How does aerobic exercise affect resting heart rate?

Aerobic exercise positively impacts resting heart rate by promoting cardiovascular efficiency and health. Regular aerobic physical activities, such as running, cycling, or swimming, lead to adaptations within the heart and vascular system. One of the most significant adaptations is an increase in the heart's stroke volume, which means the heart can pump more blood with each beat.

As a result, the heart does not need to beat as frequently to maintain adequate blood circulation throughout the body during periods of rest. This decrease in resting heart rate indicates improved cardiac efficiency and fitness levels. Individuals who engage in consistent aerobic exercise often find that over time, their resting heart rates lower, reflecting a stronger and more efficient heart.

The notion that there is a moderate decrease is well substantiated in exercise physiology, which supports the idea that aerobic exercise leads to significant adaptations that can enhance cardiovascular health. This is why the impact on resting heart rate is generally characterized as a moderate decrease for those who engage in regular aerobic activities.