One particularly nasty day on Usenet, "No" said:
>What is this increased metabolism about anyway? I figure some of it is it
>energy used for muscle repair. Maybe one component is an evolved state
>designed to keep the energy level up for quick fight or flight. There are
>probably hundreds of dissertation studies quantifying exactly how much extra
>energy is burned after working out. Details, anyone?
You just had to go and open this can of worms again, didn't you? ;?)~
Well it's probably a combination of the things you mention, and a lot of other
things too. Yes there are studys galore on either side of the fence. Personally
I only know that without a minimum of an hour a day of running, I'd be the star
troll on "Rec.fatpeopleover300lbs" instead of here.