ErgometryExercise TestMaximal Voluntary VentilationOxygen ConsumptionPhysical ExertionExercise ToleranceWheelchairsExerciseArmBicyclingPulmonary Gas ExchangePhysical EnduranceHeart RatePhysical FitnessPhysical Education and TrainingQuadriplegiaLegExercise TherapySportsCardiovascular Physiological PhenomenaRespiratory Function TestsParaplegiaRestPulmonary VentilationGenitalia, FemaleRunningCardiac OutputDyspneaLactic AcidRespirationTime FactorsSex CharacteristicsMuscle, SkeletalBlood PressureSpinal Cord InjuriesSexual Behavior, AnimalEnergy MetabolismCross-Over StudiesWalkingForced Expiratory VolumeSex FactorsPulmonary Disease, Chronic ObstructiveAnalysis of VarianceCarbon DioxideOxygenRegional Blood FlowReproductionHemodynamicsTreatment OutcomeLungStroke VolumeDouble-Blind MethodCondoms, FemaleReproducibility of ResultsOvariectomyFertilityCopulationInfertility, FemaleMating Preference, Animal