The present study was conducted to compare function of some muscles of shoulder: biceps, deltoid, pectorals major and triceps) in pull - up, push - up and modified pull - up tests. Subjects included fourteen 12 year old healthy boys, with average height of 148±3.23 cm and weight of 39.23±2.4 kg with maximum of a 6 month-athletic period.
Function of each muscle in shoulder (biceps, deltoid, pectorals major and triceps) was recorded by lead and electrical current circuit during the test. Statistical analysis using SPSS. PC was performed. ANOVA was employed to test the differences (P<0.05).
In of pull-up in standing position, biceps and triceps obtained maximum rate of activity muscles. Also, pectorals major and deltoid muscles in push - up were more active than the other muscles. It was concluded that pull - up and push up have similar effects on the activity of the above muscles.
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