Document Type : Research Paper I Open Access I Released under CC BY-NC 4.0 license


1 Associate Professor of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Hakim Sabzevari University, Sabzevar, Iran

2 MSc of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Hakim Sabzevari University, Sabzevar, Iran

3 Professor of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Hakim Sabzevari University, Sabzevar, Iran.


The aim of this study was to compare the effect of an aerobic exercise program with two different volumes on some risk factors of cardiovascular diseases in mentally retarded girls. 24 mentally retarded girls were randomly assigned to three groups: 1) aerobic exercise, 3 sessions per week for 45 minutes, 2) aerobic exercise, 4 sessions per week for 40 minutes, and 3) control. The experimental groups performed aerobic exercises including 10 minutes of warm-up, 30 minutes of walking, running and free games, and 5 minutes of cooling for 8 weeks with the intensity of 65-75% heart rate reserve. Data were analyzed using one-way ANOVA (α<0.05). Results indicated that no significant differences among the three groups in lipid profiles, heart rate, and some body composition variables (fat percentage, BMI, WC) (P>0.05). To improve their cardiovascular endurance, mentally retarded girls can perform 4 sessions a week for 40 minutes, and to decrease WHR, they can apply 3 sessions a week for 45 minutes. Both volumes can be used for weight and VO2max.



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