About The Study: The findings of this study suggest that maintaining a moderate level of physical activity of approximately 17 metabolic equivalent task-hours/week (i.e., 5 hours of brisk walking or 2 hours of running each week) over 3 decades was sufficient to achieve optimal benefit in reducing digestive system cancer risk.
Corresponding Author: To contact the corresponding author, Edward L. Giovannucci, MD, ScD, email egiovann@hsph.harvard.edu .
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(doi:10.1001/jamaoncol.2025.4185)
Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.
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JAMA Oncology