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Thread: Talkback: How To Survive The Extreme Cold

  1. #1
    Goon
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    so basically get fit, take cold baths and eat more?

  2. #2
    Goon jim turner's Avatar
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    "Olenyok, Siberia with the Evenki herders where temperatures reached as low as 50┬║C"



    I would have thought heat stroke is more likely....

  3. #3
    Super Moderator captain paranoia's Avatar
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    "But why the elevated need for calories?"

    An energy balance. You lose more energy from your body to a cold environment (for the reasons discussed), and that energy has to come from somewhere. Either we burn fat reserves and lose weight, or we need to eat more.

    Metabolic temperature regulation is rather cunning system, with two levels of feedback, involving the hypothalamus, the pituitary gland, the thyroid gland, and four hormones: thyroxine (T4),triiodothyronine (T3), thyrotropin-releasing hormone (TRH) and thyroid stimulating hormone (TSH).

    T4 and T3 hormones control the energy-releasing function of all cells in the body, controlling the base metabolic rate. If the hypothalamus detects that the body is too cold, it releases TRH, which causes the pituitary gland to release TSH, which causes the thyroid to release T4 (converted elsewhere to T3), and there's a feedback loop of T4 to control the pituitary gland production of TSH.

    All very cunning.

    http://en.wikipedia.org/wiki/Thyroid_hormone

    It all works rather like an adaptive central heating system, one in which the rate at which fuel is burnt can be varied (rather than a crude on/off control).

  4. #4
    ▄bermensch cathyjc's Avatar
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    Article posted in June ? -just in time for summer. I do hope I don't need this particular advice in the Scottish hills in the next few months

  5. #5
    Initiate
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    my chickens understand the science----they always eat more when its cold-------------------regards lr

  6. #6
    Goon
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    there is an academic category for this sort of research. It's called " the study of the bleedin' obvious"

  7. #7
    ▄bermensch
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    and woolly knickers.

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