ABSTRACT rnBackground: Diabetes mellitus and its complications continue to be one of the highestrncauses of morbidity and premature mortality in recent times. Aerobic exercise is part ofrnlifestyle modification that leads to positive health in general and advised to be usedrnconsistently in the management of diabetes mellitus in particular. In this connection, exercisernis underutilized in the management of type 2 diabetes mellitus in Ethiopia. Management ofrndiabetes needs continuous monitoring of hemoglobin A1c which indicates how effectivernglycemic control over a period of 2-3 months is.rnrnObjective: This study was intended to assess the effects of supervised aerobic exercise onrnglycemic control and body composition in type -2 diabetes patients attending outpatient care rnunit in Goba Referral Hospital, Ethiopia, 2020. rnMethods: Thirty physically active adult men, 35-65 years of age with type 2 diabetesrnmellitus living in Goba town were assigned to 12 weeks of supervised aerobic exercise. Thernsubjects were selected using convenient sampling technique. Fasting blood glucose,rnHemoglobin A1c, Body mass index, Blood Pressure and Waist to hip ratio were used as thernmain outcome variables. Epi-data (3.1 version) and SPSS (21 version) were used for datarnentry and statistical analysis, respectively. The paired sample T-test was used to test if therernwas a significant change in parameters. rnResults: The mean age was 52.89 years, with response rate of 90%. Mean hemoglobin A1crnlevel at twelfth week decreased significantly from baseline (8.7% vs 7.6 % with 12.64%rndecrease, p =0.013). The interventional exercise reduced body weight (1.54%), body massrnindex (1.55%) and waist to hip ratio (1.98%) significantly (p 0.05). rnConclusion: A 12 weeks of moderate intensity aerobic exercise improved hemoglobinA1c,rnbody weight, body mass index, Waist circumference and waist to hip ratio significantly, butrnthe reduction in the blood pressure and fasting blood glucose were not statisticallyrnsignificant. So, health professionals should recognize and prescribe individualized exercise.