Fitness boot camps taking it to the parks - Fitness - MSNBC.com: "NEW YORK - It was a balmy spring evening in Manhattan. Rockefeller Park teemed with joggers, dog walkers, picnickers, Frisbee throwers — and six women sweating through jumping jacks and park bench push-ups. “Let’s go!” shouted instructor Mauricio Genore. “Get down! Hands under your glutes!” The women are clients of Stacy’s Boot Camp, one of a growing number of “boot camp” programs that take the workout out of the gym and into parks and other outdoor spaces."