Michael McCastle is an American endurance athlete, performance coach and philanthropist. He is the current world record holder for the number of pull-ups completed in 24 hours (5,804) while wearing a 30 lb pack. He is the founder of the Twelve Labors Project, a philanthropic organization in which McCastle performs feats of strength and endurance to raise awareness for causes. McCastle is also an air traffic controller and a former petty officer in the United States Navy.
