Abdominal MusclesMusclesRectus AbdominisDiaphragmElectromyographyRespiratory MusclesMuscle ContractionMuscle Fibers, SkeletalMuscle, SkeletalIntercostal NervesAbdominal WallMuscle ProteinsIntercostal MusclesMuscle, SmoothAbdomenPressureRespiratory MechanicsNerve FibersMuscle FatigueMuscle, Smooth, VascularRespirationMuscle Fibers, Fast-TwitchPostureMuscle Fibers, Slow-TwitchInhalationMuscle DevelopmentPositive-Pressure Respiration, IntrinsicNephropidaeAbdominal CavityLordosisThoraxLaryngeal MusclesMuscle RelaxationIsometric ContractionDietary FiberExhalationHypercapniaLumbosacral RegionMuscle DenervationCoughBiomechanical PhenomenaElectric StimulationPelvisMitochondria, MusclePulmonary VentilationMyocytes, Smooth MuscleLung Volume MeasurementsPatient PositioningSupine PositionOculomotor MusclesAstacoideaMuscle SpindlesSpineLow Back PainMineral FibersDogsNeck Muscles