Heat Balance in a Hot Environment.
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Sam Dainty - Sports Science and Physiology 012-003-266 Heat Balance in a Hot Environment Practical Write-up Group 1- Monday a.m Heat Balance in a Hot Environment Introduction Changes in metabolic requirements of the human body are reflected by changes in ventilation rate accompanied by corresponding changes in oxygen consumption and carbon dioxide production. Using a Douglas bag, expired air can be collected over a set period of time so that the rate of ventilation can be calculated, and, after analysis of the expired air with the composition of inspired air, oxygen consumption and carbon dioxide production can be calculated. This method is technically called open circuit indirect calorimetry. It has been used in many studies of metabolism covering a wide range of physical activities, but now due to modern technology, sensitive gas analysers that are very rapid in response are used to calculate ventilation. The "integrative centre" in the hypothalamus compares the body core temperature to the...

