Why does my heart rate goes up and down?
Supervised by Itamar Medical
Your muscles require oxygen/nutrients to move you, as you exercise/move your muscles need more and more, so your oxygen demand gets higher so you breathe more heavily and your heart beats faster to provide your body/muscles the oxygen it needs.

Improve Answer Discuss the question "Why does my heart rate goes up and down?" Watch Question

First answer by Firems4289. Last edit by Firems4289. Contributor trust: 1 [recommend contributor]. Question popularity: 0 [recommend question]

Research your answer:

Answers.com > Wiki Answers > Categories > Health > Cardiovascular Health > Why does my heart rate goes up and down?