CARDIOPULMONARY EXERCISE TESTING FOR VO2MAX DETERMINING IN SUBJECTS OF DIFFERENT PHYSICAL ACTIVITY
Keywords:
cardiopulmonary exercise testing, VO2max, bicycle ergometer, regression equations, measuring systemAbstract
Cardiopulmonary exercise testing (CPET) provides assessment of the integrative exercise responses involving the pulmonary, cardiovascular, haematopoietic, neuropsychological, and skeletal muscle systems, which are not adequately reflected through the measurement of individual organ system function. This non-invasive, dynamic physiological overview permits the evaluation of both submaximal and peak exercise responses, providing the doctor with relevant information for clinical decision making. CPET is increasingly being used in a wide spectrum of clinical applications for the evaluation of undiagnosed exercise intolerance and for the objective determination of functional capacity and impairment. Its use in patient management is increasing with the understanding that resting pulmonary and cardiac function testing cannot reliably predict exercise performance and functional capacity and that overall health status correlates better with exercise tolerance than with resting measurements. CPET involves measurements of respiratory oxygen uptake, carbon dioxide expenditure and pulmonary ventilation during a step-vice increased physical workload up to the maximum (or symptom-limited level in patients) on ergometer. In this paper the principle of CPET is described and results for VO2max and VO2max/kg of almost 3000 measurements in subjects of different physical activity are presented. These values characterizing cardiorespiratory capacity of the subjects were compared to the values of maximal performance achieved during stress test on bicycle ergometer (Wmax and Wmax/kg) and regression equations for VO2max – Wmax and VO2max/kg – Wmax/kg were calculated.
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