<P>FEV1, 31% the last time I checked. FVC 95-100%. Trying to maintain. Neb. Tobi, Cayston + usual other neb products + exercise 3 times a wk.. Yes I use O2 when on treadmill, doing 16 min. mile for 2miles, grade of 4.</P>
<P>My resting sat is 98%, room air, when on the treadmill without O2 it drops to 87</P>
<P>with O2 and exercise only drops to 92-93>. Dr. wants me to keep sat above 90. </P>
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<P>Did sleep study to see if I need O2 while sleeping, it came back normal.</P>