The gyms issue

These spin classes will take you to hell and back, all while pedaling on a stationary bike.

Look like a million dollars, baby, after some butt-kicking kickboxing.

These abs classes will get you so ripped, you'll want to bring back the half-shirt.

Shake your moneymaker at these dance-based classes.

Make like Michael Phelps at these lap workouts around the city.

Eight of Chicago's sexiest fitness instructors flaunt their best assets.

One week into the new year, and your motivation is already waning? These gym extras will give your group workouts a healthy shot in ...

A gym loner gets in the mix at a group jump-rope class.