[donaldc]

I think it could be more than that. Studies have found that some people have burned off an increase of hundreds of calories a day just through an increase in fidgeting.

And then there's this (http://www.medicinenet.com/script/main/art.asp?articlekey=99...)

Despite the fact that all of the subjects spent the same amount of time in exactly the same confined space, the results showed large differences in the number of calories they burned. Some subjects burned as few as 1,300 calories in 24 hours, while others burned as much as 3,600 calories, a difference of 2,300 calories in one 24-hour period!

Keep in mind that most of what these subjects were doing would not be counted as "exercise".

[jaggederest]

You were talking about thermogenesis, now you're talking about different activity levels. Not the same thing at all, really.

[donaldc]

You seem to be talking about some sort of very narrow non-motion definition of thermogenesis and I am not. I guess according to you, shivering because one is cold is not thermogenesis.

If you want to know more about what I'm talking about with drastic changes in calorie expenditure, do a google search on "non-exercise activity thermogenesis".