Variability Index (VI) 

Description:

A measure of how consistent one's power output is during cycling. VI is simply calculated by dividing normalized power (NP) by average power (AP). Average power is proportional to speed while normalized power is a close representation of how physiological fatiguing the ride was.

Syntax:

vi   <returns variability index for selection>

Additional Syntax:

coming soon

Common examples:

Variability Index is a summary metric that can be used at both the athlete and workout levels in both charts and reports.