Introduction: Measures of abdominal obesity are better than BMI as predictors of CVD risk, although combining BMI with these measures may improve their discriminatory capability.

Aim & Objective: The aim of the study was to evaluate and compare the fitness in relation to Body Mass Index of school going children.

Method: 100 primary school going children aged 8 – 10 years of Burdwan and Birbhum districts of West Bengal, India has been tested on physical fitness parameters namely speed (50 mt. dash) and muscular strength endurance (bent knee sit ups) and Body Mass Index (Weight in Kg./Height in Mt.2).

Result and Discussion: Findings of descriptive data of primary school going children of BMI (low, middle and high) on speed and abdominal strength and endurance components of physical fitness indicated that very lesser difference exists among different BMI children of school on various components of physical fitness and performance of the subjects on various components shows more improvement with middle BMI and less with Low and high BMI. There was no significant difference found among three BMI categories.