RestBed RestPhysical ExertionExerciseExercise TestHeart RateOxygen ConsumptionMuscle, SkeletalHemodynamicsBlood PressureCoronary CirculationRegional Blood FlowCardiac OutputPulmonary Gas ExchangeDobutamineBlood Flow VelocityPhysical EnduranceHeartHyperemiaRespirationBicyclingTime FactorsStroke VolumeOxygenEchocardiography, StressLegMuscle ContractionLactic AcidVascular ResistancePhysical Conditioning, AnimalExercise ToleranceNitrogen RadioisotopesVentricular Function, LeftSympathetic Nervous SystemDipyridamoleCarbon DioxideTomography, Emission-Computed, Single-PhotonElectrocardiographyTomography, Emission-ComputedPain, PostoperativeEchocardiographyReference ValuesPostureValsalva ManeuverEpinephrineGated Blood-Pool ImagingBaroreflexHead-Down TiltEchocardiography, DopplerRespiratory MechanicsCoronary DiseaseVasodilator AgentsForearmDyspneaPulmonary CirculationAutonomic Nervous SystemEnergy MetabolismNorepinephrinePhosphocreatineVentricular Dysfunction, LeftMyocardial Perfusion ImagingRadionuclide VentriculographyAngina PectorisDouble-Blind MethodAnalysis of VarianceSupine PositionIsometric ContractionSystoleElectromyographyMyocardial IschemiaDiastoleAdenosinePulmonary VentilationAnalgesia, Patient-ControlledHeart FailureGlycogenMyocardial ContractionHeart VentriclesOrganotechnetium CompoundsPain MeasurementVasodilationRunningLower Body Negative PressureElectric StimulationCardiotonic AgentsReproducibility of ResultsWeight LiftingMagnetic Resonance ImagingBlood Gas AnalysisAnaerobic ThresholdMetoprololCross-Over StudiesPropranololCardiovascular Physiological PhenomenaCoronary AngiographyLactatesAdaptation, PhysiologicalAcetylcarnitineCardiovascular DeconditioningThallium Radioisotopes