Anaerobic ThresholdExercise TestOxygen ConsumptionExercise ToleranceErgometryPulmonary Gas ExchangeExerciseHeart RateLactic AcidPhysical ExertionSensory ThresholdsPhysical EnduranceRunningPhysical FitnessRespirationHeart FailureCarbon DioxideExercise TherapyPulmonary VentilationRespiratory Function TestsPhysical Education and TrainingSportsLactatesOxygenStroke VolumeCardiac OutputDifferential ThresholdTime FactorsWalkingAnalysis of VarianceAuditory ThresholdPredictive Value of TestsPain ThresholdHemodynamicsElectrocardiographyChronic DiseaseMuscle, SkeletalTreatment OutcomeCase-Control StudiesProspective StudiesBlood Pressure