Yeah, LSD = Long Steady Distance, not Slow. Pace should be just below when you start to breathe more quickly. Not low HR, rather aerobic HR. You'll be sweating. OK to go harder on hills, have to, but gear down and spin up, try to keep the HR down. HIIT as the spirit moves you, but not so much that you're too tired for the LSD.
Try medjool dates, Clif bars, anything with lots of carbs, small amounts frequently. I could see the Oreos disintegrating in the jersey pocket. If they don't, fine.
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