Don't know, don't care bout Strava. If you want to compete with others, go enter a race where such things are monitored.
Cynicism aside, I wouldn't really put too much difference between a 65 and a 76 year old recording rides on Strava. Obviously the average 65 year old is going to be fitter than the average 76 year old, but the sample size is generally too small in such things to take any meaningful comparison from it.