Abdominal MusclesMusclesMuscle, SkeletalMuscle ContractionRectus AbdominisElectromyographyMuscle ProteinsMuscle, SmoothRespiratory MusclesDiaphragmMuscle Fibers, SkeletalMuscle DevelopmentMuscle, Smooth, VascularMuscle FatigueIntercostal MusclesNeck MusclesIntercostal NervesAbdominal WallPressureRespiratory MechanicsMuscle Fibers, Fast-TwitchAbdomenFacial MusclesMuscle DenervationMuscle RelaxationPostureMuscle Fibers, Slow-TwitchRespirationMuscle, StriatedMyocytes, Smooth MuscleIsometric ContractionMitochondria, MuscleInhalationOculomotor MusclesNephropidaePositive-Pressure Respiration, IntrinsicThoraxBiomechanical PhenomenaMasticatory MusclesAbdominal CavityMuscle SpindlesLordosisPelvisMuscle WeaknessPapillary MusclesMasseter MuscleElectric StimulationLaryngeal MusclesPectoralis MusclesMuscular AtrophyQuadriceps MuscleLumbosacral RegionMuscle CellsExhalationHypercapniaMovementPharyngeal MusclesCoughPhysical ExertionSpineDogsMuscular DiseasesTime FactorsSatellite Cells, Skeletal MuscleHindlimbTemporal MusclePulmonary VentilationMotor NeuronsStomachExercise TherapyLung Volume MeasurementsRecruitment, NeurophysiologicalRats, Sprague-DawleySupine PositionExercisePatient PositioningAstacoideaLow Back PainPhrenic Nerve