Book excerpt: All parents want their children to be healthy, fit, and more active, but there is a pervasive myth that keeps many kids from reaching their full potential. A popular misconception is that young athletes shouldn’t engage in strength training because it is harmful. However, current research, including a recent study from the Mayo Clinic, indicates that nothing could be further from the truth. Strength training is the single most effective exercise method for reversing adolescent obesity and can dramatically alter and improve a child's body composition. With his blockbuster book The Slow BurnTM Fitness Revolution , renowned personal trainer Fredrick Hahn revealed the secret to strengthening muscles, enhancing flexibility, burning fat and improving performance in just 30 minutes a week. Now, in Strong Kids, Healthy Kids, he shows parents, caregivers, teachers, and doctors how his fitness program can change the lives of children and teens everywhere, no matter what their athletic ability. Whether a child is inactive or a competitive athlete looking to take his performance to the next level, he can become much stronger and fitter. As the founder of the Mighty Tykes and TeensTM program, Hahn is an expert on child fitness. Here, he shows kids how to: get strong fast • increase bone density and resistance to injury • improve cardiovascular health • enhance flexibility • increase their metabolism and reduce body fat With this proven program, all children can build their self-esteem, improve their performance, and lead healthier lives.