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COD or Chemical Oxygen Demand definition. Chemical oxygen demand (COD) is a measure of the capacity of water to consume oxygen during the decomposition of organic matter and the oxidation of inorganic chemicals such as Ammonia and nitrite.
Maximal Oxygen Uptake. VO2 Max is defined as the highest rate of oxygen consumption attainable during maximal or exhaustive exercise. The terms VO2max, aerobic power, aerobic capacity, and maximal oxygen uptake are all terms used interchangeably. VO2max is widely accepted as the standard gauge of cardiorespiratory fitness.