COL% (CicloZone Output Level) is our own metric for class execution. It tells you how well you performed against the class's target zones — in a single, fair number that lets you compare any ride against any other. It's built on the Functional Threshold Power and zonal power-training methodology of Hunter Allen and Dr Andrew Coggan, expressed as a CicloZone score.
In plain language
For each interval, COL% combines four things:
Zone intensity — were you in the target power zone?
RPM — were you at the target cadence within that zone?
Riding position — seated or standing as the class specifies.
Interval duration — how long you held it.
The result is expressed as a percentage of your ability (based on your FTP).
How class difficulty is graded
Classes are graded across the library so you can pick the right level:
Easy sessions — sit around 65–72% COL%.
High-performance sessions — 80%+ COL%.
Warm-up and cool-down intervals are excluded from the calculation.
Why COL% is fair
COL% unifies riders. Because it's a percentage of your own ability, it lets riders compete on the leaderboard regardless of gender, height, weight, or absolute power. Every rider is measured against their own potential, not the strongest person in the room.
During a class
The COL graph on your Rider Dials shows your live COL% relative to the class's expected baseline — so you can see whether you're under, on, or over the target at any moment.