The purpose of this research was study the effect of three exercising, Isometric on under-skin fat rate in non-athlete boy students. So, among 15 non-athlete volunteer students with ages 20-27 years old, 12 students who were all healthy, without any surgery in chest, abdomen and lap, selected and their fat thickness in these regions were measured by Caliper and then with the use of table of estimating the fat percentage based on age and the amount of underskin fat in above mentioned three regions excerpted from "Sairi", the fat percentage of the group was determine.. We used 99% probability level for All Analysis. After 4 weeks of located exercising in 12 sessions, the 3 above mentioned regions were determined again from the viewpoint of fat thickness and fat percentage. To compare the data acquired in pre-test and post-test, we made use of T-test. This study revealed that localized isometric exercises have been effectual in reducing the fat percentage, and there is a significant difference between average fat percent of subjects of exercises group before and after exercises.
