AtrophyMusclesMuscular AtrophyMuscle ProteinsMuscle, SkeletalMuscle, SmoothMuscle Fibers, SkeletalMuscle, Smooth, VascularMuscle DevelopmentMuscle ContractionOptic AtrophyMuscular Atrophy, SpinalMuscle DenervationMuscle Fibers, Fast-TwitchMuscle FatigueMuscle Fibers, Slow-TwitchMultiple System AtrophyMitochondria, MuscleMyocytes, Smooth MuscleSpinal Muscular Atrophies of ChildhoodOculomotor MusclesNeck MusclesMuscle WeaknessMuscle, StriatedMuscle SpindlesMuscle RelaxationRespiratory MusclesPapillary MusclesQuadriceps MuscleOlivopontocerebellar AtrophiesAbdominal MusclesMuscle CellsElectromyographyMasseter MuscleGyrate AtrophyMasticatory MusclesFacial MusclesSatellite Cells, Skeletal MuscleIntercostal MusclesIsometric ContractionMuscular DiseasesMuscular Disorders, AtrophicHindlimb SuspensionGeographic AtrophyPectoralis MusclesMagnetic Resonance ImagingMyofibrilsHindlimbMotor NeuronsSurvival of Motor Neuron 1 ProteinTime FactorsMyosin Heavy ChainsPsoas MusclesDiaphragmCells, CulturedElectric StimulationTemporal MuscleRabbitsOptic Atrophy, Autosomal DominantSMN Complex ProteinsMyostatinOrgan SizeCalciumPharyngeal MusclesSKP Cullin F-Box Protein LigasesRats, Sprague-DawleyRNA, MessengerNeuromuscular JunctionBiomechanical PhenomenaAgingMyoblastsRats, WistarSurvival of Motor Neuron 2 ProteinBrainGlycogenMuscular Dystrophy, AnimalHypertrophyDisease Models, AnimalActinsMice, Inbred C57BLRegenerationMuscle CrampBulbo-Spinal Atrophy, X-LinkedSarcomeresMyoD ProteinLegGene Expression RegulationImmobilizationSignal TransductionImmunohistochemistryMyoblasts, SkeletalMyocardiumPhysical ExertionMice, Inbred mdxMice, TransgenicNeuromuscular DiseasesGastritis, AtrophicExerciseMuscle Stretching ExercisesMolecular Sequence Data