« Before you test
You’re making do with estimates. Maybe you’re using formulas or your device-established zones, online calculators, or field tests. You kind of know your zones, but you’re not 100% sure where your fitness really is or how to get the most out of your training.
After you test »
You know your aerobic and anaerobic thresholds. You have accurate training zones for heart rate, pace, and power. You understand when and how to use them. You train with confidence, measure your progress, and stop wasting time on junk miles.