مشخصات پژوهش

Gherlin is an appetizing peptide hormone in the stomach and affects energy balances, weight, and body composition. Weight gain and increase in serum estrogens, especially β-Estradiol, on the other hand, raises the risk of breast cancer in obese women. Therefore, the present study attempts to investigate the effects of water aerobic exercises on the levels of β-Estradiol and ghrelin in blood plasma and body composition of obese non-athlete women. Through a public call, 40 obese women were selected via the convenient sampling. The subjects were put into two experimental and control groups via simple random sampling. 24 hours before the exercise program began, the first stage of 10 cc blood sampling was conducted from the left arm venous while the subjects were fasting. The experimental group went through a 12-week water aerobics exercising program with three sessions per week while the control group went on living without any specific change in their lifestyle and physical activities. The data collected from the blood sample analysis were analyzed through dependent ‘t’ and covariance analysis tests using SPSS 21 computer application. The results revealed that water aerobic exercises significantly affect the level of ghrelin in obese nonathlete women. Yet, the study failed to see a significant change in the level of β-Estradiol, BMI, the net mass and fat percentage. The study demonstrated that, in case water aerobic exercises are obligatory in order to change and influence the level of β-Estradiol 17 hormones and the body composition of obese women, the severity of the exercises should be over 70% (VO2max) with sessions longer than one hour.