Muscle WeaknessGuanidineGuanidinesFatigueMusclesMuscle, SkeletalMuscle ProteinsMyopathies, NemalineMuscle Fibers, SkeletalMuscular DiseasesRespiratory MusclesMuscle ContractionMuscle, SmoothNeuromuscular DiseasesMuscle, Smooth, VascularSleep DisordersMuscle DevelopmentEpisode of CareMuscle FatigueMuscular AtrophyPolymyositisMyositisMuscle Fibers, Slow-TwitchProtein DenaturationMuscle Fibers, Fast-TwitchDiaphragmMuscle StrengthQuadriceps MuscleFibromyalgiaElectromyographyMitochondria, MuscleDermatomyositisQuestionnairesHypokalemic Periodic ParalysisMuscle DenervationIsometric ContractionMyopathies, Structural, CongenitalMuscular DystrophiesMyasthenia GravisMyasthenic Syndromes, CongenitalTime FactorsMyocytes, Smooth MuscleDisorders of Excessive SomnolenceMyositis, Inclusion BodyOculomotor MusclesNeck MusclesMuscle HypotoniaRespiratory ParalysisMuscular Dystrophy, DuchenneNeuromuscular JunctionMethylguanidineSeverity of Illness IndexMuscle, StriatedMuscle Strength DynamometerSleep DeprivationMuscular Dystrophies, Limb-GirdleMuscle SpindlesMuscle RelaxationPapillary MusclesRhabdomyolysisMyosin Heavy ChainsPainOphthalmoplegiaDistal MyopathiesSleepCreatine KinaseLambert-Eaton Myasthenic SyndromeHypokalemiaMuscular Dystrophy, AnimalMice, Inbred mdxMyotonic DystrophyMyofibrilsCircular DichroismAbdominal MusclesInternational Classification of DiseasesFacial MusclesCharcot-Marie-Tooth DiseaseMuscle CellsQuality of LifeReceptors, CholinergicCross-Sectional StudiesMonocrotophosMasseter MuscleTreatment OutcomeKineticsGlycogen Storage Disease Type IIMasticatory MusclesProspective StudiesMutationMyotoniaCalciumIntercostal MusclesParalyses, Familial PeriodicBiomechanical PhenomenaPostpoliomyelitis SyndromeInspiratory CapacityDystrophinProbabilitySex FactorsMotor Neurons