Barbosa BT, et al. – This paper encompassed an exploration of the cardiorespiratory responses to the cardiopulmonary exercise test (CPET) among hypertensive elderly with obstructive sleep apnea (OSA). The findings revealed that OSA did not exert any impact on the CPET variables in hypertensive elderly, but it attenuated the heart rate recovery in the second minute (HRR₂). The link between oxygen saturation (O₂S) during sleep with ventilatory responses possibly occurred, as a result, of the adaptations in the oxygen transport system unleashed via mechanical respiratory feedback. OSA was found to compromise the oxygen supply in hypertensive elderly.