What if we told you there was one piece of equipment that strengthens your entire body while burning 600 calories an hour–and you’re walking by it every day in the gym?

Almost 76 percent fewer people use rowing ergometers, or “ergs,” than treadmills, even though they burn a similar amount of calories, according to the International Health, Racquet & Sportsclub Association. “People think of rowing as a sport for Ivy Leaguers, but it’s easy to learn and delivers results because it uses so many muscles,” says Josh Crosby, creator of Indo-Row, a group rowing class at Sports Club/LA in Los Angeles. So the next time you see a line for the treadmill at the gym, walk over to the erg and start rowing your way to a stronger, leaner body.–J.D.