This study was designed to influence of own body resistance training on selected physical fitness variables among school boys. To achieve the purpose of the study 30 school boys were selected from Government Higher Secondary School, Kalveerampalayam. Their age ranged between 15 and 17 years and they were divided into two equal groups consists of 15 each. Group I underwent the Own Body Resistance training and Group II acted as control group. The training was given to the experimental group for 3 days per week for the period of 12 weeks. The control group was not given any sort of training except their routine work. The data were collected from the subjects was statistically analyzed with dependent ‘t’ test to find out significant improvement if any at 0.05 level of confidence. The results speculated that the muscular endurance and flexibility of school boys improved significantly due to the influence of own body resistance training with the limitations.