So I've been reading up on this and I've gotten various answers. One study indicated it was approx 50 calories per pound a day, but this study turned out to be wrong...in a way. It didn't isolate factors like body type (endomorph, ectomorph, mesomorph) or activity level.
Another study said it was 5-6 calories per pound a day, but I believe this might have been for basal metabolic rate only and doesn't take into account activity level. So for a very sedentary person with a desk job, this would be true.
From my reading, I was sort of under the impression that if you gain a certain amount of muscle in an area, lets say a pound of muscle in your legs, and you were walking around all day as part of your job, thus using your leg muscles (extra pound of muscle contracting all day), wouldn't you be burning much more than an extra 5-6 calories per day??? So before you gained that pound of leg muscle, you burned 2000 calories a day, then you gained that pound of muscle, would you now burn something like 2030-2050 calories? Or would this apply only to anaerobic exercise (like lifting), not aerobic activities?
It also seems that athletes burn A LOT of calories when they exercise. Isn't this because of all the muscle they have? BUT, I've read that the better shape you are in, the less calories you burn doing the same exercise? These facts don't jibe, it's confusing.
So how many calories does a pound of muscle REALLY burn? And what factors do you take into account to determine this?