Random thought from my run today - "At what point can I reasonably start to wonder if I'm running as fast as I'm capable of?"
There's obviously an intrinsic limit on the maximum speed anyone can run at, and a level at which we will plateau even with optimal training. And we know that for the fastest distance runners it comes somewhere between 4.15mm and 5mm pace, depending on gender and race distance.
That's the top end of the scale. But what about the rest of us? Is there a lower limit on maximal performance? Is there a mile speed that, say, 95% of able-bodied young adult men or women (assuming there are two overlapping bell-curves, and that is just an assumption on my part) ought to be able to achieve with appropriate training? And if so, where are the actual numbers to be found?