so I'm in my late 30's and - for a variety of reasons - it's clear to me I never reached my potential in the half-marathon and marathon, which I only started in my last 20's (and
between then and now I've had sporadic bouts of training, even missing a few years). I probably have no right to complain, as I had a satisfying college career which ended about as well as I could have possibly hoped...but it's kind of irritating to know that since graduating I never again reached the level I had at that time, let alone surpassing it (maybe I could have run a little faster in the 5k-10K, but that's more speculative...on the other hand I'm sure that my half-marathon and marathon PR's would be faster had I taken them seriously right after graduating). it seems like a petty thing, but I can't shake being annoyed knowing I'm now too old to even have a shot at running the times that I was once capable of in the longer distances but never actually did. anyone have tips (ideally based on experience) for how to let this sort of thing go?