Training Guides

Deep dives into the science and practice of endurance training.

Guide21 January 2026

Cycling Training Zones Explained: What Your Body Actually Does at Each Intensity

Training zones are artificial constructs. Your body doesn't switch gears at a threshold. Learn what actually happens at each intensity and why NUA uses percentages instead of zones.

cyclingpowertraining-theory

Guide21 December 2025

What Is FTP in Cycling? How to Test and Use Your Threshold Power

FTP is a calibration tool, not a performance trophy. Learn what FTP actually measures, how to test it correctly, and how NUA uses it to set your training intensity.

cyclingpowertraining-theory