Hey everyone pretty new here but I'll just keep this simple. Basically I went for my first medical in November 2015 and failed due to my peak flow reading being around about 450 which I understand is low for me (age 19 ). When told about the failure she said that everything else was perfect but due to the low reading I would fail and have a re medical in June 2016. I have never had asthma in my life and never had any breathing difficulties. I've been training since December now and can't seem to get my peak flow about 450 and need any suggestions on what would work effectively other than running and swimming. If I was to ring my GP and go for a lung cuntion test and a spirometry test and they came back good would this help my cause for my second medical if my peak flow was low?