The fittest people had the lowest mortality rates—by a surprising margin. ... This study found that someone of below-average VO2 max for their age and sex (that is, between the 25th and 50th percentiles) is at double the risk of all-cause mortality compared to someone in the top quartile (75th to 97.6th percentiles). Thus, poor cardiorespiratory fitness carries a greater relative risk of death than smoking.
The Author of this Quote

Author
Peter Attia
Physician, Speaker, #1 New York Times Bestselling Author of Outlive: The Science and Art of Longevity, Founder of Early, CoFounder of 10 Squared, and Podcast Host of THE DRIVE