Zone 2 Training: The Underrated Engine Behind Elite Endurance
Peter Attia logs 4–5 hours of Zone 2 cardio every single week. Kipchoge builds 80% of his mileage there. Yet most people sprinting on treadmills or grinding HIIT sessions are skipping the one training zone that compounds fastest over time. Here’s what Zone 2 actually is, why it works at the cellular level, and how … Read more