Im with Derwyddon,
I do long distance running as well as track and have tried G-ade before because a few of my track buddies were just going nuts over it. so i did but i also made them drink nothing but water for the race while i had G-ade. At the end of the race i swore never to touch the stuff again and my 4 buddies swore never to touch G-ade again.
I knew before i tried it that it would only hinder my performance.