why does your body temperature increase when you exercise

Temperature During Exercise You sweat more after you finish exercising than you do while you exercise. More than 70 percent of the energy that powers your muscles is lost as heat, causing your body temperature to rise during exercise. To keep your body temperature from rising too high, your heart pumps the heat in your blood from your muscles to your skin, you sweat and it evaporates to cools your body. Sweating is controlled by the temperature of the blood flowing to the part of the brain called the hypothalamus. When your temperature rises, you sweat more.

During exercise, your heart beats very rapidly to pump blood to bring oxygen to your muscles and hot blood from the muscles to the skin where the heat can be dissipated. When you stop exercising, your heart immediately slows down, decreasing the amount of blood pumped to your skin, so your temperature rises higher and you sweat more.
The human body is designed to function most efficiently at a constant core temperature of 37jC. Body temperature can increase as a result of being in a warm environment or as a result of exercise.

During exercise, respiration Chemical change that takes place inside living cells, which uses glucose and oxygen to produce the energy organisms need to live. Carbon dioxide is a by-product of respiration. releases energy in the muscles. When the body temperature is too high, the skin produces sweat, which evaporates from the surface of the skin. As it evaporate The process in which a liquid turns into a gas. , it takes heat energy from the body. If the body sweats a lot, such as during strenuous exercise on a hot day, the body can lose a lot of water and become dehydrated.

The body may then have insufficient water to make sweat, so the bodys core temperature may continue to rise. This can be very dangerous. Click here for a BBC News report about a competitor in the 2010 who died during the event. At low body temperatures, the body starts to shiver. Shivering is when muscles contract and relax rapidly. Doing this releases energy through increased rates of respiration in muscle cells, which warms the surrounding blood and other tissues. Read on if you're taking the higher paper.

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