Originally Posted by
Machka
But you've really got to do 4000 kcal worth of exercise, and from what I've seen Garmin and many other calorie counters give you a "feel good" number. In reality, 4000 kcal worth of exercise would be 8+ hours of cycling, or for me, an imperial century or longer.
On the counters, at least for the garmin, if you hunt the web they give you the formula so that you can 'reverse-engineer' a correct VO2max /HR proxy based calorie count by keying in fake numbers for height and weight. Mine's actually pretty close, about 10% off as is; but I ride a very heavy, parachute laden bike and am pretty heavy for my height to begin with. As I can't count food calories with 10% accuracy, I just use the numbers and call it gudnuff.
But if a person started riding an imperial century or longer every couple weeks, plus regular and frequent rides of 2 hours or more in between, that person could eat pretty much whatever they wanted.
They guy said 75 miles, even with a thinner cyclist body on a good road bike, you should burn up a 3000kcal or so; quite a bit more than the Combo#13, chocolate milk, unsweetened tea, and a Flan for desert (~2000 kcal)