Heart RateExerciseExercise TestPhysical ExertionOxygen ConsumptionHeartPhysical EnduranceExercise TherapyExercise ToleranceAnaerobic ThresholdBicyclingMuscle, SkeletalPhysical FitnessLactic AcidRestPulmonary Gas ExchangeSweatingRunningBlood PressureEnergy MetabolismPhysical Conditioning, AnimalTime FactorsResistance TrainingHemodynamicsCardiovascular Physiological PhenomenaRegional Blood FlowAthletic PerformanceHeart FailurePhysical Education and TrainingLegSportsRespirationOxygenHeart Rate, FetalAnalysis of VarianceForearmLactatesGlycogenCardiac OutputSympathetic Nervous SystemAdaptation, PhysiologicalAutonomic Nervous SystemCarbohydrate MetabolismBody TemperatureSkin TemperatureWalkingHeart DiseasesEpinephrineMuscle ContractionFatty Acids, NonesterifiedHand StrengthHeart TransplantationBlood GlucoseCarbon DioxideHeart Defects, CongenitalCalorimetry, IndirectOxidation-ReductionGlycerolThighElectrocardiographyBody CompositionMotor ActivityReference ValuesRespiratory MechanicsCitrate (si)-SynthaseIsometric ContractionFetal HeartBaroreflexPulmonary VentilationAgingAdrenergic beta-AntagonistsAnoxiaMuscle Fibers, Fast-TwitchElectrocardiography, AmbulatoryBlood Flow VelocityRandom AllocationStroke VolumeLinear ModelsBody WeightKineticsMyocardiumMyocardial ContractionGlucoseHeart AtriaHeart Function TestsReproducibility of ResultsSex CharacteristicsDogsInsulinElectromyographyCoronary DiseaseVentricular Function, LeftHeart BlockRegression AnalysisPropranololLipid MetabolismTreatment OutcomeHeart ValvesHuman Growth HormoneProspective Studies