Heart rate

Heart rate is the number of times a person's heart beats per minute (bpm), a fundamental measure of vital function and a window into Oxygen delivery throughout the body. In humans, a resting heart rate typically ranges from 60–100 bpm, though athletes may sit lower. Heart rate responds dynamically to physical exertion, emotional stress, metabolic demands, and health conditions.

Monitoring heart rate reveals insights into cardiovascular fitness, stress levels, and disease risk. Athletes use it to optimize training zones; clinicians track it as a diagnostic sign; wearable devices have made continuous measurement accessible. Abnormal rates—too fast (Tachycardia) or too slow (Bradycardia)—signal conditions ranging from anxiety to cardiac pathology.

The heart's electrical system, mapped by instruments like the EKG, governs this rhythm. Heart rate varies across species, correlating with body size and evolutionary history: hummingbirds exceed 1,000 bpm while blue whales drop below 10.

Understanding heart rate bridges physiology, personal health metrics, and the ancient wonder of the pulse—that felt echo of life itself.

Related

Cardiovascular system, Blood pressure, Stress response, Metabolism, Arrhythmia