You’re wrong.

Welcome to Tone House, the hardest workout in New York City.

Bathed in red light, you’ll breathe harder than in any other class in town, you’ll sweat profusely as you carry the weight of a 70-pound harness on your back and you may even see black spots in between sets. But, you’ll be back for more.

Founder Alonzo Wilson lettered in every high school sport and went on to play college football. He now models for Wilhemina (that face, those guns!) and in conversation, he’s surprisingly soft-spoken for someone who designed a workout so crazy fierce.

The 15-minute warm-up consists of several rounds of hurdles, like these.

Then, there are pushups and burpees wearing the harness, strapped to the wall.

And, sprints back and forth across the studio, followed by resistance exercises using TRX bands that leverage your full body weight.

You’ll do all of this for an hour until it’s time to stretch and gather for one last team huddle signifying “game over.”

But, if you’re like me, the next morning, as you tell your friends about your more-than-grueling evening the night before, you’ll maybe, just maybe, also check the schedule.