Definition of "heart rate" []

• The number of heartbeats per unit of time, usually expressed as beats per minute. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "These days, aerobic exercise is more often called cardio, a nod to the fact that it accelerates your heart rate and improves your cardiovascular system."
• "Mind-body medicine has been growing in acceptance since the mid-twentieth century, based on research showing that modalities such as stress reduction and meditation, visualization, and biofeedback can lower blood pressure and heart rate and have other beneficial effects as well."
• "Bitter orange contains synephrine, a compound very similar to ephedrine that constricts blood vessels and consequently increases heart rate and blood pressure."