change in core temperature...
I thought I would measure the change in core temperature during diving today, out of interest....
Before diving it was 37oC and after 1hr10min in 8oC it had dropped to 33oC. (Measured under the tongue, so not ideal, but probably accurate to within a degree). I don't know what temperature would be defined as hypothermic. Perhaps hypothermia is diagnosed according to symptoms rather than temperature? That would make more sense. When I came out, my feet and hands were very cold, but my body was ok, cold but not shivering. For me, the signs of becoming too cold are feeling tired and yawning a lot - but I didn't experience that today. There must be an element of adaption with this - mental and physical?
(To put it into context: I was wearing a full 7mm and 3mm socks and gloves, and did 5 x 30m dives spaced out during the 70mins - fairly low activity level. I have little in the way of 'natural insulation'(!), probably under 10%. Shall be wearing 5mm gloves next time, as I was losing dexterity after 45mins today).
alun