11/26/2025
Participants who engaged in roughly 90 minutes of resistance training each week had telomeres associated with being 4 years younger biologically than those who did no strength training.
Why this matters:
• Telomeres act like protective “caps” on your DNA.
• They shorten as we age, and faster with stress, inflammation, and inactivity.
• Strength training appears to help maintain telomere length, supporting slower cellular aging and improved longevity.
Building muscle is also building youth at the cellular level.
Reference:
Telomere Length and Biological Aging: The Role of Strength Training in 4,814 U.S. Men and Women. 2024. PMID: 39596838