood cells with oxygen, it is necessary to actively ventilate the lungs. So we see that when running, the musculoskeletal, circulatory and respiratory systems work.