Intermittent fasting, a vegetarian diet, intense weight training, and walking three to six miles a day might sound like a regimen a fitness instructor might assign you today. This was the routine of the man and myth Bernarr Macfadden in the late 19th and early 20th century. Read on to learn the story of a bodybuilder, health aficionado, magazine magnate, former circus performer, and the founder of the Polar Bear Club.