 This clinical study will evaluate and establish the protective effects of Amphastars Albuterol Sulfate HFA Inhalation Aerosol Albuterol-HFA, in preventing exercise-induced bronchoconstriction EIB in adolescent and adult asthmatic patients, in comparison with 1 Proventil-HFA Reference drug and Active Control , and 2 Placebo-HFA control HFA propellant only. Safety of the test drug, Albuterol-HFA, will also be evaluated in comparison to the Active and Placebo Controls. Analyses will be performed to determine if the Armstrongs Albuterol-HFA has resulted in a significant bronchoprotective effect, with attenuated Max Fall in FEV1, in comparison to the Placebo-HFA control. 