Exercising in Heat
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JumpUSA.com Topic #469 Lower Caloric Expenditure During Exercise in Heat During exercise the body needs energy to contract muscles, breathe, pump blood, send nerve impulses, break down and store energy and control body temperature. The source for almost all reactions is a chemical called adenosine triphosphate (ATP). The body has enough ATP to last about three to five seconds. In must be constantly replenished from energy released by the break down of creatine phosphate, carbohydrates, fats and proteins. Metabolism is a very imperfect energy process involving releasing energy to do cell work on one hand and capturing energy release from the break down of foods on the other. During this process, most energy is lost in the form of heat. Japanese researchers found that the energy cost of submaximal exercise was less when performed in a hot environment. They speculated that the heat buildup during exercise reduced thermogenesis (chemical heat generation), which improved the efficiency of exercise. Your body may exercise this mechanism to allow prolonged exercise in hot environments. (European Journal Sports Science, 5: 153-158, 2005), from FitnessRx Aug 2006 |