What is CrossFit? CrossFit is an effective way to get fit. Anyone can do it. It is a fitness program that combines a wide variety of functional movements into a timed or scored workout. We do pull-ups, squats, push-ups, weightlifting, gymnastics, running, rowing, and a host of other movements. Always varied, always changing, always producing results. Kids, cops, firefighters, soccer mums, Navy SEALS, and grandmas all do CrossFit. Courtesy of CrossFit Inc.