Muscle Fibers, SkeletalMuscle Fibers, Slow-TwitchHindlimb SuspensionMuscle, SkeletalMuscle Fibers, Fast-TwitchMusclesMuscle ContractionMyosin Heavy ChainsRats, WistarMuscle DenervationMuscle ProteinsMuscular AtrophyMuscle DevelopmentMuscle FatigueIsometric ContractionMyofibrilsMuscle, SmoothHindlimbMuscle SpindlesNerve FibersMitochondria, MuscleH-ReflexElectric StimulationElectromyographyMuscle, Smooth, VascularMotor NeuronsNeuromuscular JunctionSarcomeresRana temporariaGlycogenImmobilizationTime FactorsMuscular DiseasesCalciumPsoas MusclesClenbuterolCatsDietary FiberMyosinsMuscular Dystrophy, AnimalMotor EndplateDiaphragmMuscle RelaxationBiomechanical PhenomenaReflex, StretchMuscle WeaknessPhysical Conditioning, AnimalRats, Sprague-DawleyOculomotor MusclesIsotonic ContractionRegenerationSatellite Cells, Skeletal MuscleHistocytochemistryOrgan SizeRabbitsMuscle, StriatedSarcolemmaRats, Inbred StrainsMice, Inbred mdxRana pipiensMembrane PotentialsTendonsAction PotentialsSkeletal Muscle MyosinsThoracicaTarsus, AnimalSarcoplasmic ReticulumBody WeightNeck MusclesMyocytes, Smooth MuscleAgingNeural ConductionQuadriceps MuscleInsulinProtein IsoformsMasseter MuscleAnuraMicroscopy, ElectronPhysical ExertionMineral FibersRNA, MessengerGlucoseStress, MechanicalCaffeineMasticatory MusclesAdaptation, PhysiologicalHypertrophyRespiratory MusclesCitrate (si)-SynthaseLegDantrolenePapillary MusclesMuscular Disorders, AtrophicDystrophinSuccinate DehydrogenaseMuscle CellsAbdominal MusclesMyostatinIntercostal MusclesReceptors, Cholinergic