Exercise ToleranceFatigueExercise TestExercise TherapyMuscle FatigueExercisePhysical ExertionFatigue Syndrome, ChronicDrug ToleranceOxygen ConsumptionMental FatiguePhysical EnduranceDyspneaImmune ToleranceBreathing ExercisesMuscle, SkeletalHeart RatePulmonary Disease, Chronic ObstructiveLung Diseases, ObstructiveHeart FailureRespiratory Function TestsQuality of LifePulmonary Gas ExchangeTime FactorsXamoterolDouble-Blind MethodAngina PectorisGlucose Tolerance TestRespiratory MusclesAnaerobic ThresholdCross-Over StudiesTreatment OutcomeForced Expiratory VolumeMuscle StrengthChronic DiseaseWalkingRestCounterpulsationHemodynamicsBlood PressureRespirationCardiac OutputInspiratory CapacityLactic AcidHeart Function TestsVital CapacityStroke VolumeAdaptation, PhysiologicalTransplantation ToleranceOxygenAnalysis of VarianceNeurocirculatory AstheniaSeverity of Illness IndexLegSpirometryElectrocardiographyProspective StudiesIsosorbide DinitrateOxygen Inhalation TherapyPulmonary VentilationBicyclingFollow-Up StudiesEbstein AnomalyPropanolaminesMetoprololPhysical FitnessLungQuestionnairesSingle-Blind MethodGlycogen Storage Disease Type VPhysical Conditioning, AnimalBronchitisAdrenergic beta-AntagonistsVentricular Function, LeftEchocardiographyRunningEnergy MetabolismCardiac Output, LowMuscle ContractionVentricular Dysfunction, LeftDiastoleBronchodilator AgentsRegional Blood FlowAdministration, OralBlood GlucoseResistance TrainingHypertension, PulmonaryHeartNitroglycerinMuscle Stretching ExercisesRespiratory MechanicsIpratropiumArmBisoprololHand StrengthCoronary DiseaseClinical Trials as TopicNafronylIsometric ContractionEchocardiography, Doppler