Validation of a computerized metabolic measurement system (Oxycon-Pro (R))during low and high intensity exercise

The aim of the study was to validate a new, fast metabolic measurement syst em (the Oxycon-Pro (R)) during low and high exercise intensities against th e Douglas bag method. For this purpose twelve highly trained subjects perfo rmed an incremental cycle ergometer test. In the third minute of each exerc ise step simultaneous measurements of the Douglas bag and the Oxycon-Pro (R ) were performed. No significant differences between the Oxycon-Pro (R) and the Douglas bag measurements for minute ventilation (V-E), oxygen uptake ( VO2) and carbon dioxide expiration (VCO2) were found. Bland and Altman anal ysis of validity demonstrated minimal bias and low standard deviations. In conclusion, the results show that the Oxycon-Pro (R) is a valid apparatus f or determination of minute ventilation (V-2), oxygen uptake (VO2) and carbo n dioxide expiration (VCO2) during low as well as during maximal exercise i ntensities. Unlike with the Douglas bag method, this fast metabolic measure ment system can be used for accurate and quick determination of ventilatory variables during exercise.