Of course a large part of Crossfit is about nutrition. I have only recently started to really pay attention to my diet after several years of figuring that I was in good enough shape to not worry about it. With that in mind, I have begun doing some bedtime research and reading on the topic. First thing that I notice is how nutrition might closely follow (1) religion and (2) politics in terms of a way to cause angry debate (loud noises). While I haven't committed to a full Paleo diet or The Zone diet, I have begun using some of their basic principles and had good results.
Dr. Sear's Zone research has some interesting stuff on hormonal effects of carbohydrates v. protein v. fat. His main case-in-point: Americans consume significantly less fat than we did 15 years ago and yet we are only getting fatter, doesn't it seem that the high-carb, low-fat concept has failed us?
In the other camp is T. Colin Campbell and his crew with The China Study. Their research in China seems to promote the idea that animal fats contribute to cancer, heart disease, etc. Today, I stumbled on an interesting rebuttal to Dr. Campbell's work . The rebut-ist (Denise Minger) uses Campbell's own data and uses some seemingly simple correlation calculations to find that Campbell is either deliberately or innocently drawing the wrong conclusions. It's a very long read and I'll admit to only having skimmed it.
Through my own reading and personal experience, I'm falling closer and closer to the Paleolithic and Zone solutions of more lean protein, more fresh produce, more nuts and avocados and avoid cereals like the plague. I've almost entirely cut out bread, pasta and the like from my diet (though I will readily cheat without remorse for anything that looks too good to pass up). My blood sugar has finally quit causing problems and I feel better during my workouts than ever.
Maybe there is something to the whole nutrition thing. It just seems that there is an awful lot of stuff to lead us astray.
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