You're a former high school star athlete who put on a massive amount of weight after graduation, and your former coach forces you to exercise in your old uniform to embarrass you for being such a hog.
I see this scenario being discussed alllll the tiiiiime on Grommr, so I figured I'd contribute. Because of using Grommr as inspiration, this audio is more intended for a male listener, but it's mostly unisex up until the last minute or so.
I do plan on doing a more general ex-jock/ex-athlete teasing audio at some point for my main channel, since it's such a popular theme. But we'll get there when we get there.