Exercise TherapyMetabolic EquivalentExercise TestPhysical Therapy ModalitiesExerciseMuscle StrengthExercise ToleranceRange of Motion, ArticularGaitPhysical ExertionOsteoarthritis, KneePain MeasurementMuscle, SkeletalTreatment OutcomeOxygen ConsumptionPhysical EnduranceMuscle ContractionHeart RateMuscle FatigueBicyclingRestPhysical FitnessMuscle Stretching ExercisesRunningTime FactorsResistance TrainingTorqueAnaerobic ThresholdLactic AcidPulmonary Gas ExchangeIsotonic ContractionElectromyographyLegBlood PressureBreathing ExercisesPhysical Education and TrainingRegional Blood FlowHand StrengthQuadriceps MuscleMusclesAdaptation, PhysiologicalEnergy MetabolismWeight LiftingGlycogenKneeAsthma, Exercise-InducedAnalysis of VarianceExercise Movement TechniquesHemodynamicsCardiac OutputBiomechanical PhenomenaMuscle Fibers, SkeletalOxygenWalkingErgometrySportsPhosphocreatineRespirationMotor ActivityCardiovascular Physiological PhenomenaHeartForearmLactatesElectric StimulationCross-Over StudiesElectrocardiographyBlood GlucoseThighStroke VolumeDyspneaAgingBody WeightHeart FailureArmSweatingCarbon DioxideElbowRespiratory Function TestsSwimmingVasodilationMyocardial ContractionMuscle RelaxationReference ValuesFatigueSingle-Blind MethodBody Temperature RegulationVolitionSarcomeresRespiratory MechanicsAthletesMusculoskeletal Physiological PhenomenaVascular ResistanceNorepinephrineVasoconstrictionRecovery of FunctionBody CompositionIsometric ContractionMuscle Fibers, Fast-TwitchCoronary DiseaseBody Temperature