An article in the British Journal of Sports Medicine titled Low-carbohydrate diets for athletes: what evidence? reviews the studies done on the performance effects of low-carbohydrate diets. There are very few of such studies and most are not well designed.
What we particularly enjoyed about this paper was its questioning of the conventional wisdom that athletes need to consume carbohydrates. It also raised questions such as the adverse effects of carbohydrate consumption as well as the often un-thought about benefits of a low-carb diet (prevents insulin resistance, effect on the immune system, weight control, and so forth).
Discuss this post on our forums.