Where fitness trends are concerned, NYC is pretty much always ahead of the curve. SoulCycle? Invented it. ModelFIT? That was us, too. So after hearing murmurs of a workout craze sweeping the rest of the nation, we were intrigued. (And only a tad annoyed.)

It’s called Orangetheory Fitness, and it’s now open in Chelsea.

The goal of the workout is to keep your heart rate within the “orange” zone (between 84 and 90 percent of your maximum). By doing so, you optimize the afterburn effect, or your increased metabolic rate post-workout.

After strapping on one of the heart monitors, you dive into 30 minutes of cardio (divided between a treadmill and a rowing machine) and 30 minutes of strength training. The whole time, names and heart rate zones are displayed on a screen for your reference (and for the competition-obsessed). Instructors and the machines' screens give tips on how to stay in the orange zone. 

After a recent class ($34), we were tired, but the workout was manageable--kind of like a Barry’s class taken down a few notches. But of course if you're an out-of-towner reading this, you probably knew that already.

Orangetheory Fitness, 124 W. 23rd St. (between Fifth and Sixth aves.); 646-588-0133 or orangetheoryfitness.com

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