November 8th, 2009

At work, Self portrait

Exercise, fat, etc

Phys Ed: Why Doesn’t Exercise Lead to Weight Loss? (NY Times)

Most of us actually burn off a lot of the calories we eat, rather than storing them. This is particularly true for carbs, as we don't have a good system for storing carbs over and above approximately one day's use (which is stored as glycogen). Converting sugars to fat is cumbersome and most of the energy is lost in the process. (There is a difference between sugars though, as fructose is a bit easier to convert to fat. Or so I read, back when I tried to get my weight back.) Anyway, even if we don't exercise, we leak away many of the extra calories as heat. If we exercise, the body simply processes less calories during the rest of the day, as also this study shows. Negative afterburn.

Still, it is better to be fat and healthy than fat and unhealthy!
At work, Self portrait

That's why we have a separate WIS stat, folks

"A high IQ is like height in a basketball player," says David Perkins, who studies thinking and reasoning skills at Harvard Graduate School of Education in Cambridge, Massachusetts. "It is very important, all other things being equal. But all other things aren't equal. There's a lot more to being a good basketball player than being tall, and there's a lot more to being a good thinker than having a high IQ."
New Scientist, Clever fools: Why a high IQ doesn't mean you're smart