The Problem With “Just Stay in Zone 2”

Zone 2 training sounds simple: stay easy, build your aerobic base, and get faster over time. But what happens when your watch says you’re outside Zone 2, your heart rate won’t cooperate, or your performance stops improving? In this episode, Coach Justin and Coach Katie break down what Zone 2 actually means, why it is not a universal prescription, and how endurance athletes should think about intensity based on fitness, goals, available training time, and race demands. What You’ll Learn Why “just stay in Zone 2” can become bad advice for the wrong athlete How heart rate, RPE, lactate, and fitness level change what Zone 2 looks like Why training to complete, perform, or compete requires different intensity When easy training builds the foundation—and when you need to move beyond it Timestamps 00:00 — Why Zone 2 is more complicated than it sounds 06:14 — Why athletes get so confused about Zone 2 12:00 — Where modern Zone 2 training methods came from 20:17 — What Zone 2 actually means physiologically 27:23 — Heart rate vs. RPE: how should you judge effort? 33:26 — Why lactate is not the enemy 41:05 — Why Zone 2 looks different for every athlete 43:41 — New runners: stop obsessing over heart rate zones 56:34 — Why coaches should manage stress, not just numbers 57:57 — Complete, perform, or compete? 01:04:06 — Why higher intensity still belongs in endurance training 01:12:58 — When Zone 2 belongs in the plan