Why does your heart rete increase when running?

There are a few reasons why your heart rate increases when running.

* Increased demand for oxygen. When you run, your muscles need more oxygen to produce energy. This increased demand for oxygen causes your heart to pump faster to deliver more oxygen-rich blood to your muscles.

* Increased stroke volume. The stroke volume is the amount of blood that your heart pumps out with each beat. When you run, your stroke volume increases because your heart is able to contract more forcefully. This increased stroke volume helps to meet the increased demand for oxygen.

* Increased heart rate. The heart rate is the number of times your heart beats per minute. When you run, your heart rate increases because your heart is beating faster to pump more blood to your muscles.

The increase in your heart rate when running is a normal response to the increased demand for oxygen. It is important to listen to your body and slow down or stop running if you experience any chest pain, shortness of breath, or dizziness.