Maybe, just maybe, you are already a 5x runner. I certainly can't run any appreciable distance (which I am assuming here as running for just a few seconds isn't

Maybe, just maybe, you are already a 5x runner. I certainly can't run any appreciable distance (which I am assuming here as running for just a few seconds isn't interesting) at speeds anywhere close to that... I am the running equivalent of the 0.1x programmer who is super excited by their Excel spreadsheet ;P.