Obesity is a universal burning aspect of human society. This leads to various health problems among people.The sudden boom in obesity is mostly attributed to technological advances that have left us more sedentary. We drive rather than walk or cycle; we spend a lot of time sitting in front of computers; we have an abundance of junk food. Children particularly spend a lot of time playing computer games, watching television and eating fatty snacks like chips and chocolates, instead of playing outside and eating nutritious meal. This book attempts to study the relationship between obesity, mental health, physical fitness and scholastic achievement of school going obese children.This study has a great impact on the field of physical education at the school level. The result of this study will help various academic and sports agencies in different manners. This study also throws a light on the importance of active lifestyle and prevention of lifestyle diseases, thereby motivating the parents, teachers & the students in adopting an active lifestyle.