When you exercise for about 45 minutes your pulse slows down and goes back up several times toward the end of your session - what can caused thisl?

Answer 1

Pulse. Well your pulse increases when you excercise period. So the fact your pulse increaseing at the end of your 45mins exercise, it can be because it slows down when at rest, as in at the beginning of your workout, your heart rate is just starting to increase, so the fact that your already excerciseing, when your done your heart will beat fast because of it trying to slow back down if your at rest. It increases because of oxygen blood is needed.