updated 06/25/2013 AT 5:00 PM ET
•originally published 06/25/2013 AT 6:00 PM ET
From beach bum to gym rat!
Reformed party girl, Nicole “Snooki” Polizzi, 25 – who showed off post-baby abs at the end of May – is still going strong with her workouts.
“Getting more toned & defined!!” she wrote as a caption. “#muscles #fitlife.”
“How I start my Saturdays #buns & guns,” Polizzi wrote.
In January, the TV personality told PEOPLE about her dedication to fitness.
“I go [to a trainer] four times a week, and we do legs, arms and everything,” she said “And after every one-hour workout, I do an hour of cardio I’m still working my ass off, but it’s all worth it. I’m now motivated and I want to change my body. It’s a good feeling to work out because I feel much better. Plus, my guy Jionni likes it.”