Christy posted the following comment/question:
Why is it that most Crossfit sites don’t think eating a Zone diet that is vegetarian is effective? Yet Dr. Sears says that incorporating more soy protein into your diet as part of a Zone diet can actually be more effective than meat sources of protein?
Good question, here’s the deal:
1-Failure to thrive. I have seen 2 crossfitting vegans who were able to pull it off and have what I’d consider top-tier performance. Most do not. This based on nearly 9 years of coaching people and working with what amounts to thousands of people now. So, can it be done, yes. Is it easy OR better than a mixed diet? Absolutely not.
2-Lack of variety. Christy, if you had not noticed, we talk a bunch about topics extending well beyond performance. There are people who happen onto this information who are VERY sick and who benefit immensely from the change to a paleo/zone diet. You will also notice that it is the EXCLUSION of things like soy that facilitate this shift. The two example I cited above, of the “successful” vegan crossfitters, they had “no” variety in their diets. This leads to food intollerances especially when the food is some kind of concentrated legume food like tofu.
3-Barry Sears is right on with some stuff, completely wrong with other stuff. He completely ignores post work out nutrition, fasting and host of other topics because it does not jibe with his over-arching scheme. He wrote the Soy Zone, sang the song of soy…then dropped it when issues like thyroid disregulation began come to light.
My take on this is try everything. Crossfit for a month and do it vegan. Do it for a month and do it paleo. Do it for a montha and follow the high carb, low fat ADA plan. See how you do.
What I’m putting forward may seem like dogma to some, and I guess perhaps it is, but it is dogma won from experience and experimentation. I’ve done vegan, i’ve done high carb-low fat….I DO paleo. What have YOU done?