I have some horror stories. One gentleman once wore jeans to class—he didn’t have a change of clothing. It was the most uncomfortable ride I’ve ever watched. Another guy came in without a shirt. It was a bit shocking, but he had a nice body, so I didn’t mind.  

The general rule is to wear padded cycling shorts or gym shorts (or gym shorts over cycling shorts), then either a muscle tee or tank. The outfit is lightweight and won’t interfere with your bike. Aside from jeans, avoid khaki shorts, which are constricting. But there isn’t much you shouldn’t wear. Even outdoor cycling shorts are acceptable. Those shorty-shorts show your love for fitness.  

I’ve also seen more guys take their shirts off midclass. That’s fine! If you’re dripping with sweat, take it off. That means you’re getting what you came for, and you’ll probably inspire the person next to you.  

But definitely no jeans!

Jen Barnet is a trainer and owner of XCYCLE spin studio in Las Vegas.