TESTIMONIALS

Destiny Hering

Inner Strength Martial Arts is a great program to be apart of no matter what age. Everyone there is respectful and strives for you to succeed. The Professor of the gym sticks true to his values and morals and ensures you have a great and hard working environment.

David Wheeler

I've been training here for a few months now and I love everything about it. It is a fun and inviting atmosphere, the coaches love to teach. The level of teaching goes above and beyond, my favorite place to blow off some steam after a workday!

clara gunderson

great place to train. started training kickboxing and jiu jitsu at inner strength in august of 2024 and have loved it ever since then. everyone is very welcoming and kind. the coaches are amazing and teach great techniques everyday. they are also just great people and good examples of what to look up to. they are truly an inspiration to me and many other people!! i 100% recommend training at inner strength.

Joshua Dean

Inner Strength Martial Arts is both a family friendly place for kids to learn and train as well as a place for adults to come together and learn skills in Jiu Jitsu and Karate under the capable care of Professor Mrotek. My son chose karate and jiu jitsu while his brother chose boxing, which occurs at the same time downstairs. Cleanliness, respect, encouragement, good sportsmanship and excellent martial arts skills are all part of the program at ISMA. I am extremehly happy with the choice to select this place of learning for my children. I have enjoyed watching the kids train so much, I am going to start training there myself!

Carisa Kinley

Amazing place! My son is very active and this place has brought him discipline and a great workout that will give him skills to protect himself and his family for the rest of his life ❤️🙏🙌💪

Donna Jones

Robert is a top notch, good hearted guy and his classes are so fun and a good workout.
If you’re looking for a fun way to get in shape, this is it.

Here And Now

This is a great place for youth to learn and grow. My kids really like going, and Robert is Fantastic with children. The adult classes look exciting and the atmosphere is positive I really liked my experience there!

Misty Chillman

Great place to train and very welcoming environment! No judgement from staff or current members just come as you are and join right in! I felt welcomed and respected and it is for any level of fitness that you are at. The owner Robert is also very understanding and supportive and flexible which is hard to find now a days when it comes to businesses! Would highly recommend this gym!

Aiden Doolittle

I’ve been going to inner strength martial arts on and off for 12 years since I was just a kid. Professor Mrotek has also been a remodel to me. Inner strength is much more than just a gym but a family. I’d recommend this gym if you are interested in martial arts, like to have fun, be surrounded by encouragement and humor, and being taught by the best around.

Allison Lee

I recently have been welcomed into the family at inner strength martial arts and I have nothing but positives to say about my experience thus far! They’ve taken the initiative to work with me and provide more one on one training during my classes to ensure I’m reaching my goals and feel more confident in myself. The staff there is incredibly welcoming and kind, I have already began to form bonds with the other students and instructors.
If you’re considering joining a gym where you go to have fun and learn some kick butt moves, I’d highly recommend them!

Ken Stanley

5 Stars is not enough for this place! I started training 2 years ago and I was 52 let me tell you Wow! In my time at ISMAA I have gone from knowing no one to being a member of a family! 210lbs to 185 lbs. Not being able to hit the heavy bags for more then 30 seconds to fighting my first Amateur MMA fight soon. Obviously you get out what you put in BUT IF you don't quit on you the Professors and coaches won't quit on you either! ISMAA has changed my outlook on what I can and can't do! Tell Professor Mrotek Ken sent you and get a free lesson, you won't regret it, you will be thanking me!

Matthew Stanger

I came to this gym last year at the end of May at 260lbs trying to do a jiu jitsu tournament that July. I ended up not only doing the tournament an fighting as well, I found an amazing place for people of all ages to come an train. I’ve had nothing but an amazing experience since the day I came in. Everyone there is amazing and very welcoming an respectful. I would highly recommend this gym to everyone even family’s with kids.

Elena Michelle Surface

My son takes Karate there and classes really are changing his whole life for better! He is becoming more focused, more disciplined and confident. I'm very proud of him being a student at Inner Strength.

Jason Anderson

The culture at Inner Strength Martial Arts is second to none. Rob, Nick and Sarah are an incredible team and have established an environment friendly to all that go there to train. Anyone thinking about joining should really come and check it out, you won’t be disappointed.

Heather Lahti

I have searched the Duluth area for about 6 months now to continue Muay Thai kickboxing and I am so happy I've found Inner Strength! Everyone I have met is very welcoming and respectful. Theres a variety of classes and they encourage you to step out of your comfort zone to try something new - this would definitely be the group to do that with, no matter your experience level.