A quick way to get your heart rate up is to do a form of cardiovascular exercise, like going for a run.  But at certain points, the rate at which your heart is beating could become dangerous.

Heart rate becomes a concern when your heart is beating too slowly (bradycardia) or too quickly (tachycardia).

Cardiologists generally are more concerned about things like heart rhythm than heart rate. A February 2021 story by the American Heart Association News says it's OK to track your heart rate but do not obsess over it. 

Dr. Tracy Stevens, cardiologist at Saint Luke's Mid America Heart Institute, explains why heart rate is just a piece of the whole picture.

Read the full USA Today article: When Does Your heart Rate Become a Concern? Here's When Your Pulse is Too High.