Fitness is now forever linked with Fonda, who released the first of her more than 20 videos in 1982, helping to fuel the country’s interest in aerobics. But she originally rejected the idea of making ...

Billy Blanks invented Tae Bo in the '70s, and his devotion to the cardio fitness workout is still going strong. The fitness technique, which combines stances, kicks, and punches with choreography, ...