On the electrolyte front, I just saw some stuff in the LBS, and I forget the brand, but it was electrolytes without the carbs. So, if you don't need the energy from the carbs, you don't get the calories of the usual electrolyte drinks like Gatorade.
It was in little tubes or bottles to be added to your water... but I forget the name.
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Slow Ride Cyclists of NEPA
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