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Zack Sigel is a writer and editor based in New York City. He has been managing editor at Policygenius and M1 Finance, where he led teams specialized in writing about business and finance, and he has ...

Jan. 18, 2026 A long-running Swedish study has followed adults for nearly five decades, uncovering when physical decline truly begins. Fitness and strength start slipping around age 35, then worsen ...