UndergrounD Fitness and Self Defense - Jacksonville, Florida

Kimberly Megargel

When my granddaughter said she was having her 7th birthday party here, I'll admit I was sure most of the kids wouldn't participate and the party would end up a bust. I'll also admit that I couldn't have been more wrong.
The instructor kept the kids engaged and motivated the entire two hours. The games he played with them were educational and fun but he didn't let any of them win just for the sake of winning. He was encouraging, professional, personable, and the kids had a great time.
If you're looking for something different to do for a child's birthday party, hands down this is one of the best experiences I've ever witnessed.

Almas Khamza

Ever since we arrived to Jacksonville Florida we started looking for martial arts facilities. Underground Fitness and Self Defense with Master Lamasters and Master Williams in it’s management is exactly what we needed, since they really helped us to train solidly and learn a lot of things like work ethics, discipline and overall learning the karate ? by great methodic. Courtesy, modesty, integrity, self-control and perseverance is a solid foundation that they refer to each and every training and they teach each of this concepts throughout the whole journey of their students. Really great place if you want your kids to excel and be really good at karate and all the mentioned things. Mentors are great and it only takes a desire and great work ethics from you. Would have stayed there, but due to family circumstances had to move.
Absolutely Recommend ✊?

Carla L

As a parent, I have always dreamed of finding a space where my son would not only feel recognized but also fully embraced, and still learn the value of discipline. From the very first day, Master Benjamin and Master Williams welcomed us with open arms, creating an atmosphere that feels both supportive and structured.

Not only are they mentors but they're leaders that care about each child’s growth, both inside and outside of the dojo. I’ve seen my son flourish in ways I never expected. I’m so grateful to have found a place where not only will they care about your child, but your family.

They'll bring out your child's full potential, even if your child isn't feeling very confident about themselves. There are a multitude of events held that not only allows your child to socialize with their dojo family, but allows YOUR whole family to participate as well.

You will not go wrong with choosing this establishment to provide a whole body transformation (mental and physical).

Jennifer Grose

Our son loves going here. Both, Master Williams and Master LaMasters are excellent, amazing instructors,. They also offer personal one on one sessions, a fun ninja night night for kids so parents can go out for a “date night”. Highly recommend! A++++++

Hank Hurst

Last Saturday was a day we'll cherish forever - a thrilling experience at Underground Fitness and Self Defense's karate belt testing held at the picturesque Alimacani Park. My son, Trip, and I were immersed in a whirlwind of excitement that included paddle boarding, running, swimming, and, of course, plenty of fun!

From the moment we stepped onto the mats, it was evident that we were in the hands of true masters. Master Ben LaMasters and Master Chris Williams have been an absolute joy to work with over the years. Their dedication, hard work, and passion for martial arts shine through in every aspect of their teaching.
What struck us the most was their unwavering patience and kindness. No question was too small, no technique too difficult. They have an incredible ability to make every student, young or old, feel seen, heard, and valued.

But it's not just about the moves and forms; it's the life lessons they instill that make all the difference. Through martial arts, they have imparted invaluable qualities like discipline, respect, and self-confidence to our son. We've watched Trip grow not only as a martial artist but as a well-rounded and confident individual, and for that, we will be forever grateful.

The belt testing was a fantastic blend of physical challenges and personal growth. Paddle boarding amidst the serene waters, running through the scenic park, and conquering the swimming challenges felt like an adventure straight out of a movie!
To Master Ben and Master Chris: You both have not only taught karate but also infused a spirit of camaraderie among all the students, making Underground Fitness and Self Defense feel like a big family.

We cannot recommend Underground Fitness and Self Defense enough to anyone seeking not just top-notch martial arts training but also an enriching journey of self-discovery. It's the perfect place for families to bond, learn, and grow together.
So, if you're looking for an exceptional experience that goes beyond just physical fitness, join the Underground Fitness and Self Defense family. It's an investment in a lifetime of unforgettable memories and personal growth.

Thank you, Master Ben and Master Chris, for all that you do. You've enriched our lives, and we can't wait for the next chapter of this incredible journey!

Fariza Makhambet

My kids love this place and enjoy attending it. My 3 year old started training when she was 2yo and ever since excited about the classes, my son wants to be a karate teacher in future because he is inspired by his teachers Master Ben and Master Williams. Thanks a lot for your support and true dedication.

Eric M

Underground Fitness has been hands down one of the best things for my family since joining. My 3 year old has something with structure to look forward to with instructors that know exactly how to teach at his level. My 6 year old daughter has made friends and can't wait to come back every time. My wife has been looking for a way to get into shape with feeling intimated. Underground Fitness checks all the boxes, I cannot recommend them enough it is a perfect fit for everyone and Master Lemasters & Master Williams clearly know what they're doing and how to make sure everyone is welcome.

Edith Megargel

Master Lemasters and Master Williams are a great with my kids. They are very passionate about what they do and in turn the kids are very excited to learn from them. My son , 3 , looks forward to his Minja class and I love that fact the he has a structured class in which he has fun, learns about self control, and makes new friends. My daughter ,6, and I have the opportunity to train in the same class. We are not only learning self defense but we get to spend some quality time together.