Muscle, SkeletalMusclesMuscle ProteinsMuscle StrengthMuscular AtrophySarcopeniaMuscle Fibers, SkeletalMuscle, SmoothMyostatinMuscle DevelopmentMuscle ContractionMuscle, Smooth, VascularTensile StrengthWeight GainMuscle WeaknessMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle FatigueHand StrengthMuscle DenervationBody CompositionOrgan SizeQuadriceps MuscleMitochondria, MuscleMass SpectrometryIsometric ContractionAgingMuscle Strength DynamometerNeck MusclesShear StrengthRespiratory MusclesMyocytes, Smooth MuscleBody WeightBody Mass IndexHindlimb SuspensionOculomotor MusclesHypertrophyMuscular Disorders, AtrophicAbsorptiometry, PhotonSatellite Cells, Skeletal MuscleTime FactorsMuscle, StriatedMuscular DiseasesMuscle SpindlesThighMuscle RelaxationExerciseBiomechanical PhenomenaMuscle CellsPapillary MusclesResistance TrainingElectromyographyHindlimbAbdominal MusclesPectoralis MusclesLegMasseter MuscleIntercostal MusclesCachexiaWeight LiftingCompressive StrengthMyosin Heavy ChainsPhysical EnduranceMasticatory MusclesFacial MusclesTemporal MuscleAdipose TissueMyofibrilsKneeMaterials TestingEnergy MetabolismMyoblastsElectric StimulationPhysical ExertionMuscular Dystrophy, AnimalModels, BiologicalAdaptation, PhysiologicalAnthropometryStress, MechanicalOxygen ConsumptionImmobilizationCells, CulturedRats, Sprague-DawleyDiaphragmMice, Inbred C57BLSKP Cullin F-Box Protein LigasesRNA, MessengerSignal TransductionRabbitsMyoD ProteinAnalysis of VarianceCalciumMolecular Sequence DataInsulin-Like Growth Factor ITorqueDental BondingRats, WistarDental Stress AnalysisSpectrometry, Mass, Electrospray IonizationPsoas Muscles