Calories as a whole are an inaccurate form of measurement anyway. If you think you know, for a fact, how many calories you're taking in in any given day, you're wrong.
Take my favorite microwave burritos (before diagnosis at least). They were 360 calories -- but that's only an average. If the ratio of beans/rice is different, the calories are different. Was the cheese densely or loosely packed? All of that makes a big difference.
I have a Forerunner for my exercising, and the calorie burn is considered low. After a walk on the treadmill, it'll say i burned 112, but the treadmill will say 178. OTOH, it says I burn around 950 cals/hour rollerblading, which seems ridiculous, since I can blade for several hours at a time.
Point being, it's all an estimate. ANYTHING having to do with the body is an estimate, you know? The human body is art, not science
