These high-intensity, get-tough workouts, modeled after military-style training, include cardiovascular, strength, endurance, and flexibility exercises. They combine indoor and outdoor sports-type drills and calisthenics, and class members move from one exercise to the next with little to no rest. "It's a bunch of people looking to get in shape really quick, and they're going to work hard and sweat," says Neal Pire, an exercise physiologist who teaches a boot camp for baby boomers in New Jersey. "People don't need to be intimidated by the concept—they're not going to be yelled at by a drill sergeant who steps on them and tells them to 'drop and give me 20.' It has evolved from where it started, and it really can be for everyone."
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