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LIFE2026-03-225 min read
Why Longevity Thinking Starts at 40
The decisions you make between 40 and 60 determine how you will move, think, and feel at 80.
Peter Attia calls the period between 40 and 60 the Decade of Power. It is the window where your health decisions have the greatest impact on how you will live in your 70s, 80s, and beyond.
The Problem
Most people do not think about longevity until something breaks. A back injury at 50. A scary blood test at 55.
The Sway Perspective
Longevity is not about living longer for the sake of it. It is about maintaining the ability to do the things you love.
Research shows that cardiorespiratory fitness in midlife is the single strongest predictor of all-cause mortality.
What You Can Do Today
Test your grip strength. It is one of the strongest predictors of all-cause mortality, and you can measure it cheaply.