Background: Omentin-1 is recognized as new Adipokine that mostly is excreted from visceral fatty tissue. Circulating levels of Omentin-1 are inversely associated with obesity. The aim of the present study on two training methods of endurance and resistance on Omentin-1 levels of plasma and factors related to obesity and overweight in obese girls, respectively.

Methods: Thirty four obese and overweight girls (BMI>25) were chosen purposefully then they were categorized at random to three endurance group (n=12), resistance group (n=12) and control (n=10). A total of 8 weeks of endurance and resistance training and endurance training was 4 times a week with 65 to 80 percent of HRmax and intensity resistance training was 65-80% of 1RM. Phlebotomizing was done at various stages with similar conditions and plasma Omentin-1 levels by ELISA method was measured. Data were analyzed by Kolmogorov-Smirnov and related t tests for studying the changes within the ANOVA and LSD post Hoc test for comparison between groups at the significance level of p<0.05.

Results: The results showed a significant increase Omentin-1 in both the experimental group (p _endurance =0.001, p _resistance =0.004) and reduce factors associated with obesity such as weight (p _endurance =0.003, p _resistance =0.005), fat mass body (p _endurance =0.001, p _resistance =0.001), BMI (p _endurance =0.002, p _resistance =0.004) and WHR (p _endurance =0.011, p _resistance =0.013) in both experimental groups after 8 weeks of training (p<0.05).

Conclusion: It can be stated that both endurance and resistance practices after 8 weeks of training, to improve factors related to obesity, maximal oxygen uptake and increased plasma levels Omentin-1 was.