Respiratory MusclesDiaphragmBreathing ExercisesWork of BreathingMusclesIntercostal MusclesMuscle WeaknessMaximal Voluntary VentilationMuscle FatigueAbdominal MusclesRespiratory MechanicsInhalationSeverity of Illness IndexMuscle StrengthMuscle, SkeletalNeuromuscular DiseasesRespiratory Function TestsRespirationMuscle ProteinsMuscle ContractionMuscle, SmoothInspiratory CapacityMuscle Fibers, SkeletalRespiratory ParalysisVital CapacityDyspneaMuscle, Smooth, VascularLung Volume MeasurementsRespiratory InsufficiencyPressureElectromyographyPulmonary VentilationMuscle DevelopmentPhysical EnduranceLung Diseases, ObstructiveVentilator WeaningExercise ToleranceHypercapniaThoraxSpirometryNeck MusclesMaximal Expiratory Flow RatePhrenic NerveTidal VolumeMuscular DiseasesRespiration, ArtificialRibsAir PressureMuscle Fibers, Fast-TwitchThoracic WallResidual VolumeMuscle DenervationRespiratory Physiological PhenomenaPulmonary Disease, Chronic ObstructiveOxygen ConsumptionHypoventilationTotal Lung CapacityMuscle Fibers, Slow-TwitchMuscular AtrophyExercise TestAirway ResistanceQuadriceps MuscleForced Expiratory VolumeMyocytes, Smooth MuscleMitochondria, MuscleExerciseXiphoid BoneRespiration DisordersCarbon DioxideRespiratory TherapyLungQuadriplegiaOculomotor MusclesTime FactorsExhalationPulmonary Gas ExchangeGymnasticsMuscle, StriatedPlethysmography, ImpedanceRectus AbdominisMuscle SpindlesPhysical ExertionBlood Gas AnalysisMuscle RelaxationPain, ReferredMuscular Dystrophy, DuchenneHyperventilationChlorfenvinphosPapillary MusclesBicyclingSupinationMuscular DystrophiesLegInsufflationFunctional Residual CapacityCoughMuscle CellsPostpoliomyelitis SyndromeElectric StimulationMeconium Aspiration Syndrome