This book employed a descriptive cross-sectional survey. It focused mainly on the secondary school students' knowledge, use of physical exercises or physical activities as a preventive and health promotion means. The study is designed to fill the gap in knowledge relating to in-school adolescents' knowledge about the therapeutic benefits of PE and their pattern of participation in PE. The book aimed at promoting young persons' participation in Physical Exercises or Physical Activities for the purpose of health promotion, prevention of chronic diseases such as Childhood Obesity, Type 2 Diabetics and debilitating Cardiovascular Diseases.