Sara Kooperman started a small gym in Chicago. The gym didn't work out financially but it spawned SCW Fitness Education, which, 20+ years later, is one of the nation's largest fitness instructor training companies. If you're a fitness professional, SCW can help you stay on the cutting edge of your field. The company offers specialty certificates (e.g., Pilates, Aquatics) and has produced hundreds of training DVDs for fitness instructors.