3x Mr. Olympia One of the most well-known bodybuilders who have ever lived is Frank Zane. Even at his challenging age of 81, Zane makes care to exercise frequently and eat healthfully all year long. He leads an active and healthy lifestyle, which has helped him stay healthy thus far. In addition to being a great bodybuilder, Zane has written multiple books about the best diet and training regimens in which he extensively discussed his approach to fitness and bodybuilding.