How Beau ‘Casper’ Smart Got His Six-Pack

06/15/2015 at 06:52 PM ET

Casper Smart GNL Studios

Even though Beau “Casper” Smart is best known for being a choreographer, dancing is actually not his go-to workout when it comes to staying in shape.

It takes more than hitting the studio floor to get a toned physique, he says.

“All the dancers that I work with that have great bodies, they all go to the gym after or before rehearsal,” the Fake Off judge tells PEOPLE, explaining that dance rehearsals include a lot of downtime. “Instead of keeping [your heart rate] up for 45 minutes, you go up and down.”

That’s why Smart incorporates boxing into his routine four to five times a week — to supplement his choreography of stage shows and music videos.

“Boxing is by far the hardest workout I’ve ever done in my life,” he says. “I just got hooked on it.”

He also lifts weights three or four days a week to build up muscle.

“I can’t get the size with boxing,” explains Jennifer Lopez‘s on-and-off boyfriend. “It’s so much cardio that you just get thin, so I have to still do the weights.”

And he kicked his entire routine up a notch when  he was training to play a boxer in the upcoming film Street.

“I was boxing and fight-training for an hour and a half a day, and then I would go shoot for 12 hours,” he says. “After the shoot, usually around midnight or 1 a.m., I would go to the gym for an hour or an hour and a half, then I would hit the sauna for 15 minutes, and then I would sleep for 6 hours and then start over!”

Smart is also mindful of his diet, eating mostly lean protein and vegetables — and he makes sure to always stay hydrated.

Casper Smart GNL Studios

“I try to drink a gallon of water a day,” he says. “Food-wise, no sugar, no carbs at all.”

However, that doesn’t mean he doesn’t allow himself a cheat day.

“I have a sweet tooth, so I’ll do dark chocolate,” says Smart. “I try to keep it to a minimum. For the movie, I did apples and peanut butter, so that was my sugar – I got the protein, the fatty [food] I wanted, and the sugar I was craving, and I would eat it like four times a day!”

Lastly, he emphasizes the importance of getting six to eight hours of sleep a night.

“When you’re on a strict diet, you have to sleep!”

Gabrielle Olya

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Showing 7 comments

itsallgood on

Ok we know where he get his six pack, but we all know the deal. She refuse to accept she has been duped. He enters her front door but we all know his secret. Jen from the block, Now go look who’s coming in the back door, lol

Molly on

He looks amazing! He’d better if he wants to keep JLo around.

Taylor on

Nice job JLo, now if only you could get him not to say anything, he’d be a lot more attractive.

Sara on

This guy is so so so fugly! Come out of the closet already. Jennifer, you don’t have to have a man 24/7 show your daughter you can be independent. By the way, Mark Anthony looks 10 million times better than casper the kidddd!

junker on

as if anyone thought dancing would give you great abs, duh, of course you have to lift, and NOT EAT.

Megan on

Whatever, his face is so annoying and looks pretty cheap.

Beatrice on

He is soooooo UGLY!!!!!! What does she in him? Please tell me! He/She isn’t all that! Get a real man JLO!

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