Knowledge Base

Physiology

Humans aren’t machines—we’re much more complicated. Exercise physiology involves changes in the body from exercise and rest.

From anaerobic threshold to environmental acclimatization, from FTP to PGC-1 alpha, we explore the science of human performance.

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Physiology > Testing

FTP Testing

Structured Workout: 20-Minute FTP Test

Are you ready to suffer? Join us for a climbing time trial up the infamous Alpe du Zwift during which we’ll execute an FTP test.

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Fast Talk Podcast Q&A

Mission Impossible: Determining Your True Threshold

How accurate are threshold numbers? And why is it so difficult to find accurate threshold numbers? We discuss several common ways to find your threshold and their pros and cons.

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