Razmere v gorah

RSS podatki
Vseh zadnjih 20 prispevkov
Iskanje po bazi podatkov

Prispevki zadnjega meseca: (31)

Note 44.224 MOUNT-L 224 of 517 CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 60 lines 11-NOV-1993 07:47
CUPIDO::STRITAR "Andrej Stritar,IJS,(61)-371-321" 60 lines 11-NOV-1993 07:47
--------------------------------------------------------------------------------
Subj: Re: Sleeping at 4800 m

Dave Tanner at Indiana University, and also on this reading list
probably has alot to say about this topic. It has been a research focus
here for several years. To summerize, I think Dave would agree that
most of the weight lost is due to a decline in fat mass. This
appears to be due to an energy imbalance, ie expending more
than you consume. Estimates from our lab (below or at 14K)
suggest that expenditure can easily exceed 5K cal per day.
Most climbers pack and eat around 3K cal day. If you
are dedicated enough to eat enough weight loss does not
apparently have to occur. But of course expenditure varies
widely. Snow days/rest days dont "cost" much. There is
a possible decline in muscle mass that appears specific
or regional. Is this due to detraining? Could be. Other
than this data not much exists, particularly above 14K.
The best known data comes from the Operation EverestII
research project at simulated altitude to 29K. Lots of stuff
including a complete compiled version of all papers is available.
See Houston, West, Sutton, Schoene as key names in a database
search.

On Thu, 4 Nov 1993, Mountaineering Discussion List MOUNT-L wrote:

> Date: Thu, 4 Nov 93 13:05:43 CDT
> From: Mountaineering Discussion List MOUNT-L
> To: stagerj@ezmail.ucs.indiana.edu
> Subject: Re: Sleeping at 4800 m
>
> The aspect of living at altitude which I can contribute is the problem of
weight
> loss at altitude. While the cause of weight loss at altitude is unknown
to
> the
> field of sports nutrition, the phenomenon is well documented and considered an
> adversity. I say this because not too many mountaineers have an excess of
body
> fat, therefore ( and this is well documented too) the weight loss is generally
> due to a loss of muscle mass. I would also add that it is not entirely
> understood why those people who live on the Tibetan Plateau have not vanished
> completely by the same mechanism. So it is possible to maintain weight at
> altitude. In fact, a researcher by the name of Gail Butterfield studied
> a group of individuals at the top of Pikes Peak (5,500 m) and found that it
> was possible to maintain body weight by feeding them more than they wanted
> to eat, based upon appetite. Furthermore, she found that carbohydrates were
> the best fuel source for maintaining weight.
>
> Here are some basic recomendations:
> - force yourself to eat
> - take foods that are easily consumed - high energy, powders
> - always add carbohydrate powder drink mix to your water, don't drink water
> alone
>
> I'm interested to hear other comments regarding living at altitude.
> Hope this is of some help.
> Eric McClelland EMCCLEL1@ITHACA.EDU

***pico
18.117.107.90(0)
1184883 (664700,196,519987)
1145720 (643241,66,502413)
razmere.e-gora.si