Dr. Michael Yessis received his Ph.D. from the University of Southern California and his B.S. and M.S. from City University of New York. He is president of Sports Training, Inc., a diverse sports and fitness company. Dr. Yessis is also Professor Emeritus at California State University, Fullerton, where he was a multi-sports specialist in biomechanics (technique analysis) and sports conditioning and training.

Dr. Yessis has served as training and technique consultant to several Olympic and professional sports teams, including the L.A. Rams and L.A. Raiders football clubs, Natadore Diving Team, and the U.S. Men's Volleyball Team. He has also trained hundreds of athletes in different sports and developed unique specialized training programs for strength and speed-strength i.e. explosive strength, terms he's coined.

During his fifty plus years of working with athletes, and as president of Sports Training Inc, Dr. Yessis developed what has come to be known as the "Yessis System" for improving running speed. His three-step method has been successfully used to improve athletes in football, soccer, baseball, basketball, track and other sports.  Most notable is the improvement in sports technique. 

Dr. Yessis is considered this country's foremost expert on sports technique. In the Jan 2011 issue of Muscle & Fitness, Dr. Yessis is referred to as "the legendary biomechanist". Dr. Yessis has written 16 books in the sports and fitness field including Kinesiology of Exercise, Build A Better Athlete, and Sports: Is It All B.S.? He has also written more than 2,000 articles on fitness and sports training that have appeared in magazines such as Muscle & Fitness, Shape, Scholastic Coach, Fitness Management, National Strength and Conditioning Association Journal and Track and Field Coaches Review.

In addition, he completed four renowned DVDs;  Exercise Mastery, Specialized Strength and Explosive Exercises for the Quarterback, Specialized Strength and Explosive Exercises for Baseball and Specialized Strength and Explosive Exercises for Softball, as well as the audiobooks Explosive Tennis: The Forehand, and Explosive Tennis: The Backhand. Dr. Yessis presently serves on the advisory board and is a clinical advisor for the American Running Association. He is also a contributor to Football Gridiron and Running Times magazines.