Knee JointKneeOsteoarthritis, KneeExercise TestArthroplasty, Replacement, KneeExercise TherapyKnee InjuriesKnee ProsthesisExerciseExercise TolerancePhysical ExertionOxygen ConsumptionMuscle, SkeletalPhysical EnduranceRange of Motion, ArticularKnee DislocationBicyclingHeart RateTibiaAnterior Cruciate LigamentPatellaQuadriceps MuscleResistance TrainingPhysical FitnessRestMuscle StrengthBiomechanical PhenomenaWeight-BearingArthralgiaTime FactorsTreatment OutcomeMuscle Stretching ExercisesMenisci, TibialMedial Collateral Ligament, KneeCartilage, ArticularRunningAnaerobic ThresholdWalkingPain MeasurementJoint InstabilityPulmonary Gas ExchangeLactic AcidLegArthroscopyPainOsteoarthritisRecovery of FunctionGaitBone MalalignmentBreathing ExercisesPosterior Cruciate LigamentBlood PressureLigaments, ArticularMuscle ContractionFollow-Up StudiesMuscle FatigueExercise Movement TechniquesWeight LiftingAnalysis of VariancePhysical Education and TrainingSportsRegional Blood FlowAdaptation, PhysiologicalAsthma, Exercise-InducedIsometric ContractionGlycogenJoint DiseasesSeverity of Illness IndexProspective StudiesEnergy MetabolismThighTorqueCardiac OutputMotor ActivityHemodynamicsSingle-Blind MethodPhysical Therapy ModalitiesProsthesis DesignRespirationOxygenElectromyographyErgometryMagnetic Resonance ImagingPostureCardiovascular Physiological PhenomenaAthletesBlood GlucoseProsthesis FailureQuality of LifeCross-Over StudiesJoint Deformities, AcquiredDouble-Blind MethodMovementDyspneaArthrometry, ArticularReproducibility of ResultsBody WeightReoperationLactatesElectrocardiography