The purpose of this study is to find out if Symbicort® (budesonide/formoterol), a new combination asthma medication, is more effective than budesonide alone in controlling exercise induced asthma.
The investigators hypothesize that in children and adults who suffer from asthma and exercise induced asthma there will be less decline in lung function associated with exercise when they receive the study medication.
40 subjects will be randomized to receive both active medications in separate testing periods to determine the effect on their lung function after exercise testing.
