This book is about a study that investigated the glycaemic profile, the level of physical activity and the anthropometric profile of male and female high school students at a federal public school, looking for an association between these three variables and the impact of these factors on the health of these young people. An easy-to-read book that covers concepts that are important for understanding the subject studied, clear methods that contribute to the interpretation of the study and the reproducibility of the research, and qualitative and quantitative data that are important for understanding the issues addressed.