Imagine picking up the morning paper and seeing a banner headline that reads: miraculous new anti-aging pill discovered. In The Fitness Factor, Lisa Callahan, M.D., shows us that such a magic pill already exists in the form of regular daily exercise. As cofounder and medical director for the country's premier sports medicine center for women and a well-known medical spokeswoman, Dr. Callahan is uniquely qualified to write this book. She has treated thousands of patients-from housewives to professional athletes-and has helped them change their lives forever by instilling in them the knowledge that an essential connection exists between fitness and health. She speaks honestly and intelligently to women, helping them understand that the benefits of regular exercise go well beyond the cosmetic.