Besides staying active, the most important thing is to be wearing the appropriate exposure protection. This can mean a thicker wet suit, boots, gloves, and hood. For really cold environments, you must learn how to use a dry suit. Check with your local dive shop or instructor for the recommended protection for your area.
Last weekend here in Southern California, I wore a 7mm suit, along with a pair of gloves, a hood, and boots. I was fine at the surface, but at 35 feet, I could feel a little chill in my hands.
To keep their muscles warm.
To keep the swimmers warm. The large pool is cold
Yes.
i dont know ask yourself
To keep warm, as sometimes they can be in the water for a few hours at a time and might be stationary at times.
You could turn on the heater or cover yourself with a blanket.
in warm weather and you can sellthe fur or keep it for yourself
Hiking, Diving, Sex. In reverse order. Clean living, modest eating, and excercise regularly.
Inside... the fur traps warm air close to the body.
Keeping your hands warm, and preventing abrasions.
Wash your hands often. Keep warm. Avoid people who are sick at the moment.
They can be to keep yourself warm (for example a air conditioner) or to see in dark (for example a lamp)