CrossFit has defined fitness.
Always changing the workouts, never letting your body adapt. This is why CrossFit is great for getting results. Your body never gets used to anything so you never reach those plateaus.
This is where many misconceptions about CrossFit come from. Many people think intensity is screaming and yelling and looking like you are going to pop a vain in your neck. This is not intensity although it may sometimes be the result of intensity. Intensity is the act of creating power (power = force multiplied by distance divided by time). In basic language we are saying power/intensity is how much weight you can move over the longest distance in the shortest amount of time. Our goal is to create people who can run farther, move more weight, do more push-ups, flip a tire faster, all while of course maintaining proper form and technique.
Are movements humans were built for. Movements that are natural and safe. Movements we use in everyday life such as squatting, deadlifting, pulling yourself up, etc. This is NOT standing on a Bosu ball on one leg doing bicep curls. This is NOT sitting in a machine that holds you in place while you execute a movement that isolates one muscle leaving your body unbalanced with useless strength. These are movements that promote neurological and hormonal responses, leading to better health, actual strength, actual core stability, agility, and flexibility.