Anthony Sawyer Horton Jr., professionally known as Tony Horton is an American personal trainer, author and former actor. He became obsessed with fitness and training during his days in University of Rhode Island, when he enrolled himself for weightlifting classes. After graduation, he moved to southern California and started training an official from 20th Century Fox. Eventually his clientele started growing and later included personalities like Bruce Springsteen, Usher and Annie Lennox. Horton has appeared in a number of commercials like the Thighmaster and fitness videos including Power 90. P90X or Power 90 Extreme, a home exercise regimen, was his breakout hit that made him popular throughout the world. He later released their sequels P90X2 and P90X3. He is often seen wearing gym clothes that comprise high functioning tank tops and shorts for it allows maximum movement without many constrictions. He still continues to train people and is known for being at the zenith of fitness.