From: CurtAdams@aol.com
Date: Fri Nov 06 1998 - 10:44:40 MST
In a message dated 98-11-06 05:13:14 EST, maxm@maxmcorp.dk (Max M)
writes:
>I just wondere where exercise fits into this? If for example I do weight
> pushing and something like running. Then my rest pulse will be lower too
> right? Doesn't that too lower the overall metabolism?
No, exercise actually raises basal metabolism.
> As some of the posting Doug Screcky has made her about the Fat vs. Fittnes
> seem to imply that overall death rate seem much more dependant of fittnes
> than of weight. (I do understan that CR is not about weight but about
> changing the metabolism)
Unclear. Metabolic rates seem to recover with extended calorie restriction in
rodents; the animals just weigh less. The extreme life extension in C.
elegans
from nutritional restriction and now some genetic manipulation does seem to
involve metabolic changes.
> Is there any research about this?
Yes. Exercised rodents have roughly the same life expectancy regardless of
calorie intake. They have a slight benefit from CR, but only about 10% life
extension from 50% restriction. Non-exercised rodents get
tremendous benefits from CR. The most severely restricted rodents outlive
any exercised rodents by a substantial margin - 10 to 20%. Moderately
restricted rodents - 30% CR - live about as long as the "exercised norm".
Realistically, then, I don't think you should consider exercise as providing
the benefits of CR. The "exercised norm" is probably a normal healthy
life. The point of CR is to do better than that.
Nothing in the monkeys, as yet.
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