DyspneaPhysical ExertionHeart NeoplasmsRespiratory Function TestsLung Diseases, InterstitialTomography, X-Ray ComputedEchocardiographyTreatment OutcomeExercise TestExercise TolerancePulmonary Disease, Chronic ObstructiveExercisePerceptionOxygen ConsumptionHeart RateForced Expiratory VolumePhysical EnduranceSpirometryDyspnea, ParoxysmalBicyclingVital CapacityRespiratory MusclesLung Diseases, ObstructiveMuscle FatigueErgometryWalkingRespirationSeverity of Illness IndexFatiguePsychophysiologyCross-Over StudiesRadiography, ThoracicRunningLiftingOxygen Inhalation TherapyComputer TerminalsAthletic PerformanceMaximal Expiratory Flow RateLungQuality of LifeExercise TherapyFatal OutcomeCoughSportsAirway ObstructionMartial ArtsHeart FailureInspiratory CapacityRespiration DisordersElectromyographyOccupational DiseasesMuscle, SkeletalTrack and FieldQuestionnairesPhysical FitnessTime FactorsOxygenBreathing ExercisesLactic AcidProspective Studies