Why does MHR decrease with age? Exploring the biological reasons
A progressive decline in maximum heart rate (MHR) is a fundamental, and generally unavoidable, aspect of aging for both humans and other mammals. It is not a sign of poor fitness, but rather a result of natural physiological changes within the heart's electrical system, structural components, and hormonal responses. This article explores the biological reasons behind why MHR decreases with age, affecting everyone regardless of lifestyle or physical conditioning.