The cardiorespiratory parameters measured during exercisewere VO2, carbon dioxide production (VCO2), the RER, minuteventilation (VE), VT, the respiratory rate (RR), ventilatoryequivalents for O2 (VE/VO2) and CO2 (VE/VCO2), end-tidalpartial pressures of O2 (PetO2) and CO2 (PetCO2), and oxygenpulse (O2 pulse).