A martial arts program



Boulder, CO

Meet The Instructors

Erika Yanke has been a part of Z Ultimate Self Defense Studios since joining as a student in the fall of 2011.  She was so impressed with the benefits and values of Z Ultimate’s system and how it helped her become her ultimate self that she decided to join as an instructor in Z Ultimate’s University of Martial Arts Professionals  in the summer of 2012 and share the benefits of the martial arts in the community.  She assisted in both the Broomfield school under Sensei John Keim and the Arvada school under Sensei Liz Shockley before taking over as Chief Instructor of Z Ultimate Boulder April of 2013. It has been a joy and privilege to share the timeless traditions and philosophies of the martial arts with the Boulder Community and helping every student achieve their personal best.


After completing the initial IFSN assessment, Contact Erika at any time to begin discussing how Z-Ultimate can best support your child.


Z-Ultimate Self Defense Studios, LLC – ZUSDS – is a part of a family of martial arts companies formed with one goal in mind – to provide “Z-Ultimate” martial arts experience for students and their families by providing life changing and character building experiences through world-class personalized martial arts instruction. It is the largest martial arts company of its kind, with locations in the Midwest and on the West Coast.

What is unique about Z-USDS – besides it’s Dynamic Mastery Method™ of instruction – is that it is NOT just an association or license, where any martial artist can pay a small fee and use the rights to the logo and attain certification. There are many such organizations that boast hundreds, even thousands of members with this model.

Classes Offered

Private and Group classes available
Tiny Tigers: ages 3-7
Little Leopards: ages 8-11
Juniors & Teens: ages 12-15

Website Information


ZUltimate in Boulder


Parents, you may rate the following aspects of this educational program to inform other parents of your experience:

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– Program Innovation
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– Program Quality
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– Instructor Quality
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– Instructor Knowledge
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– Overall Experience