How Zone 2 Training Works: The 4 Key Adaptations
Combat FitnessPublished on: 22/01/2026
Zone 2 training builds mitochondria, fat metabolism, and cardiac output—the aerobic engine behind every endurance task. Learn how it works and how to use it.
zone-2-trainingtraining-zonesendurance-trainingaerobic-capacityheart-rate-trainingtactical-fitnessmilitary-fitnessrunningruckingconditioning