Adipocytes‐secreted hormone leptin, lipid profile and aerobic exercise program

Abstract

The adipocyteâ€derived hormones leptin is known to increase in obesity and related disease. Thirty two nonâ€trained males (39±4.32 years, 176.5 – 6.5 ± 6.42 cm, and 31 ± 3.14 body fat %) were matched according to physical fitness enrolled in this study and divided to exercise and control group by accidentally. The participants of exercise group were completed an aerobic exercise program for 3 months (3 days/weekly) and control group were barred of exercise in this period. Anthropometrical measurements and fasting blood samples were obtained before and after interventions in two groups. Blood samples were collected in order to measuring serum leptin, triglyceride (TG), high density lipoprotein cholesterol (HDL), and Low density lipoprotein cholesterol (LDL). Pre†and post exercise independent variables were compared using a pairedâ€samples tâ€test. Compared to preâ€training, the leptin levels decreased significantly (P<0.01) after aerobic exercise program in exercise group but not in the control subjects. Triglyceride concentration was decreased with exercise training whereas concentrations of LDL cholesterol did not change in exercise group (p≥0.05). Exercise training resulted in significant decrease in anthropometrical indexes (p Ë‚ 0.05) and a borderline significant increase in HDL (p=0.052). TG/HDL ratio were significantly decreased in exercise group by exercise training (p=0.028). All variable in control group remained no change in control group (p ≥ 0.05). These data suggest, despite lack significant changes in some lipid profile markers, aerobic exercise program can be improve systemic inflammation and TG/HDL ratio as a cardiovascular risk factor in obese subjects.