very cool nutritional article about athletic performance and lower carb intake dieting. It would seem as though all the carb loading is not entirely necessary. The article also delves into paleolithic or hunter/gather dietary evidence, which I personally prescribe to the evidence for genetic code nutrition is very compelling.
the article in question
http://www.nutritionandmetabolism.com/content/1/1/2
hunter/gather dietary evidence
http://en.wikipedia.org/wiki/Paleolithic_diet