Mark Sisson

Mark Sisson is an American fitness author and blogger, and a former distance runner, triathlete and Ironman competitor. Sisson finished 4th in the February 1982 Ironman World Championship. He has written several books, including The Primal Blueprint, which incorporates aspects of the Paleolithic diet. The Primal Blueprint is his fifth book. Sisson also blogs at his website, Marks Daily Apple.

Sisson was born in Maine and is the oldest of four siblings. He attended Williams College, where he was a premed candidate and earned a biology degree.

Source: Wikipedia