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- From: sherwood@space.ualberta.ca (Sherwood Botsford)
- Subject: Re: Fit or Fat Facts?
- Message-ID: <1992Nov23.203914.18788@kakwa.ucs.ualberta.ca>
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- Organization: University Of Alberta, Edmonton Canada
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- References: <BETSYS.92Nov23005050@ra.cs.umb.edu>
- Date: Mon, 23 Nov 1992 20:39:14 GMT
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- Elizabeth Schwartz (betsys@cs.umb.edu) wrote:
- : Since so many people here keep mentionning it, I picked up a copy of
- : "The New Fit or Fat" by Covert Bailey. Ok, I believe that exercise is
- : necessary to lose weight, but how substantiated is the assertion here
- : that fit people burn more calories than fat people, even when idle?
- : It seems to me that from a survival standpoint, back when we were
- : all evolving, the "fittest" person would be the person who was able to
- : store energy, not the person who burnt up all their fuel without
- : storing it. Or do we have two "modes," a "store fat for winter" mode
- : and a "burn fat like crazy it's summer" mode?
- : This book doesn't have ANY footnotes (bad sign for a science book.)
- : Is there any research to support these claims?
- :
-
- Until quite recently being plump was considered a sign of health, and beauty.
- (Look at Ruben's nudes...) You can speculate about this a lot: Poor people
- didn't eat as well. Thin people were undernourished, and more suceptable to
- TB, flu and sundry other pestulences.
-
- In a society where food is irregular, being able to store excess is an
- advantage. There is a certain amount of variability in this, hence in
- time of famine, the fat storers have an advantage, while in times of plenty
- fat storers may well die from heart disease.
-
- You can see there will be ramifications to this: HD tends to affect 40+
- year olds, an age that through most of human history is after reproduction.
- I suspect that there is a survival advantage for a group to have a mix.
-
- Certainly the amount of energy that a kilo of muscle uses while sitting
- doing nothing is greater than that for a kilo of fat. The fat also is often
- layered at the surface, and with a smaller blood supply can act as an in-
- sulating layer. I'm about 15 lbs lighter now than a year ago, and I feel
- the cold much more intensely. This should increase the amount of calories
- used for basic heating.
-
- We do have a burn fat like crazy mode. I spent two weeks on a dog-sled
- expedition where the warmest it got was -30. (On New Years eve, the rum had
- frozen solid by 9 p.m.) Breakfast included 1/2 lb of bacon/day. The excess
- grease was soaked up with bannock (trail biscuits) Despite this and about
- 4000 additional calories, we all lost 4-8 pounds on the trip. Exercise was
- significant, but not overwhelming, but the stress from the unrelenting cold
- was astounding.
- --
- => Sherwood Botsford sherwood@space.ualberta.ca <=
- => University of Alberta Lab Manager, Space Physics Group <=
- => tel:403 492-3713 fax: 403 492-4256 <=
-