Anaerobic ThresholdExercise TestOxygen ConsumptionExercise ToleranceErgometryPulmonary Gas ExchangeExerciseEnergy MetabolismLactic AcidHeart RatePhysical ExertionSensory ThresholdsRunningPhysical EndurancePhysical FitnessRespirationCarbon DioxideHeart FailureExercise TherapyEnergy IntakePulmonary VentilationRespiratory Function TestsSportsPhysical Education and TrainingEnergy TransferLactatesOxygenStroke VolumeTime FactorsCardiac OutputDifferential ThresholdAnalysis of VarianceWalkingAuditory ThresholdPredictive Value of TestsHemodynamicsPain ThresholdMuscle, SkeletalElectrocardiographyChronic DiseaseTreatment OutcomeCase-Control StudiesProspective StudiesBlood Pressure