Muscle Fibers, Fast-TwitchMusclesMuscle Fibers, Slow-TwitchMuscle Fibers, SkeletalMuscle ContractionMuscle, SkeletalHigh-Intensity Focused Ultrasound AblationMuscle DenervationMuscle ProteinsSarcoplasmic ReticulumUltrasonic TherapyCalcium-Transporting ATPasesRabbitsCalciumMuscle DevelopmentMuscle, SmoothMuscle FatigueElectric StimulationTime FactorsRana temporariaNerve FibersMyofibrilsIsometric ContractionMuscle, Smooth, VascularTransducersNeuromuscular JunctionExerciseNeck MusclesElectromyographyMyosin Heavy ChainsDiaphragmAcousticsMitochondria, MuscleSarcomeresPhysical ExertionErgometryMuscle SpindlesPsoas MusclesAnuraRana pipiensMotor NeuronsPhysical EnduranceDietary FiberMuscle RelaxationOculomotor MusclesMagnetic Resonance ImagingMuscular AtrophyBiomechanical PhenomenaRunningMuscular DiseasesOxygen ConsumptionAction PotentialsMembrane PotentialsPapillary MusclesMuscle, StriatedUltrasound, High-Intensity Focused, TransrectalMuscle WeaknessPhysical Education and TrainingUltrasonicsHindlimbMotor EndplateCatsQuadriceps MuscleThoracicaModels, BiologicalRespiratory MusclesMasseter MuscleResistance TrainingMyosinsKineticsMyocytes, Smooth MuscleMuscular Dystrophy, AnimalMagnetic Resonance Imaging, InterventionalPhysical Conditioning, AnimalSatellite Cells, Skeletal MuscleRats, Sprague-DawleyMasticatory MusclesThermographyAbdominal MusclesMineral FibersThermal ConductivityHistocytochemistryCaffeineVolitionLightIntercostal MusclesBicyclingSnakesLactic AcidLasersMice, Inbred mdxTransducers, PressureRanidaeSarcolemmaRats, WistarTemperatureMuscle CellsRana esculentaNeural ConductionFacial Muscles