hahahahaha!brilliant!
As mentioned above, cough and think of england!
It isn't a fitness test but you do have to have a reasonable level of fitness at the time you do your spirometry exam. smoking 40 a day and living on kebabs wont get you through it!
Good luck and enjoy.
One final thing, don't step too far inside the phsician's door until you have clear line of site on the KY! I would hate to b the person having a medical on the day they ran out!