LEP and cystic fibrosis: Table 2 shows that these two subgroups (active and sedentary) significantly differed for both FEV1% decrease/year and FEV1% decrease. In the active group, triglyceride levels were significantly lower than in the sedentary group. Serum adiponectin levels were significantly lower in active versus sedentary CF patients, respectively. On the contrary, leptin levels are slightly decreased in sedentary CF patients vs. active patients, although the difference is not significant.