Respiratory MusclesMuscle ContractionDiaphragmBreathing ExercisesMusclesWork of BreathingIntercostal MusclesMuscle WeaknessMuscle FatigueMaximal Voluntary VentilationMuscle, SkeletalMuscle, SmoothAbdominal MusclesRespiratory MechanicsInhalationIsometric ContractionMuscle StrengthNeuromuscular DiseasesRespiratory Function TestsRespirationMuscle ProteinsMuscle Fibers, SkeletalMuscle, Smooth, VascularElectromyographyInspiratory CapacityRespiratory ParalysisPressureVital CapacityDyspneaLung Volume MeasurementsRespiratory InsufficiencyPulmonary VentilationMuscle DevelopmentUterine ContractionPhysical EnduranceMyocardial ContractionVentilator WeaningLung Diseases, ObstructiveExercise ToleranceElectric StimulationHypercapniaThoraxMuscle RelaxationNeck MusclesPhrenic NerveSpirometryMuscle Fibers, Fast-TwitchMuscular DiseasesMaximal Expiratory Flow RateTidal VolumeRibsAir PressureMuscle DenervationOxygen ConsumptionRespiration, ArtificialMuscle Fibers, Slow-TwitchRespiratory Physiological PhenomenaThoracic WallMyocytes, Smooth MuscleResidual VolumeQuadriceps MuscleTotal Lung CapacityMuscular AtrophyHypoventilationExerciseChenopodium ambrosioidesCalciumPulmonary Disease, Chronic ObstructiveMitochondria, MuscleMuscle SpindlesTime FactorsExercise TestPhysical ExertionPapillary MusclesXiphoid BoneRespiration DisordersCarbon DioxideOculomotor MusclesMotor NeuronsLungForced Expiratory VolumeRespiratory TherapyQuadriplegiaMuscle, StriatedRectus AbdominisGuinea PigsGymnasticsPlethysmography, ImpedancePulmonary Gas ExchangeExhalationLegVasoconstrictionBlood Gas AnalysisRabbitsMuscular Dystrophy, DuchenneDogsBicyclingHyperventilationPain, ReferredChlorfenvinphos