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Journal ArticleThe journals of gerontology. Series A, Biological sciences and medical sciences·Jul 2026

A 9-Year Mailed Exercise Program Barely Moved the Needle in Older Women

Key Insight

This study suggests low-touch mailed reminders alone rarely produce big activity changes, especially past age 80.


Nearly 50,000 women aged 66 to 99 were randomly assigned to a long-running, remotely delivered program that encouraged more movement and less sitting. After almost nine years, the group getting the nudges walked and exercised about 3 to 4 percent more and sat about 1.5 percent less. Real, but small. The effect was strongest in the youngest women and faded in those over 80.

Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.