Take your temperature every three minutes for 15 minutes. Record these temperatures in your notebook. Use the graph paper to construct a line graph of your body temperature after exercise. Blood vessels in the skin constrict to allow improved blood flow to the muscles. After activity the blood may not return to the outer skin vessels quickly.
Humans sweat to get rid of excess body heat.
As soon as water reaches the surface of skin, it starts to evaporate. Evaporation of water requires a great deal of heat and this heat is supplied by the body. The skin will likely be cooler than normal because of the evaporation of sweat. The cooling effects of water can be replicated by placing a small amount of rubbing alcohol on the skin. The alcohol evaporates very quickly and there is a noticeable cooling effect on the skin.