How Exercise Grows a Healthy Heart

It's well known that exercise results in cardiovascular benefits. But until quite recently, scientists understood very little about how physical activity actually influences your heart. However, a new study offers some of the first molecular-level insights.

The research suggests that exercise turns on a genetic program that leads your heart to grow as heart muscle cells divide. This means that there may be ways to optimize training regimens so that they tap into this natural mechanism more efficiently.

Eurekalert reports:

"That finding is key given that there is little prior evidence showing that the increase in heart size with exercise has direct benefits, the researchers say. The new evidence also gives important biological insights into the heart's potential for regeneration of muscle."

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