It seems Strava nowadays is only focused on becoming a cyclist Instragram or something.
Which is OK of course, but people are lured into becoming a premium member with all kind of promise...
Completely agree with above;
Bannisters' impuls reaction model is aimed at multisport athletes, so Strava's own explanation for the fitness graph disqualifies the answer given by Elle
For me, this ...
there it is B-)
Great news Elle!