Quote:
Using a data point of exactly 1 (me) I had done none of those things you mentioned and it was way off for me too. As you mention - it is based on a formula which may or may not be accurate for an individual. In my case I simply don't burn as many calories as a person my size and weight should.
Add another data point to your study. The weight loss that got me to goal was really my first significant weight loss effort, so I've never been a yo-yo-er, and yet still, those things are LAUGHABLY off for me. Laughably. I wore a heart rate monitor for 3 months straight, tracking my calories in vs. out. I ate an average of 1750 calories a day, and my HRM said I burned an average of 3450 or so. I gained 2 lbs in those 3 months. My body is just SUPER EFFICIENT with its calories.
That said, it was super-helpful in getting me to exercise even more, walk around more, etc. Seeing the numbers go up, even if those numbers were hypothetical and not my reality, was pretty fun, and enough of a motivator to move that it helped solidify my exercise habits.