Physiological and physical parameters
nose and mouth
LUNG, APS
Lung volume associated parameters (e.g. forced vital capacity (FVC), forced expiratory volume in one second (FEVBlood gas analysis (BGA) from hyperaemic capillary earlobe blood was taken before and after CPET and ergometry and at the end of each load level (5th minute) as well as before and at the end (while wearing a mask) of the 4-h workplace examination (ABL 825 analyser, Radiometer Medical APS, Copenhagen, Denmark) to check sODuring CPET, cardiopulmonary parameters such as minute ventilation (VE), respiratory rate (RR), heart rate (HR), oxygen uptake (VOFor ergometry and workplace examination, the heart rate (HR) and respiratory rate (RR) were measured simultaneously using a portable, wireless polysomnography system (SOMNOscreen® Plus PSG, SOMNOmedics GmbH, Randersacker, Germany).According to current recommendations, changes in inspiratory and expiratory COTemperature and humidity were recorded using a climate data logger (PeakTech 5185®, Ahrensburg, Germany), which was fixed with adhesive tape between nose and mouth