Does anyone know why Zwift sessions would affect the Strava Fitness graph differently to outdoor rides?
I can’t seem to attach an image but, a single ride outside during the summer often made the line rise by 4-5 points. Whereas, every Zwift ride only ever increases it by 1 and sometimes not at all.
On the road I don’t have a power meter, and I see that as the only difference to an indoor ride where my Kickr reads the power.
Appreciate your help,