Thought i would also take advantage of this wonderfull new feature!....I have also bought this subject up previoulsy and would like to know what you think as a Doctor... I am 18 and for the past 4years have not really been exercising regularly. I used to play sports when i was at school but since then with being at college now just havent had time to exercise. However after a short stay in hopsital i was strongly idvised by my physio therapist to at least try and walk/jog for 10mins a day. So since then have been trampolining and rowing religiously for about 20mins at least every other day to keep my fitness levels up! So really i was just wondering if i have left this too late and if my lung function will ever improve ??also i dont know if you can answer this one either...but i dont do any kind of physio therepy nor flutter on a regular basis and haven't done for about 7yrs (eek!!), i dont know if ive left this too late now either? has the damage already been done? I would regard myself as being in pretty good health, i have my ups and downs but more recently have noticed a difference in my health (as in a bit more down!) I usually end up on I.V's at least twice a year sometimes more. My SAT levels are 97% if that helps!?!Many thanks,emma 18 cf uk