OxygenOxygen ConsumptionReactive Oxygen SpeciesOxygen Inhalation TherapySinglet OxygenOxygen IsotopesHyperbaric OxygenationPartial PressureAnoxiaHydrogen PeroxideOxidation-ReductionOxidative StressOximetryAntioxidantsOxyhemoglobinsCarbon DioxideAerobiosisSuperoxide DismutaseHemoglobinsFree RadicalsFree Radical ScavengersMitochondriaCatalaseHyperoxiaNADPH OxidaseCell HypoxiaAnaerobiosisSuperoxidesBlood Gas AnalysisPolarographyTime FactorsLuminescent MeasurementsKineticsPulmonary Gas ExchangeEnergy MetabolismBlood SubstitutesRespirationBlood Gas Monitoring, TranscutaneousOxidantsCells, CulturedOxygen RadioisotopesXanthine OxidaseNitric OxideReactive Nitrogen SpeciesAcetylcysteineGlutathioneHydrogen-Ion ConcentrationModels, BiologicalExercise TestHemodynamicsElectron TransportApoptosisElectron Spin Resonance SpectroscopyHypoxia-Inducible Factor 1, alpha SubunitDiphosphoglyceric AcidsHydroxyl RadicalSignal TransductionGlucoseLactic AcidHeart RateLipid PeroxidationElectron Transport Complex IVIon-Selective ElectrodesRats, Sprague-DawleyCerebrovascular CirculationPhysical ExertionOxidoreductasesCarbon MonoxideCell SurvivalMembrane Potential, MitochondrialCyclic N-OxidesAirSpectroscopy, Near-InfraredMyoglobinCardiac OutputHeliumExerciseDose-Response Relationship, DrugSpectrophotometryMyocardiumAltitudeRegional Blood FlowOnium CompoundsHypoxia-Inducible Factor 1LactatesHemeLungMetalloporphyrinsNitrous OxideIronBlood PressureAscorbic AcidExercise ToleranceCell DeathMuscle, SkeletalWaterBrainAdaptation, PhysiologicalLightAdenosine Triphosphate