As well as riding in the 'Zones' you can also try to 'Beat the Class'. Each class is given its own COL% (CicloZone Output Level) intensity. Class COL% levels begin low at around 65% and go as high as 88%. The COL% is set by our onboard Ai training system based on the difficulty level of a session in terms of Zonal Intensity, RPM in those Zones and whether you are seated or standing.... you can challenge yourself to beat the class COL% with your Rider COL% by staying in the correct Zonal intensity and also the correct RPM ..... We make this easy as all the RPM levels for all intervals is the same as BPM (beats per minute) of the music.