Aim&Objective: To find out the effect of gyming on of body fat percentage, body mass index and waist circumference among regular gym goers. Method: The regular new member list was obtained from the branch. On the basis of the list the first fitness test had been done and the values of their Body Mass Index, Body Fat Percentage and their Waist Circumference. Then after 6weeks from the date of first fitness test again their body mass index, body fat percentage and waist circumference was measured .The two values were compared and concluded. Outcome Measures: Body Mass Index- in kg/m2 Body Fat - in percentage(%), Waist Circumference- in Cms. Result: The statistical analysis was done using paired t test and the calculated p value is significant for the pretest and post test values of BMI and waist circumference whereas the p value is not significant for the pretest and post test values of body fat percentage. Conclusion: This study concludes that there is significant reduction in the body mass index and waist circumference after 6 weeks of regular gyming. But there is no significant change in the body fat percentage values.