In addition to taking the weight loss supplement youthH2O, for which she is a spokeswoman, Lozada said she is eating clean and working out "three or four times" a week.
"I have been sleep deprived lately and going to the gym can be hectic when you have no time in your schedule," she said. "But, on the days that I do have a moment, I do a ton of cardio, weight training -- which I love -- and hiking."
Lozada and Los Angeles Dodgers outfielder, Crawford welcomed Carl Leo, on March 22.
"Carl is a wonderful father and awesome fiancé who has been by my side the entire time," she said. "He is so excited about baby Carl Leo. You should see them together!"
Swim Week Miami Beach 2014 [PHOTOS]