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About The Gym

Professor Robert Mrotek founded Inner Strength Martial Arts In October of 2009. Prior to opening Inner Strength Martial Arts, Professor Mrotek was the President of the Martial Arts club at the University of Wisconsin-Superior. He and a small group of students trained in a small room engaging in full-on grappling and kickboxing. These students urged Coach Mrotek to open a gym, starting the family that is Inner Strength Martial Arts. ​

Inner Strength Martial Arts is a proud affiliate of Professor Chewy Ybarra of Ybarra Jiu-Jitsu out of Modesto California for Brazilian Jiu-Jitsu and Mixed Martial Arts. Chewy Ybarra is a 4th Degree Black Belt in Brazilian Jiu-Jitsu under Master Cleber Luciano, the same Master that Professor Robert Mrotek received his Brazilian Jiu-Jitsu Black Belt from in 2016. Check back for more information on upcoming seminars as Chewy Ybarra comes to Superior Wisconsin 4 times a year to host seminars

Inner Strength Martial Arts is now a proud affiliate of Lorenzi's Boxing! This is the first time a boxing class has been in Superior, WI in over 50 years!

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