RT Journal Article T1 Disadvantages of Automated Respiratory Gas Exchange Analyzers A1 Lorenzo-Capellá, Irma A1 Calderón-Montero, Francisco Javier A1 Ramos Álvarez, Juan José AB The use of automated gas exchange analysis systems in exercise studies is common throughout the industrialized world and are frequently used in sports medicine laboratories for the measurement of maximal oxygen uptake (VO2max), as an integrative parameter that allows the physical condition to be assessed, in spite of its limitations.Actually, the fundamental principles behind the measurement of respiratory gas exchange (RGE) have not changed for a century. It was used a manual Douglas bag method together with separate chemical analyses. The need for faster and more efficient techniques, has conditioned the traditional procedures and determined the emergence of automated systems. However, the validity and reliability of all these different systems is not well known. The common features associates with thesesystems, also have disadvantages that must be evaluated at the time of the acquisition of an automated equipment: (1) regular quality control checks, which entails other added economic costs, (2) the validity and reliability of the results, which it is necessary to verify, and (3) the user does not know the equations that determine the values of oxygen consumption and carbon dioxide production. This work aims to clarify the disadvantages of these automated systems. At maximum intensities, the variation of VO2max or VO2peak can be very significant in athletes and even more relevant in sick people undergoing a training program. Therefore, considerable care is needed whencomparing RGE data with automated systems. PB Frontiers YR 2020 FD 2020-02-07 LK https://hdl.handle.net/20.500.14352/117953 UL https://hdl.handle.net/20.500.14352/117953 LA eng NO Ramos-Álvarez JJ, Lorenzo-Capellá I and Calderón-Montero FJ (2020) Disadvantages of Automated Respiratory Gas Exchange Analyzers. Front. Physiol. 11:19. doi: 10.3389/fphys.2020.00019 DS Docta Complutense RD 6 abr 2025