Anaerobic ThresholdExercise TestOxygen ConsumptionExercise ToleranceErgometryPulmonary Gas ExchangeExerciseHeat ExhaustionLactic AcidHeart RatePhysical EndurancePhysical ExertionRunningPhysical FitnessSensory ThresholdsRespirationCarbon DioxideHeart FailureBurnout, ProfessionalExercise TherapyPulmonary VentilationPhysical Education and TrainingSportsRespiratory Function TestsLactatesOxygenDepersonalizationTime FactorsCardiac OutputStroke VolumeAnalysis of VarianceMuscle, SkeletalProgrammed Cell Death 1 ReceptorDifferential ThresholdWalkingChronic DiseaseAuditory ThresholdHemodynamicsPredictive Value of TestsFatiguePain ThresholdElectrocardiographyTreatment OutcomeCase-Control StudiesProspective StudiesBlood PressureMuscle FatigueLymphocytic ChoriomeningitisMental Fatigue