摘要:Oxygen uptake (VO2) and carbon dioxide production (VCO2) are commonly measured under laboratory conditions by using automated metabolic gas analysis systems (Macfarlane, 2001). Nowadays, gas exchange measurements take place more often under functional conditions e.g. in sports medicine (Smekal et al., 2003); and in assessing physiologic limitations during the performance of activities of daily life or during different exercise training modalities in patients with chronic organ failure (Sillen et al., 2008; 2011; Spruit et al., 2011; Vaes et al., 2011a; 2011b). So, there is a great need to accurately measure metabolic requirements under different 'dynamic' non-laboratory conditions. The objective of this study was to compare the Oxycon Pro with two Oxycon Mobile devices on gas exchange responses in healthy subjects during constant work rate cycle ergometry. Furthermore we aimed to investigate the agreement between two oxycon mobile metabolic systems.