Cary has always had a passion for football. He got his start working with athletes when in 1979, Los Angeles Rams running back Wendell Tyler asked Cary to train him using martial arts techniques. He was asked again in 1993 by pro football players Marcus Allen and Sean Jones to help them increase their athleticism. In each case, the athletes were able to achieve higher performance with less energy expenditure. Their increased flexibility led to greater quickness, speed and reaction time. Cary realized then that his training techniques could enhance the performance of professional athletes on a much grander scale. However, a demanding film career kept him from establishing his ninjah training for athletes. Now on hiatus from film, Cary has turned his full attention to working with athletes.