Don’t roll your eyes at this fitness craze—it’s got a pretty cool angle. Orangetheory Fitness is the name, and getting you into the “orange zone” is the game. At each of the company’s 175 gyms nationwide, huge screens overhead display your progress (talk about upping the competitive ante!) as you run, row, and lift your way through an “Orange 60”: an hour-long interval session that pushes you to work at 84% of your max heart rate (the orange zone) or higher for 12 to 20 minutes. Or, we should say, try to: We did—twice—and it’s a ball-breaker from start to finish.
Each session torches 500 to 1,000 calories and keeps your metabolism burning high for up to 36 hours afterward. Costs run about $100 for eight monthly classes, with the first workout free. Check it out at orangetheoryfitness.com.