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 > Interval Workouts

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.

Fast Talk interval Chris Case

This Is an Interval

Trevor Connor revisits the fundamentals of aerobic versus anaerobic pathways, and helps us understand more advanced principles of interval training.