2. How to Interpret it?
A single number is just a metric but to get conclusions you need to compare to another number. We did compare Normalized Power (NP) to Average Power from the workout.
The result from it is Variability Index (VI). Variability Index should be always higher or equal to 1, (you can see it lower than 1!*)
!*Note. If your bike computer is set up to “don’t include 0 in average power” it can mess up Variability Index!
because Average Power will be higher than Normalized Power what give us VI lower than 1. It is the wrong data to interpret.
Variability Index can be from 1.00 to around 1.40.
1.00 is a perfectly steady workout, that how we would like to race time trial.
1.00 – 1.05 is a standard time trial.
1.05 – 1.15 is a casual workout.
1.15 – 1.20 is a typical road race.
1.20 – 1.40 is a mountain bike race.