Author: Jon Haas

Jon Haas is a certified Underground Strength Coach – Level 2, as well as an ACE and FMS certified Personal Trainer. He has been involved in the martial arts for over thirty years. He has been training in the Budo Taijutsu warrior arts of the Bujinkan for more than 25 years and is currently ranked as a Kudan (ninth degree black belt) under Jack Hoban Shidoshi. Since 2009, he has been studying Aiki and internal power training with Dan Harden, as well as training in Yiquan, an internal Chinese martial art. Jon is the founder of Warrior Fitness Training Systems and author of the book, Warrior Fitness: Conditioning for Martial Arts, as well as numerous other online training programs.

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