Abdominal MusclesThoraxMusclesMuscle, SkeletalRectus AbdominisMuscle ContractionMuscle ProteinsRespiratory MusclesElectromyographyMuscle, SmoothDiaphragmMuscle Fibers, SkeletalMuscle, Smooth, VascularMuscle DevelopmentMuscle FatigueIntercostal MusclesAbdomenRespiratory MechanicsIntercostal NervesAbdominal WallPressureMuscle Fibers, Fast-TwitchMuscle DenervationMuscle RelaxationRespirationMuscle Fibers, Slow-TwitchPostureMyocytes, Smooth MuscleMitochondria, MuscleInhalationNephropidaePositive-Pressure Respiration, IntrinsicIsometric ContractionNeck MusclesOculomotor MusclesMuscle, StriatedAbdominal CavityMuscle SpindlesLordosisMuscle WeaknessPapillary MusclesBiomechanical PhenomenaLaryngeal MusclesQuadriceps MusclePelvisLumbosacral RegionMuscle CellsExhalationHypercapniaElectric StimulationMasseter MuscleFacial MusclesMasticatory MusclesCoughMovementMuscular AtrophyLung Volume MeasurementsSatellite Cells, Skeletal MusclePhysical ExertionDogsSpinePulmonary VentilationTime FactorsPectoralis MusclesRecruitment, NeurophysiologicalSupine PositionPatient PositioningMuscular DiseasesAstacoideaLow Back PainPhrenic NerveExerciseStomachRats, Sprague-DawleySurgical Flaps