How does the pulse change during exercise and why?

Pulse – jerky vibrations of the wall of the arteries, which correspond to the beats of the heart in the cardiac cycle. During exercise, the pulse becomes more frequent, since the number of strokes of blood flow against the walls of blood vessels increases. This is due to an increase in the heart rate, since with an increase in the load, all organs and organ systems need more oxygen and nutrients than in a calm state. Therefore, during stress, the heart contracts often, a person breathes more often (fills the lungs with oxygen), which helps to provide the body with everything it needs. Therefore, the pulse quickens.