Endurance Physiology

A physiology-first guide to heart rate zones and mitochondrial adaptation for cyclists.

Build aerobic durability with clear Zone 2 targets, session structure, and execution cues.

Learn how cycling power zones translate watts into precise training stimulus. This practical, science-based guide explains FTP and alternatives, a 7-zone model, workouts by zone, pacing with power vs heart rate, and how adaptive coaching (like N+One) uses zones to maximize gains without burning out.

Learn how to set and use cycling heart rate zones (LTHR-based), combine HR with power and RPE, avoid common pitfalls like drift and lag, and apply adaptive, data-driven rules to get faster without burning out.

Keep Zone 2 honest. Practical, science-based steps to prevent power meter drift on multi-hour rides—temperature compensation, torque checks, battery care, in-ride verification, and post-ride analysis.

Zone 2 (low-intensity) rides are the most efficient way to build a durable aerobic engine. Learn the physiology, metrics, and practical plan for effective Zone 2 training.

Lactate threshold, not VO2max, predicts sustainable performance. Learn the physiology, testing options, and actionable training protocols to shift your threshold and expand functional reserve.

Learn how VO2max training cycling (3–8 minute intervals at ~106–120% FTP) raises your aerobic ceiling. Science-backed session templates, periodization tips, monitoring, and recovery guidance for intermediate to advanced cyclists.