Define Defense Martial Arts & Private Training is Boulder, Colorado’s premier place for modern martial arts, self defense and personal training. We are not the typical martial arts school as we incorporate personal training and fitness into our classes. 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.

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 never do the same warmup twice and teach you how to perform exercises correctly. Since our instructors are certified trainers, you are guaranteed not only to get a great workout but also learn more about the reasons behind the training. That is why Define Defense is the place where martial arts and personal training meet!

Our clients enjoy a blend of fight/self defense instruction and physical training. Define Defense has a fully equipped 2,400 square feet gym which includes over 1,000 square feet of martial arts mats and cutting edge gym equipment. We are also pleased to provide our clients with 2 spacious brand new locker rooms and showers.


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