"We do not stop exercising because we grow old - we grow old because we stop exercising."
- Kenneth Cooper, a physician, author and creator of aerobics. The former Air Force Colonel authored the 1968 book "Aerobics," and the popular, "The New Aerobics," a few years later. Over 30 million copies of his 18 published books have been sold and have been translated into 41 languages. (1931- )