Mike Mentzer (November 15, 1951 – June 10, 2001) was an American IFBB professional bodybuilder, businessman and author.
Mike Mentzer was born on November 15, 1951 in Ephrata, Pennsylvania and grew up there. In grammar school and Ephrata High School, he received "all A's", He credits his 12th grade teacher, Elizabeth Schaub, for his love "of language, thought, and writing." In 1975, he started attending the University of Maryland as a pre-med student where his hours away from the gym were spent in the study of "genetics, physical chemistry, and organic chemistry." After three years he left the university. He said his ultimate goal during that period was to become a psychiatrist.
Mentzer started bodybuilding when he was 12 years of age at a body weight of 95 lb (43 kg) after seeing the men on the covers of several muscle magazines. His father had bought him set of weights and an instruction booklet. The booklet suggested that he train no more than three days a week, so Mike did just that. By age 15, his body weight had reached 165 lb (75 kg), at which Mike could bench press 370 lb (170 kg). Mike's goal at the time was to look like his bodybuilding hero, Bill Pearl. After graduating high school, Mentzer served four years in the United States Air Force. It was during this time he started working out over three hours a day, six days a week.