Obesity results from a chronic imbalance between energy intake and energy expenditure for metabolic purposes and physical activity and tends to increase with advancing age. Childhood obesity has become a serious public health problem in many countries. The incidence of childhoosd obesity among school going children is on the rise. Diseases normally seen in adults because of obesity are now being seen with increasing frequency in children. About 50% of obese children will become obese adults. The prevalence of hypertension, dyslipidaemia, high cholesterol level, type 2 diabetes and non-alcoholic fatty liver disease in children is also increasing parallelly. In the present study data regarding BMI categories revealed that majority of obese respondents from Hisar and Gurgaon city were in Obese Grade-Ι category. Values of all the blood parameters analyzed were within normal range in both obese as well as non-obese group respondents however values of blood parameters of obese respondents were on slightly upper side. Prevention of childhood obesity is vital in order to live a healthy lifestyle. A healthy diet and an active lifestyle should be followed by adolescents to get rid of several lifestyle based health issues.