I read an article on SimplyShredded that claimed that the type of carbohydrate doesn't matter, but rather only the amount of carbs matter to bodybuilders. In the following excerpt, the author claims that exercise performance does not differ with carbs of differing glycemic index.
Nope, not even endurance exercise performance is affected by the GI of the food eaten before the training session. Neither do beta-endorphin levels, rate of perceived exertion, heart rate, ventilation, lactate, respiratory quotient and substrate oxidation rate. For anaerobic strength training, the GI of the carbs you eat makes absolutely zero difference in the gym. The whole ‘needing carbs for energy’ thinking is in your head anyway.
This seems to go against other books I've read and videos of pro bodybuilders I've watched. In these books and videos, they always say to eat low GI foods (yams, whole grain) throughout the day for stable energy levels and high GI foods (fruit, sugar) after working out for recovery and shifting to an anabolic state.
So who is right? Does the GI of a carb matter or not to bodybuilders?