Muscle ContractionMuscle, SkeletalSarcolemmaMusclesMuscle Fibers, SkeletalIsometric ContractionMuscle ProteinsMuscle, SmoothMuscle FatigueTroponin CTroponinMuscle, Smooth, VascularCalciumMyosinsElectric StimulationRabbitsTropomyosinMuscle DevelopmentMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchMuscle RelaxationRegional Blood FlowMitochondria, MuscleMuscle DenervationMyocardial ContractionElectromyographyUterine ContractionMyocytes, Smooth MuscleMuscle SpindlesMyofibrilsMuscle, StriatedPapillary MusclesDystrophinNeck MusclesMyocardiumOculomotor MusclesSatellite Cells, Skeletal MuscleMuscular DiseasesQuadriceps MuscleMuscular Dystrophy, AnimalHindlimbGuinea PigsMuscle WeaknessMuscle CellsTime FactorsRespiratory MusclesMuscular AtrophyTracheaRats, Sprague-DawleySarcomeresAbdominal MusclesRats, WistarActinsVasoconstrictionMotor NeuronsBiomechanical PhenomenaDiaphragmSarcoplasmic ReticulumFacial MusclesNeuromuscular JunctionCells, CulturedMice, Inbred mdxMasticatory MusclesPhysical ExertionPotassium ChlorideAdenosine TriphosphateGlycogenDogsMyosin Heavy ChainsDose-Response Relationship, DrugMasseter MusclePsoas MusclesAcetylcholineKineticsMyosin Light ChainsModels, BiologicalPeristalsisIntercostal MusclesCaffeineIsotonic ContractionPhosphorylationMyoblastsTorqueRNA, MessengerSignal TransductionExercisePotassiumMembrane PotentialsCarbacholCatsAnuraUrinary BladderHeartInsulinGastrointestinal MotilityMuscular DystrophiesRyanodine Receptor Calcium Release ChannelStress, MechanicalPectoralis MusclesOxygen Consumption