It's not all that different.
It doesn’t “burn” if it doesn’t have the muscle to do the burning.
You bet. If two people each eat 1800 calories and one burns 1600 calories while the other burns 2000, the first will gain while the second will lose weight.
Like I said, thermodynamics.
The problem with “calorie in/calorie out” is that young people think that all they have to do is stop eating and they lose weight
It's true, a lot of stupid people believe a lot of stupid things.
stop telling people that they can take a walk or do 30 minutes of aerobics three times a week and they miraculously lose weight.
Nothing miraculous, thermodynamics.
No oxygen, no fire.
Simple as that.