Researchers analyzed data from over 10,000 athletes to see how high-intensity physical training affects the heart. The study looked specifically at young female athletes between the ages of 18 and 35. They compared these women to both male athletes and women who did not participate in intense sports.
The results showed that female athletes had larger heart chambers and more muscle mass in the heart compared to women who were not athletes. These changes are common signs of how the heart adapts to heavy exercise. However, the study also noted that some specific electrical patterns on heart tests were more common in Black female athletes than in other groups.
Because this was a review of existing observational data, it shows a link between training and heart structure rather than proving one causes the other. These findings help doctors establish what is normal for active women. If you are an athlete, talk to a healthcare provider to understand how your specific training affects your heart health.