What happens to the heart as a long-term effect of regular exercise?

The heart gets bigger and stronger as a long-term effect of regular exercise due to a process known as cardiac remodeling. When an individual engages in consistent physical activity, particularly cardiovascular exercise, the heart muscle adapts to handle the increased demand for oxygen and blood flow during exercise. This adaptation leads to an enlargement of the heart chambers, especially the left ventricle, which allows the heart to pump a greater volume of blood per beat.

This physiological change enhances overall cardiovascular efficiency, improving endurance and reducing the heart rate at rest and during exercise. A stronger heart can perform better under stress, reducing the risk of heart-related diseases over time. Hence, the increased size and strength of the heart muscle contribute to better health outcomes for individuals who maintain a regular exercise routine.