Quadriceps MuscleThighMuscle StrengthMuscle WeaknessKnee JointIsometric ContractionMuscle, SkeletalFemoral NerveKneeTorquePatellaMuscle FatiguePatellofemoral Pain SyndromeMuscle ContractionKnee InjuriesAnterior Cruciate LigamentMuscle Strength DynamometerElectromyographyLegBiomechanical PhenomenaPatellar LigamentElectric Stimulation TherapySequence Analysis, DNARange of Motion, ArticularSpecies SpecificityOsteoarthritis, KneeMusclesRNA, Ribosomal, 16SMice, Inbred StrainsExerciseTendonsDNA, RibosomalPhysical Conditioning, HumanBacterial Typing TechniquesGaitMuscular AtrophyGenes, BacterialPhysical EnduranceEscherichia coliWeight LiftingVirulenceRuptureExercise TherapyPatellofemoral JointH-ReflexArthroplasty, Replacement, KneeTendon InjuriesHydrarthrosisMutationJoint InstabilityMusculoskeletal Physiological PhenomenaMuscular DiseasesPhenotypeWeight-BearingElectric StimulationMicrobial Sensitivity TestsDNA, BacterialAnti-Bacterial AgentsSerotypingCulture MediaSprains and StrainsTime FactorsBase CompositionPulmonary Disease, Chronic ObstructiveRecovery of FunctionExercise TestPlasmidsAnterior Cruciate Ligament ReconstructionCoxa VaraPhysical ExertionGenes, rRNARespiratory MusclesWalkingPolymerase Chain ReactionOxygen ConsumptionAmino Acid SequenceProprioceptionTrack and FieldBicyclingDrug Resistance, MicrobialFemurMovementGenome, BacterialAthletic InjuriesSoil MicrobiologyGenotypeGene Expression Regulation, BacterialResistance TrainingBone MalalignmentPhysical Education and TrainingAnalysis of VarianceSoccerNucleic Acid HybridizationRNA, BacterialStress, MechanicalMolecular Sequence DataMuscle Fibers, SkeletalHipGenetic VariationArthralgia