Anaerobic ThresholdExercise TestOxygen ConsumptionExerciseExercise TolerancePulmonary Gas ExchangePhysical EnduranceLactic AcidPhysical ExertionHeart RateErgometryCarbon DioxideOxygenExercise TherapyBicyclingPhysical FitnessRespirationPulmonary VentilationMuscle, SkeletalRespiratory Function TestsMaximal Voluntary VentilationPhysical Education and TrainingLactatesRunningMuscle FatigueCardiac OutputTorsion, MechanicalHeart FailureTime FactorsSportsAnalysis of VarianceSpectroscopy, Near-InfraredElectrocardiographySensory ThresholdsRestDyspneaStroke VolumeWalkingRespiratory MechanicsBlood Gas AnalysisAltitudeAcid-Base EquilibriumAsthma, Exercise-InducedHemodynamicsLegBlood PressurePhosphocreatinePredictive Value of TestsOxyhemoglobinsAdaptation, PhysiologicalAnoxiaReference ValuesTreatment OutcomeChronic DiseaseAngina PectorisRegional Blood FlowPulmonary Disease, Chronic ObstructiveProspective StudiesDifferential ThresholdBlood VolumeHemoglobinsReproducibility of ResultsAuditory ThresholdCase-Control StudiesPain ThresholdCoronary DiseaseCardiovascular Physiological PhenomenaBreathing ExercisesForced Expiratory VolumeHydrogen-Ion Concentration