I'm getting roughly 8 hours of sleep. I have no problem getting to bed early, but I don't think I can sleep more than 8 hrs. I'll just wake up earlier.

I'm pretty aware of what I'm eating, so I don't think it's the carb rush, or the 'all the blood is digesting the huge lunch' scenario either. I usually have a banana before leaving the house, some nuts, or a clif bar mid morning, and a small sandwich for lunch. And I'm sleepy despite enough caffeine to kill a small elephant.

Perhaps it is that by body isn't used to the extra exertion. I'll give it time, and hope my body adjusts. If I could take a nap, I would, but if I was caught snoozing, i'd get fired...