New 47-Year Study Pinpoints When Fitness Begins to Fade (In Your 30s)
TL;DR
A long-running Swedish SPAF study of 427 participants shows peak physical capacity in the mid-30s, with a rise in decline after age 40 and about 30–40% loss by age 63 across aerobic fitness, endurance, and power. Lifelong activity—especially starting in youth or re-engaging later—significantly boosts outcomes and slows deterioration, but the onset of decline appears biologically programmed well before later life, highlighting the value of staying active early in life.
- A 47-Year Study Finally Reveals the Age When Your Body Starts Losing Strength and Endurance The Daily Galaxy
- A 47-year study reveals when fitness and strength start to fade ScienceDaily
- Here's the age when strength and fitness begin fading, long-term data shows Fox News
- This is the age at which you hit peak fitness, say researchers – plus, tips on how to build strength for life Runner's World
- Fitness Starts Slipping At 35, But Exercise Still Helps Later In Life indica News
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