Uncle Peter wrote
Rod Speed wrote
Bod wrote

Uncle Peter made this incredible statement:

"This is a fact. -20C air does not make you cold, .
You might shiver if you were naked, but the
shivering will stop you getting any colder".

To me, it sounds like he's talking absolute bull****
and he should be sent to the funny farm, but is
there an element of truth in what he said?....

Nope. Its certainly possible to be quite active when
naked in -20C air and do fine, but just standing there
naked and shivering wont let you survive for long.

Active or not it doesn't matter.

Bull****. Try going for a walk when its -20C and see the
difference it makes, or chopping up some firewood etc.

Shivering replaces active, it's the same thing,

Bull****.

your muscles are moving.

Much less when shivering instead of chopping firewood etc.

You also have reduced blood flow to the surface (all of you,
not just your fingers and toes and other sticky out things),
and brown fat cells which generate heat directly from calories.

And if you are actually stupid enough to be stark naked in a gale
at -20C and just stand there, you will be dead quite quickly.