Why does skin temperature increase as the intensity of exercise also increases?
Because in order to carry on all of that intense exercise, your body is burning a lot
of fuel. Part of that metabolism becomes useful mechanical energy, the rest becomes
heat, and all of that heat has to be dissipated somehow so that your internal organs
don't become pot roast. Blood carries the heat to the surface, where it dissipates into
the air. If even more heat has to be shed, then sweat begins, in order to take advantage
of the heat lost during evaporation.
As the temperature increases: The solubility of a solid in a liquid increases The solubility of a liquid in a liquid increases The solubility of a gas in a liquid decreases (The solubility of liquids and solids increase as temperature increases, while the solubility of gases decreases as temperature increases.)