Anaerobic ThresholdExercise TestExercise ToleranceOxygen ConsumptionExerciseExercise TherapyPulmonary Gas ExchangeErgometryMusclesPhysical ExertionMuscle, SkeletalHeart RateLactic AcidPhysical EnduranceRunningPhysical FitnessMuscle ProteinsMuscle, SmoothRespirationMuscle Fibers, SkeletalHeart FailureSensory ThresholdsMuscle ContractionMuscle, Smooth, VascularCarbon DioxidePhysical Education and TrainingTime FactorsRespiratory Function TestsSportsMuscle DevelopmentOxygenMuscle FatiguePulmonary VentilationLactatesStroke VolumeCardiac OutputAnalysis of VarianceWalkingMuscle Fibers, Fast-TwitchHemodynamicsMuscle Fibers, Slow-TwitchMuscle DenervationDifferential ThresholdMitochondria, MuscleBlood PressureTreatment OutcomeElectrocardiographyPredictive Value of TestsQuadriceps MuscleMyocytes, Smooth MuscleChronic DiseaseRespiratory MusclesAuditory ThresholdNeck MusclesOculomotor MusclesMuscle WeaknessPain ThresholdMuscle SpindlesBicyclingElectromyographyMuscle RelaxationMuscle, StriatedMuscle Stretching ExercisesProspective StudiesAbdominal MusclesCase-Control StudiesIsometric ContractionRestPapillary MusclesResistance TrainingGlycogenMuscle CellsLegMasseter MuscleElectric StimulationMuscular AtrophyFacial MusclesIntercostal MusclesMasticatory MusclesMuscular DiseasesAdaptation, PhysiologicalRegional Blood FlowHindlimbSatellite Cells, Skeletal MuscleBreathing ExercisesEnergy MetabolismPectoralis Muscles