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ExerciseExercise TestHypotensionMuscle, SkeletalHypotension, ControlledExercise TherapyHypotension, OrthostaticExercise ToleranceIntracranial HypotensionPhysical ExertionOxygen ConsumptionBlood PressureHeart RatePhysical EndurancePost and Core TechniqueHemodynamicsTime FactorsBicyclingRestPost-Exercise HypotensionPhysical FitnessCardiac OutputLactic AcidTrimethaphanResistance TrainingBradycardiaRunningPulmonary Gas ExchangeRegional Blood FlowAnaerobic ThresholdMuscle Stretching ExercisesEphedrineTreatment OutcomeVascular ResistanceAutonomic Nervous System DiseasesBreathing ExercisesAnesthesia, SpinalAnesthesia, ObstetricalLegOxygenPhysical Education and TrainingPostureAnalysis of VarianceRespirationElectrocardiographySympathetic Nervous SystemCardiovascular Physiological PhenomenaAdaptation, PhysiologicalAsthma, Exercise-InducedProspective StudiesEnergy MetabolismExercise Movement TechniquesGlycogenCarbon DioxideLactatesShockMuscle StrengthMuscle FatigueNorepinephrineCerebrovascular CirculationWeight LiftingDouble-Blind MethodAnesthesiaNitroprussideCross-Over StudiesBaroreflexMidodrineMuscle ContractionDogsVasodilationPlasma VolumeShock, SepticCardiovascular SystemBlood GlucoseEpinephrineStroke VolumeSyncopeAutonomic Nervous SystemHeartWalkingSweatingShy-Drager SyndromeBlood VolumeBlood Gas AnalysisSportsHeart FailureSingle-Blind MethodErgometryMotor ActivityRats, Sprague-DawleyOcular HypotensionHypovolemiaSupine PositionDyspneaQuadriceps MuscleBlood Flow VelocityFerricyanidesBody TemperatureHypertensionFollow-Up Studies