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UndergrounD Fitness and Self Defense
5 ★★★★★ 46 Google reviews · Karate dojo in Jacksonville, Florida
Affiliated dojo — reviews and the dojo's own info point to a recognized Karate style organization or franchise (think Shotokan/JKA, Kyokushin, Goju-Ryu, Isshinryu, Tiger Schulmann's or Villari's). If lineage matters to you, ask which style and organization the dojo belongs to, and under whom the head sensei earned their black belt.
Plan your first class
- Free trial / intro class most dojos welcome new students with a free trial or intro class — check their site or give them a call to book your first session
- Kids & youth classes kids and youth Karate classes (ages 3–13) — built around discipline, focus, and confidence
- Private lessons private, one-on-one instruction available — a focused way to start or to work around a busy schedule; ask about availability and rates
- Today see hours ·
- Website & schedule underground-training.com — book classes and see the live schedule
- Phone (904) 704-7888
Hours
| Monday | 12–8 PM |
| Tuesday | 12–8 PM |
| Wednesday | 12–8 PM |
| Thursday | 12–8 PM |
| Friday | 12–4 PM |
| Saturday | 9:30 AM–12:30 PM |
| Sunday | Closed |
The classes they run
“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.”
“They also offer personal one on one sessions, a fun ninja night night for kids so parents can go out for a “date night”.”
“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.”
Other martial arts here
“Our style is tae kwon do, but we also do boxing, kung fu forms, weapons.”
“I did BJJ here also, but coach Cliff has his own dojo now.”
“Our style is tae kwon do, but we also do boxing, kung fu forms, weapons.”
“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.”
What students say
“Master LaMasters is an excellent and very patient teacher explaining moves so that anyone can understand them.”
“From the very first day, Master Benjamin and Master Williams welcomed us with open arms, creating an atmosphere that feels both supportive and structured.”
“I wanted him to learn self defense and some form of martial arts to build his confidence despite his challenges.”
“They'll bring out your child's full potential, even if your child isn't feeling very confident about themselves.”
“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 reviews
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.
My daughter has been going for almost a year now, since she was 5 years old. She has learned so much and we appreciate Master LaMaster’s and Master William’s patience and support with our busy little girl. She loves parent night out and is super excited for camp!
We love being a part of the judo family at underground!! Awesome and fun times growing and learning too!! Definitely awesome experience!! The instructors are friendly nice and amazing!! We love it!!
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!
Your first Karate class at UndergrounD Fitness and Self Defense
Nervous about walking into a Karate dojo for the first time? Almost everyone is, and a good sensei expects beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling basic stances, blocks, punches, and kicks — not hard sparring. Step to the side whenever you need to; no one will bat an eye. What to wear: athletic wear you can move in (or a gi if you have one); you'll train barefoot. What to bring: water, and a mouthguard if you have one — many dojos lend a loaner gi for a first class, so it's worth asking when you call. As you keep training you'll add your own gi and the belt your dojo awards you. Kumite (sparring) eases in gradually, once your fundamentals are solid. Arrive 10–15 minutes early to sign a waiver and meet the sensei. It gets easier fast — most people feel far more at home by their third class.
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