Ariane Hundt, the top NYC trainer behind Brooklyn Bridge Boot Camp, takes her butt-kicking to paradise, with a week-long wellness retreat to Costa Rica in August.

Now, his sister Sarah Amasha – who is going into the 11th grade at Shenendehowa High School – is in the boot camp. The program is geared toward high school students in grades 10-12.

A new Army program that gives lower-performing 90 days of fitness or academic instruction before boot camp has already helped whip new soldiers into shape and shore up the military's ranks.

Burn Boot Camp members get unlimited workouts with "child watch" offered on-site beginning at 8:30 a.m. Focus meetings to track goals and progress are also included in a membership.