ISS and Fulgaz Toughness Score
I regularly use Xert to adapt my training scope to my current performance and to maintain my fitness to some extent at the age of 82.
In the indoor area I train with my Wattbike Atom X and Fulgaz. I use Xert workouts with timed Fulgaz videos. At various events associated with Fulgaz (e.g. Hope Cycle Tour often Australia 2022), however, I drive without the ERG mode and regulate the load with the gear shift.
Now Fulgaz also offers workouts, which are already connected with suitable videos. The expected total load of a workout is evaluated with the term “Toughness Score”. When using the Xert workouts, I see the value “XSS” as the total load.
Which ISS value results from the Toughness Score, as far as the values are comparable with each other at all?
Would it even make sense to use a value converted from XSS to Toughness Score for my XERT training and then train with a comparable Fulgaz workout?