We will occasionally hear comments like this from people who are new to CrossFit, and there’s a reason for that. Almost all Circuit, Toning, Body for Life programs come out of bodybuilding. Bodybuilding is built around lengthy isolation workouts with the goal of achieving a particular look. There is nothing wrong with this, if you want to be a bodybuilder. When we say lengthy, we are talking about 15 hours and more A WEEK of work outs that by design do not help you move better, become faster or more flexible, or gain any real functional advantage. With CrossFit you are working maybe 4 hours a week, and NEVER doing any isolation movements. CrossFit is all about training functional movements that will allow you to get faster, stronger, leaner, more flexible and balanced. CrossFit is based on seemingly random exercise choices, and with that you may have weeks where you are doing a ton of pull ups, and weeks where you will do none. This keeps you in a place where your body never adapts, so it keeps getting better and better. So if you think you know what WOD will be your next, based on your last, think again.
Courtesy of http://www.livelongcrossfit.com