A few people at work are doing it and swear by it. Has anyone done this?
Welcome to CrossFit: Forging Elite Fitness
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CrossFit is a strength and conditioning fitness methodology. Its stated goal is to create "the quintessential athlete, equal parts gymnast, Olympic weightlifter and sprinter."[1] Crossfit is not sport-specific. It promotes broad and general overall physical fitness. CrossFit does not use weight machines. It features varied high intensity workouts based on functional movement. Most workouts last 20 minutes or less.
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CrossFit - Wikipedia, the free encyclopedia
I'm intrigued, since I want to stay in shape, but I don't have more than 45-60 minutes to do it.