Welcome to Warrior Fitness!

I have been involved in martial arts training, in one form or another, for over 30 years.   Specifically, I have been training in the Budō Taijutsu arts of the Bujinkan for more than 22 years and am currently ranked as a Kudan (9th degree black belt) under Jack Hoban Shidōshi.

My passion for fitness grew naturally out of my love for budo (martial arts).  I grew up on Bruce Lee movies and Saturday morning Kung Fu, for those of you old enough to remember!  When I read my first Bruce Lee book,Tao of Jeet Kune Do, I began to see the parallels between martial arts and fitness and how Bruce used all types of conditioning methods to augment his performance in martial arts.  This grabbed my attention!  If the greatest martial artist in the world (at the time) was adapting fitness methodologies to make him better, stronger, faster, maybe there was something to this.


The idea for Warrior Fitness, as it exists today, began over 10 years ago while I was working as a business consultant in the financial services industry.  The job involved about 80% travel and we usually worked 10-12 hour days, long after the client had left for the day.  Since most of the work involved sitting in front of a computer, or in meetings, for long stretches at a time and eating out on a daily basis, I began to put on a little weight and develop low back and neck pain (Read – How I Healed My Neck Pain with Mobility and Breathing) I realized that I needed to do something to help compensate for the periods of inactivity, but long workouts simply did not lend themselves to such crazy work hours.  I began to formulate brief, yet intense workouts in my hotel room using just my bodyweight and usually a chair or two.  After discovering kettlebells, I usually brought one along in the trunk of my car as long as the client was in driving distance.  Daily joint mobility work helped to keep all my joints lubricated and using yoga asana (postures) after workouts, or as a low intensity workout of their own, helped to abate muscle soreness and compensate for the training, as well as for the hours of inactivity at work.

In 2004, I became certified as a Circular Strength Training Coach under Scott Sonnon.  I left the organization in 2006 as my certification expired to walk my own path and work to create Warrior Fitness Training Systems.

As my ideas gradually formulated, and the resulting benefits increased, I began to share my fitness and conditioning discoveries with friends, co-workers, family, and students.  My knowledge and experienced deepened as I read books and articles on sports science, experimented with fitness protocols, and applied these on both self and others.  My book, Warrior Fitness: Conditioning for Martial Arts, was published in 2008 as the culmination of my experiences at the time.

In 2011, looking to once again broaden my knowledge and experience in strength & conditioning, I became certified as an Underground Strength Coach under Zach Even-Esh.  You can read about my first Underground Strength Coach Certification HERE.

Jon specializes in helping people all over the world burn fat, build lean functional muscle, and live stronger, healthier lives!

Hope to see you on the mat soon!

Results Matter!

Jon Haas

  • Founder, Warrior Fitness Training Systems
  • Certified Underground Strength Coach – Level 2
  • ACE and FMS Certified Personal Trainer
  • Bujinkan 9th dan Shidoshi
  • Certified Conflict Resolution Specialist
  • Certified VX Sport Coach
  • Head Strength & Conditioning Coach for VX USA


  • David C. Furukawa

    February 17, 2010

    Hi Jon,
    Nicely done.I was wondering when volume 2 will be published or are you planning on the next one anytime soon?Best of luck with your latest venture.Take care!

  • Matt Jennings

    April 22, 2010

    Hey Jon,
    Great job with your blog.
    Writing style is easy going…prose but not boring.
    Useful information.
    I will frequent your blog.
    Great success for WARRIOR FITNESS.

    Matt Jennings

  • Jon

    April 22, 2010

    Thanks Matt – appreciate your feedback!