Introduction: In different research the role and effect of exercises on Ghrelin has been studied. Some of these research demonstrated that exercise may lead to decreases of Ghrelin and these ones did not. On the other hands, the results of some studies showed that acute exercise with moderate to high intensity may lead to temporary suppression of appetite.Although, mechanisms of temporary suppression of appetite due to acute exercise are not well known, but some studies refer to changes of appetite-related hormones.
Methodology: This quasi-experimental research, did on obese women (age 25-35 years old) that just performing regular activities without any exercises. 24 obese women with body mass index greater that 30 kg.m2 volunteered to participate in this study and then divided randomly into two equal groups of control (regular life) and experimental (aerobic exercise). Aerobic exercise performed for eight weeks, three sessions per week and 45 min duration per session consist of 15 min warm up and 30 min interval running with intensity of 65-75 percent of maximum heart rate. Before and after eight weeks of aerobic exercise to evaluation of appetite index VAS questionnaire was used. To evaluation of biochemical variables, following 10 hours fasting, blood samples were collected from all participants, before and after intervention. Data were analyzed using independent t-test. The level of significance was set at P<0.05.
Results: The results of the present study showed that following eight weeks of aerobic exercise, there was no significant difference between Ghrelin values of control and experimental groups. Also, there was no significant difference between appetite index of control and experimental groups (p>0.05).
Discussion: Based on finding of this study eight weeks of aerobic exercise with moderate intensity did not change the ghrelin values and appetite index. On the other hands, the changes of ghrelin and appetite index at resting state are same.