Mentzer's training courses (books and audio tapes), sold through bodybuilding magazines, were extremely popular, beginning after Mentzer won the 1978 IFBB Mr. Universe contest. This contest gathered a lot of attention, because at it he became the first bodybuilder ever to receive a perfect 300 score from the judges. Some time later, Mentzer attracted more attention when he introduced Dorian Yates to high-intensity training, and put him through his first series of workouts in the early '90s. Yates went on to win the Mr. Olympia six consecutive times, from 1992 to 1997.