Strava fitness graph frequently drops 2 points in one day

[brushi]

Most of the time the Strava fitness graph drops 1 point on days without activities. When reading about the way the Strava fitness graph works this 1 point drop per day is the way it should behave.

However: a few times per month the score drops 2 points in a single day. And this seems "unfair" 😉. 

Does anyone know why this 2 points drop might happen? 

[BryanC]

On this topic I’d be interested in knowing more about the calculation.  A hard ride and it can jump upwards by 7 points.  I walk my dog daily and it still goes down, I swim and it still goes down.  Is the rate of decline related to Relative Effort?   It would make sense to do that (IMHO).  

[brushi]

Thanks, anchskier!

[anchskier · Accepted solution]

It could be that the amount it is dropping is actually more than a single point in a day, but due to rounding, you only see 1 point most days, but 2 every once in a while when the total gets high enough to round to 2.  Just speculating though.