Weight LiftingResistance TrainingPhysical Education and TrainingMuscle StrengthExerciseMuscle, SkeletalPhysical FitnessPhysical EnduranceDrug ResistanceExercise TherapyDrug Resistance, MicrobialDrug Resistance, BacterialAdaptation, PhysiologicalBody CompositionTorqueIsometric ContractionDrug Resistance, NeoplasmQuadriceps MuscleVascular ResistanceHypertrophyPhysical Conditioning, AnimalKneeInservice TrainingDrug Resistance, MultipleDisease ResistanceLegMuscle WeaknessAgingMuscle ContractionPhysical Conditioning, HumanDrug Resistance, ViralDrug Resistance, Multiple, BacterialPlyometric ExercisePostural BalanceTime FactorsMuscle Fibers, SkeletalPatellar Ligament