Re: [Paddlewise] Cold water adaptation - Part II

From: Michael Daly <michaeldaly_at_rogers.com>
Date: Wed, 19 Mar 2003 19:58:12 -0500
From: <FoldingBoats_at_aol.com>

> There's no biological wiggle room to modify the pure physics? Changed 
> response patterns with regard to surface blood circulation potentially?

There are.  The ability of a person to handle cold is dependent on fitness
level.  Those who are in shape can handle colder conditions than those 
who are out of shape, regardless of level of body fat.  This is due to 
the enhancement of the cardiovascular system and the way the body
learns to control blood flow to the skin and extremities when fit.

When I was a xc ski racer, I'd spend hours outside (not always really
active) in just lycra and polypro at temps of -10C (give or take 5C).  
I'd burn calories just staying warm (unlike today where I absorb
calories just looking at food!).  This is a fitness-related acclimatization.

Some of this stuff is documented, though I can't offer a source off the
top of my head.

So - conclusion: fitter paddlers will do better than unfit.  If you improve
your fitness level, you will improve your cold tolerance.

I'd offer anecdotal evidence that acclimatization to cold works - I spend a
lot of time outdoors and can handle cold better than many others - but 
that's not scientific.  Many others offer the same evidence - whether it's
a psychological or physical reaction I can't say.

Mike



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Received on Wed Mar 19 2003 - 16:56:05 PST

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