Quote:
Originally Posted by opendoor
BMR is pretty consistent among people of similar age and size. In other words, fast and slow metabolism is a bit of a myth and plays a relatively minor role in a person's weight.
If you (not directed at anyone in particular) think your friend is eating massively more food than you and not gaining weight while you do, one of several things is happening:
-you're overestimating how much food your friend eats or underestimating how much exercise he gets.
-you're underestimating how many calories you take in yourself (people often ignore how many calories are in drinks) or overestimating how many you burn.
-you or your friend have a medical condition that affects weight.
Genetics play a role, but more on how your body deals with fat. When it comes to actual weight, it really just comes down to calories in - calories out. Obviously there's some variation among people, but the vast majority of the population is quite close to the average BMR given their age and size. Eating and lifestyle habits play a much, much bigger role in a person's weight than genetics or metabolism.
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I absolutely disagree.
I think a point could be made on what kind of food you eat, but I've seen with my own eyes people who eat as much food, if not more than I eat, and not gain weight, while I would gain weight.