"Ken Leistner is an American strength training writer, personal trainer, strength consultant for the National Football League, and chiropractor. He is often known as \"Dr. Ken\".In 1992 Leistner founded the Iron Island Gym with Ralph Raiola on Long Island.[1] The Iron Island Gym was directed by the bodybuilding and powerlifting traditions. Leistner sold his share of the gym in 1998."@en . "Leistner, Ken"@en . . "Ken Leistner"@en . "American personal trainer" . . . . . "Dr. Ken"@en .