H2O is good enough. I would not like to have any more glycogen available than is stored in my muscles and liver for this. If you worry about going to hypoglycemic carry some GU, powergel, sweettarts or glucose tabs and water with you. Since I bike I take a camel back with water and GU just in case, but will not resort to the GU unless I am literally failing down.
Be careful to keep the intensity low enough and the duration really shouldn't last more than 45 minutes, so maybe a 4-5 mile jog would be the right distance at an acceptable pace.
Will keep you updated. You do the same.
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