What is CrossFit?

CrossFit Journal: The Performance-Based Lifestyle Resource


CrossFit Theory

CrossFit is an evidence-based fitness program. Meaningful statements about safety, efficacy and efficiency — the three most important and interdependent facets of any fitness program — can be supported only by measurable, observable, and repeatable facts, (i.e., data). The CrossFit methodology depends on full disclosure of methods,results and criticisms, and we’ve employed the Internet as our primary means to support these values. Our charter is open source, making co-developers out of participating coaches, athletes and trainers through a spontaneous and collaborative online community. CrossFit is empirically driven, clinically tested and community developed.

We offer the world’s most useful definition of fitness: increased work capacity across broad time and modal domains. Capacity is the ability to do real work, which is measurable using the basic terms of physics (force, distance and time). Life is unpredictable (much more so than sport) so real world fitness must be broad and not specialized, both in terms of duration and type of effort (time and modal domains).

Constantly Varied

Constantly Varied because we aim to accomplish GPP or General Physical Preparedness. What is GPP and what does it look like, you ask? It is life. Pick up your kids. Moving the fridge. Running after the garbage truck. And it is the unknown life: whatever life may throw at you, at least physically you can handle it.  But it is also about spicing it up too. Who wants to do the same thing everyday? Legs Monday, arms Tuesday ect… Every WOD is different and a surprise!

High Intensity

High Intensity because Intensity produces Power in athletes and Power is the single most important variable in fitness. The ability to do work and to be generally useful for life. Intensity produces measurable units of work capacity. Watts and Horsepower. By measuring Forces times Distance divided over Time we can arrive at a measurable figure of Intensity and Power. The more Power you produce, the more work you can complete in the shortest period of time. When this method is implemented over many different physical tests, whomever has the highest work capacity may honestly lay claim to the title of “Fittest Man or Woman on Earth.”


  • Movement – How to move safely and effectively.
  • Fitness – What it means to be fit. Its definition, the supporting theories, and how to go about attaining it in real life.
  • Nutrition – Eat meat & vegetables, nuts & seeds, some fruit, little starch, and no sugar. Keep intake to levels that will support exercise, but not body fat.

Education is a big part of CrossFit. When you start, you are not expected to have the knowledge you need.

CrossFit is an education about movement, fitness, nutrition and community. All of these things require responsibility, common sense, and work to educate oneself using all the tools available in the community.

Courtesy of CrossFit Journal @ CrossFit.com