Jack holds a Master of Science degree in psychology, the study of human behavior, which is the study of motivation. He has tens of thousands of hours of experience as an educator, emphasis on instruction in health and fitness. He received his BJJ blue belt from Roger Machado and his purple and brown belts from Dr. Ernie Tom, and has trained under Freddy Sabbatini and Wander Braga. He won double gold medals as a blue belt in the 2008 Mundials, the World Jiu-Jitsu Championship. At an age when most men have settled into flaccid middle age, Jack maintains a profound dedication to physical excellence. His joy in information is infectious. He is the most fascinating man who has ever lived.
