Methods: modified sit-ups test was conducted on 1050 boys ranging between 14 to 16 years. Random sampling technique was used to select the subjects. To find out the significance differences among the different three age groups of school boys, Analysis of Variance (ANOVA) was applied. Further Scheffe’s post-hoc test was used to see the direction and significance of differences where ‘F’ ratio was found significant. The level of significance chosen was .05.

Results: There were significant differences obtained on abdominal muscular strength and endurance (Modified sit-ups), among different three age groups of rural school boys. The finding reveals that 16year age group of rural school boys demonstrated significantly better than their counterparts.