[fpernett]

Hi SanSan
The bronchoprovocation Methacoline test is a test to rule out asthma when the spirometry is normal, as is your last one. Methacoline is a bronchoconstrictor and it`s nebulized until the FEV1 reduces 20% from baseline. In your case it`s normal. I don`t know if your doctor had found wheezing on examination, but the results are normal. I don`t think of a real danger in pool freediving, but deep freediving with bronchoconstriction is not good. If there is doubt regarding the diagnosis of asthma, I reccomend you to get a peak flow meter and test on a daily basis if you are thinking in deep freediving.