Combining the CrossFit training methodology with a food plan of meat and vegetables, nuts and seeds, some fruit, little starch and no sugar brings "a jet stream of adaptation," says CrossFit founder Greg Glassman.
"Each level builds on the level below it," explains Nicole Carroll, director of certification. "If your nutrition sucks, these things will not be where they could be if it were more solid."
Likewise, Glassman says CrossFit favors Barry Sears' Zone Diet "because it does give me accurate and precise prescription for caloric intake and, more importantly, the exact levels of macronutrient that I can start at."
Likewise, trainers and coaches could make knowledgeable selections on the right way to tweak an athlete's food regimen for improved performance, he says.
CrossFit HQ coach Pat Sherwood says nutrition isn't an both/or facet of training.
"It's not quality or quantity. It can and it should be both."