Contributing to a great article from PopSugar, check it out:
“I took about four private workout sessions per week with celebrity trainer David Kirsch. The pro is responsible for sculpting the bodies of celebrities (like Jennifer Lopez and Heidi Klum) and has a wealth of fitness and health knowledge (to recap, he’s written five books, has his own line of shakes and supplements, and owns a top-notch NYC gym). He put me on a routine that was a mix of cardio, strength training, HIIT, and TRX. Every time we met up, the moves and sequences were different, which kept my body guessing and metabolism revved.”