A Short Note On Maximal Oxygen Consumption ( Vo2max )

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Introduction Maximal oxygen consumption (VO2max), the highest recorded rate of oxygen consumption during a graded and exhaustive exercise test, is a top indicator of cardio-pulmonary endurance in humans and is believed to correlate with overall health (Strijk, Proper, Klaver, Beek, & Mechelen, 2010). VO2max of an individual declines with age regardless of exercise status, but exercise may lead to a significantly slower decline in VO2max during the aging process (Katzel, Sorkin, & Fleg, 2001) Many factors related to aging such as decrease of maximal heart rate, stroke volume, the gain of body mass, decreased muscle mass, and decreased health status are thought to be the primary contributing factors leading to a decline in VO2max (Grimsmo, Arnesen, & Maehlum, 2010). Individuals that have decreased their physical activity levels or developed health problems had a greater decline in VO2max values, over a longitudinal study, than their healthy counterparts (Grimsmo et al., 2010). Chronic obstructive pulmonary disease (COPD) affects individuals by causing airflow restriction, impairing their exercise capacity (Ortega, Montemayor, Sanchez, & Cabello, 1995). A VO2max test has the ability to help identify COPD that may not have been apparent prior to this test and can indicate the severity of the disease (Ortega et al, 1995). One metabolic equivalent of task (MET) is the amount of energy used to sit in a chair for one minute which is equivalent to a VO2max value of 3.5ml/kg/min

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