The SPAN Formula: How I Discovered the Exact Mix of Sleep, Exercise, and Nutrition That Adds 9 Years to Your Life Last January, a massive study dropped in The Lancet’s eClinicalMedicine journal that fundamentally changed how I think about longevity. Researchers had finally cracked the code on the precise combination of daily habits that determines how long we live—and more importantly, how long we live HEALTHY. They called it SPAN: Sleep, Physical Activity, and Nutrition. The numbers were so specific they felt almost too precise to be real: 7.2 hours of sleep, 42 minutes of exercise, and a diet quality…