What is the BMI? How much should I be eating? Do I really need to exercise? Find the answers to these questions and other food, body, and health questions in this guide to understanding the fundamentals of good nutrition and its partner for optimum health--physical activity. Healthy eating can be a habit--and good habits started earlier in life are easier to maintain. Good nutrition and physical activity complement each other in weight loss, cardiovascular health and other benefits. This book provides the advice you need on how to get the most out of what you eat and how to develop healthier habits that will help keep you fit for a lifetime.