Muscle WeaknessMyopathies, NemalineMuscle CrampMuscular DiseasesMuscle, SkeletalMuscular AtrophyMusclesMice, Inbred mdxMuscular Dystrophy, DuchenneUtrophinMuscle ProteinsMuscle Fibers, SkeletalRespiratory MusclesMuscle ContractionMuscle, SmoothNeuromuscular DiseasesMuscle, Smooth, VascularPhenotypeMuscle DevelopmentMuscle FatigueDisease Models, AnimalPolymyositisMyositisMuscle Fibers, Slow-TwitchMuscle Fibers, Fast-TwitchDiaphragmMuscle StrengthQuadriceps MuscleElectromyographyMitochondria, MuscleDermatomyositisHypokalemic Periodic ParalysisMuscle DenervationIsometric ContractionMyopathies, Structural, CongenitalMuscular DystrophiesMyasthenia GravisMyasthenic Syndromes, CongenitalMyocytes, Smooth MuscleMyositis, Inclusion BodyOculomotor MusclesNeck MusclesMuscle Hypotonia