Hard exercise can raise your body temperature as much as four or five degrees.
Did you know that many small animals that stay in cold environments during the winter go into a brief daily hibernation-like state? Scientists call it torpor. Torpor allows the animals to lower their body temperatures greatly, and their breathing and heart rate are so slow you can barely tell they’re alive. Learn more on this Moment of Science.
Turn up the heat in the body, and many body processes speed up, including the production of white blood cells and how fast they find infectious bacteria and viruses.