Teresa Giudice Shows Off Super Fit Post-Prison Physique at Tell-All Memoir Launch Party

02/19/2016 AT 12:35 PM EST

Teresa Giudice made her fitness a priority during her nearly yearlong prison stay – and now, she's got the figure to prove it.

The reality star and mom of four showed off her toned physique in a black, cleavage-baring, lace-up dress Wednesday night at 49 Grove in New York City, where she celebrated the launch party for her tell-all prison memoir.

Teresa Giudice Shows Off Super Fit Post-Prison Physique at Tell-All Memoir Launch Party| Health, The Real Housewives Of New Jersey, TV News, Teresa Giudice

Teresa Giudice

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Her husband Joe, 43, was also in attendance in a show of support for the Bravo star's book, Turning the Tables: From Housewife to Inmate and Back Again, which chronicles her sentence at Danbury Federal Correctional Institution, a minimum-security satellite camp for women.

And, according to posts on Twitter, Giudice's sister-in-law Melissa Gorga, as well as fellow New Jersey Housewife Jacqueline and The Real Housewives of New York's Dorinda Medley joined her at the event.

In a recent exclusive interview with PEOPLE, Giudice, 43, explained that working out became a vital way to pass the time in jail and helped her get in the best shape of her life.

"I tried to stay busy. I would work out three times a day. That was my thing," Giudice said, explaining that her day started out with daily yoga sessions (the prison held two classes each morning in the TV room), then different workouts depending on the season.

"In the wintertime I would go to the gym, and in the spring and summer I was constantly on the track walking or running," Giudice added.

RELATED VIDEO: Teresa Giudice Taught Exercise Classes in Prison!

But of all the workouts, the Real Housewives of New Jersey star said yoga was the one that changed her life.

"It got me though this whole ordeal, and I can't live without it now. I already signed up to get certified as a teacher," she said.

And it all paid off, said the star: "I was bigger. Now I'm leaner and more toned. I think I only lost 8 lbs. because it's mostly muscle, but I'm a size 2 now."

RELATED VIDEO: Teresa Giudice Tells All!

As for her diet, Giudice said eating healthy wasn't always easy: In the morning, the options were oatmeal or bran cereal. For dinner, the choices ranged from hot dogs to tacos, and occasionally salad would make it onto the menu.

"In the beginning I tried everything, and then I started staying away from the meat," she said, adding that she "was starting to cut out the carbs, so it worked out anyway."
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