ExerciseGenetics, BehavioralExercise TestExercise TherapyExercise TolerancePhysical ExertionSocial ParticipationPatient ParticipationOxygen ConsumptionPhysical EnduranceConsumer ParticipationMuscle, SkeletalHeart RateBicyclingPhysical FitnessSportsRestResistance TrainingRunningTime FactorsAnaerobic ThresholdMuscle Stretching ExercisesPulmonary Gas ExchangeLactic Acid