I guess in many ways, my son also has "mild CF" right now. His GI issues are kept in check through his enzymes and antacids. He also does the "vest" treatment twice a day which so far has kept his lungs fairley healhty. He goes to preschool three mornings a week and spends his afternoon running around with his friends and/or sisters. The optomistic part of me hopes that this will always be the case, but in reality I do not know what is in store for him or his health. That is the big mystery about CF. Even with the same genetic mutations, CF affects each person so differently. Some children are born with a lot of problems and really battle CF from day one, while others enjoy many years of good health. There are even others who do exceedingly well up into their teens and twenties without any major problems. Sometimes, it is this unknown is the thing that scares me the most about CF. However, other times, it is also the thing that gives me the most hope. We hope that by taking advantage of these "healthy years" we will help give Sean the greatest chance for a long, healthy and happy life. Therefore, we treat Sean's CF very seriously and very aggressively. He does his medicine and chest therapy treatments every day, spends lots of time running around outside exercising, and visits his doctor at least every three or four months for checkups. We also wash our hands all the time and are very careful about exposure to colds and germs. I feel fortunate that he is as healthy as he is right now and I am determinded to keep him that way.I know what you mean, as a parent, I also constantly crave "reassurance" about my son's future. I wish I had all the answers - if I did, then I could sleep a lot easier at night

But to answer your questions, unfortunately, there is no real answer. I think the fact that your daughters are 4 and 6 and are still very healthy is a good sign. The only advice that I can give is what Sean's doctors repeatedly tell me -- and that is children who are active and involved with sports generally tend to stay out of the hospital more than children who aren't as active. (I hope I don't offend anyone with this statement, b/c I know there are some very active children out there who still have frequent hospitalizations.) I am just repeating their "general rule of thumb." In any case, exercise can't hurt. The stronger the heart and lungs are, the better able they will be to help kept those bodies healthy.I wish your daughters many, many years of health and happiness and I hope they never have to see the inside of a hospital.--Katrina, mother of Sean (5) w/cf, Carolyn (3.5) w/o cf, and Allison (1.5) w/o cf