TerbutalineAsthmaAdrenergic beta-AgonistsBronchodilator AgentsAdministration, InhalationNebulizers and VaporizersTocolytic AgentsBudesonidePeak Expiratory Flow RateAnti-Asthmatic AgentsForced Expiratory VolumeAdrenergic beta-2 Receptor AgonistsAlbuterolAerosolsEthanolaminesAsthma, Exercise-InducedPregnenedionesButoxamineFenoterolMetaproterenolBronchiReceptors, Adrenergic, beta-2Double-Blind MethodBronchoconstrictionMaximal Expiratory Flow RateButylaminesAdrenal Cortex HormonesRespiratory Function TestsChlorofluorocarbonsLungPrenalterolPowdersAsthma, OccupationalCapillary Leak SyndromeMagnetocardiographyMethacholine ChlorideReceptors, Adrenergic, betaBronchial HyperreactivityRespiratory SoundsIpratropiumVital CapacityAllergensRespiratory TherapyCross-Over StudiesSpirometryLung Diseases, ObstructivePropranololPulmonary Alveoli