CrossFit is a branded fitness regimen created by Greg Glassman and is a registered trademark of CrossFit, Inc, which was founded by Greg Glassman and Lauren Jenai in 2000. Promoted as both a physical exercise philosophy and also as a competitive fitness sport, CrossFit workouts incorporate elements from high-intensity interval training, Olympic weightlifting, plyometrics, powerlifting, gymnastics, girevoy sport, calisthenics, strongman, and other exercises.

However, on a broad general overview CrossFit is, a strength and conditioning program consisting mainly of a mix of aerobic exercise, calisthenics (body weight exercises), and Olympic weightlifting.

CrossFit, Inc. describes its strength and conditioning program as: Constantly varied Functional movements executed at High Intensity across broad time and modal domains, with the stated goal of improving fitness, which it defines as “work capacity across broad time and modal domains.