chapter 1 Introduction -- chapter 2 Geographical, Historical, and Epidemiological Aspects -- chapter 3 Main Factors Associated with Obesity in Various Periods of Growth -- chapter 4 Physical Characteristics of the Obese Child and Adolescent -- chapter 5 Energy Expenditure and Physical Activity -- chapter 6 Evaluation of Functional Status -- chapter 7 Food Intake -- chapter 8 Biochemical Characteristics -- chapter 9 Hormonal Characteristics -- chapter 10 Psychosocial Aspects of Obesity -- chapter 11 Health Problems -- chapter 12 Treatment and Management -- chapter 13 Practical Programs for Weight Management during the Growing Years -- chapter 14 Summary -- chapter 15 General Conclusions and Perspectives.