How does recreational activity in girls affect breast cancer risk according to Columbia University?

Columbia University research suggests that at least two hours of weekly recreational activity in adolescent girls is linked to lower breast density and reduced stress markers, potentially lowering future breast cancer risk.

What is breast density and why is it important for breast cancer?

Breast density refers to the amount of fibrous and glandular tissue versus fatty tissue in the breasts. Higher breast density, which forms in adolescence, is a key indicator and heightens breast cancer risk.

Are Black and Hispanic girls more at risk for breast cancer?

Yes, Black and Hispanic girls are disproportionately at risk and tend to report lower levels of recreational physical activity compared to their non-Hispanic white peers.

Home / Health / Teen Girls' Activity Cuts Breast Cancer Risk

Teen Girls' Activity Cuts Breast Cancer Risk

19 Jan

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Summary

Two hours of activity weekly linked to lower breast density.
Activity in adolescence may reduce stress markers.
Black and Hispanic girls report less activity.

Teen Girls' Activity Cuts Breast Cancer Risk

New research from Columbia University indicates that recreational physical activity during adolescence may significantly impact future breast cancer risk. The study found that girls who engaged in at least two hours of weekly activity exhibited lower breast density and reduced stress biomarkers. These findings suggest a protective effect that is independent of body fat.

Breast density, a key indicator of breast cancer risk, develops during adolescence. The study's participants, nearly 200 Black and Hispanic girls in New York, aged around 16, provided urine and blood samples. Those with higher activity levels had lower water content in their breasts, a marker of density.

This research comes as breast cancer rates are increasing among adults under 50 in the U.S., with a notable spike in 2016. The findings highlight a critical need for increased physical activity among adolescent girls, especially within Black and Hispanic communities where reported activity levels are lower.