Knowledge Base


Testing, whether physiological tests performed in a lab or field tests done on the road, offer invaluable information to help you gauge your form, inform your training, and plan your race schedule.

To learn about YOUR physiology, talk with our coaches.

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Do All Athletes Need Regular Blood Testing?

Blood tests can help tell whether an athlete is overtrained or performing at their best, but is it a good idea for athletes to do regular testing? We discuss with Dr. Lauren Rudolph.

Lessons From The Lab title card

Lessons from the Lab

The lab simplifies the path forward for the athlete, showing how the body is responding to training and taking us back to the basics.

blood in test tubes

Demystifying Your Blood Profile

A blood profile can help athletes track progress and diagnose issues—but they need to know what to look for and work with a physician to interpret the data. This article will help to demystify your blood profile.

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.

A cyclocross rider rounds a bend through tall grass.

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.