Abdominal MusclesMusclesRectus AbdominisExercise TestExercise TherapyElectromyographyDiaphragmRespiratory MusclesMuscle, SkeletalExerciseMuscle ContractionExercise TolerancePhysical ExertionMuscle ProteinsIntercostal NervesRespiratory MechanicsAbdominal WallAbdomenIntercostal MusclesPressureMuscle, SmoothMuscle FatigueRespirationMuscle Fibers, SkeletalPostureMuscle, Smooth, VascularInhalationPositive-Pressure Respiration, IntrinsicNephropidaeMuscle DevelopmentAbdominal CavityThoraxLordosisIsometric ContractionLaryngeal MusclesMuscle RelaxationOxygen ConsumptionExhalationHypercapniaLumbosacral RegionPhysical EnduranceMuscle Fibers, Fast-TwitchMuscle Fibers, Slow-TwitchCoughTime FactorsMuscle DenervationBiomechanical PhenomenaMitochondria, MusclePelvisSupine PositionLung Volume MeasurementsLow Back PainMuscle StrengthPulmonary VentilationMyocytes, Smooth MuscleElectric StimulationQuadriceps MusclePatient PositioningSpineMovementDogsNeck MusclesRespiratory Function TestsAstacoideaRecruitment, Neurophysiological