"jtaylor" <[email hidden]> a écrit dans le message de
news: [email hidden]!nnrp1.uunet.ca...
Quoted message said:Ignoring psychological considerations, the sensation of temperature will
depend on the rate of heat loss (or gain) from the body to the water.
I don't agree.
If I swim fast and do a lot of efforts, my body temperature will rise, and
the heat loss will largely increase (because of the increased water - body
temperature difference, and because of the increased flow of water along the
skin).
But I will feel much warmer, because my body temperature is higher. The
water which was cold when I swam slowly will become "refreshing", and I will
appreciate to be able to dissipate all this excessive body heat. The
sensation of temperature will become "nice" instead of "cold", even though
the heat loss rate will increase.
The same goes if I run before swimming: I can swim in a much colder water
with pleasure if I was sweating before. Because the body needs to be
refreshed to come back to 37°C.
-- Olivier