Originally Posted by
UMassAm
OK, so if I'm understanding, you burned about 3800 calories in 4 hours. per hour, thats 950 calories. i guess depending on intensity, if 60% is coming from glycogen stores, 570 calories of glycogen stores per hour are being burned. replenishing 300 calories/hr is putting you at a 270 calorie/hr deficit. i've heard average glycogen stores = ~2000. at this point we're so hypothetical, meaning has probably been lost, but within about 7.4 hours, you'd be depleted of glycogen. doing all that with the non-gps calorie counter makes a lot more sense, and gives a realistic picture. I'm just trying to figure out why everyone recommends 250-300/hr, and figure out what I actually need to consume during long rides lasting as long as 8 hours.
You need to eat as much as you can. Try it and you'll figure it out over a few rides. Maybe. The most important thing is to find a food or foods that you can whack down at that rate and keep down. The best cycling food is the one you don't barf up. It's that simple.