ive been lifting for about a month, im one of those lean guys with high metabolisms so i read the bulking up thread n thats what ive been doing. its just some days i feel burnt out, and this isnt once in a while, its at least 1-2 days a week. i always eat well and even when i get 8 hours of sleep sometimes i just dont have the energy i do on other days. on some machines i can max them out, other days i cant even lift it (i focus on free weights, just an example). ne tips or suggestions on how to keep your energy levels up?