| How to keep glucose levels in line while exercising is definitely one of those "your mileage may vary" types of things. If you are taking insulin, you have a whole range of concerns to deal with that most likely will not be an issue if you are not taking insulin. (There are a number of threads on this forum that address insulin and exercise.)
I also exercise pretty vigorously most days and I have never had to carb load -- nor have I ever gone low from exercise. Today I jogged for just over 30 minutes followed by strength training exercises (the dreaded weights) for about 45 minutes. The end result: a reading of 82 mg/dl, which is perfectly fine. I generally get the same results on pure cardio days, too, when I run for longer periods than today. But then again, I take 15 mg of Actos daily, not insulin or a sulfonylurea, so that's about as low as I seem to be able to get. But even when I took glyburide (a sulfonylurea), exercise didn't cause me to go dangerously low -- sometimes I would end up in the 70s, but it's not like readings in the 70s are dangerous. Plus, glyburide would sometimes send me in the 60s and 70s for no reason at all, which is the main reason I switched to another drug.
So I don't carb load before or after exercising and I don't seem to have problems keeping my glucose levels from going too low when I work out. Maybe I'm lucky. As I said, your mileage may vary, and the only way to figure this stuff out is to try different things and see what happens. You might want to keep some glucose tabs close by those first few times you exercise just in case, but you may also be surprised to learn that you don't need to do anything special.  | 
