I've just started a fitness 'bootcamp' class at my school gym. Though the physical pain involved is bearable (even sorta fun, in a twisted sort of way), the psychological component is kinda rough. Several of my classmates could no doubt themselves be fitness instructors/ swimsuit models -one of the perils of living in southern California, I guess- and I just feel so very bad at this whole business.
The relay part of the class, where each crab walk, do these crouchy-jumpy things, walking pushups, etc. up and down a short track, is the worst; the fit people in the class, long finished, chat and take water breaks, all the while looking reasonably composed, while I stream sweat and make pathetic noises, hauling myself along. Ach. Like a flashback to middle school. Well, when I wasn't hiding out somewhere or pretending to have cramps...
But, it's all for the good, I think. Being conspicuously bad at something -and learning not to care- can be good for the character, I think. And the exercise really does feel pretty good.