Our Programs

Adult Martial Arts

Youth Martial Arts

Women's Self Defense

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Modern Martial Arts - MMA - Brazilian Jiu Jitsu - Self Defense
Personal Training - Cross Training/TRX Classes
Located in Downtown Boulder - Locally owned and operated
Video by Metroseen.com


Welcome to Define Defense Martial Arts & Personal Training!

Define Defense is conveniently located in downtown Boulder, Colorado. We offer many different programs but all of our martial arts and self defense programs are based on realism and effectiveness. Define Defense takes a modern approach to martial arts as it combines all the most useful techniques of different styles into our curricula. Whether you are looking to learn skills and get in shape or you are looking to compete, Define Defense is the place for you!

The second main focus for us is physical fitness. That is why Define Defense uses all the latest cutting edge equipment in the classes so our clients enjoy a great workout every time they come. We are proud to offer TRX / Cross Training classes as well for anyone that wants to improve their fitness or wants to combine it with their martial arts training.

When you train at Define Defense, you don’t just join a gym but you join a community with a great atmosphere. Your instructors and team mates will push you to work hard, learn fast and help you whenever they can. It is our priority to provide you with a fun, safe and professional environment to train in. Everyone in our team develops strong bonds of friendship and can’t wait to come back and train!

Why Do So Many People Love to Train at Define Defense?

Safe: Our priority is to keep you safe in the real world from dangerous situations and during training from injuries

Realistic Self Defense: Our program is unique and highly effective since it teaches the most practical self defense techniques

MMA: Train Mixed Martial Arts to get in shape and to have fun or to compete

Fitness: You are guaranteed to improve your physique during our fun but intensive classes

Individual Attention: We pay a lot of attention to your individual needs, limitations and goals during your training

Brazilian Jiu Jitsu: We combine many different elements from several grappling styles into our program which makes you a better grappler

Experience: Your instructors have been doing martial arts for over 26 years combined

Cutting Edge: We use proven traditional and alternative fitness equipment to give you a diverse workout so you reach your goals

TRX / Cross Training: You will be taught by a certified TRX Suspension Band instructor and will combine this workout with cross training

Details: We pay attention to details, hygiene and your comfort. Just check out our facility and you will see what we mean.

Parking: Define Defense validates parking for all clients

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