Abdominal MusclesMusclesRectus AbdominisElectromyographyDiaphragmRespiratory MusclesMuscle ContractionMuscle, SkeletalIntercostal NervesAbdominal WallAbdomenMuscle ProteinsIntercostal MusclesMuscle, SmoothPressureRespiratory MechanicsPostureMuscle FatigueThoraxMuscle Fibers, SkeletalMuscle, Smooth, VascularRespirationPositive-Pressure Respiration, IntrinsicInhalationNephropidaeMuscle DevelopmentAbdominal CavityLordosisLaryngeal MusclesLumbosacral RegionMuscle RelaxationExhalationIsometric ContractionHypercapniaBiomechanical PhenomenaPelvisMuscle Fibers, Fast-TwitchCoughMuscle DenervationSpineMuscle Fibers, Slow-TwitchMovementLow Back PainPulmonary VentilationMyocytes, Smooth MuscleNeck MusclesLung Volume MeasurementsElectric StimulationSupine PositionMitochondria, MusclePatient PositioningAstacoidea