Home › Virginia › Fairfax › Relentless MMA & Fitness
Relentless MMA & Fitness
5 ★★★★★ 68 Google reviews · Kickboxing gym in Fairfax, Virginia
Affiliated gym — reviews and the gym's own info suggest it belongs to a known kickboxing or boxing-fitness franchise or network (think 9Round, iLoveKickboxing, CKO, TITLE Boxing Club or Jabz). Franchise gyms run a consistent class format and are often a friendly, familiar place to start. If a specific brand matters to you, confirm it on the gym's own site.
Plan your first class
- Beginner-friendly all fitness levels welcome, including total beginners — no experience needed, and you get in shape by training, not before
- Cardio kickboxing classes high-energy cardio kickboxing on the bags and pads — a fun, sweaty workout built for fitness and weight loss, at your own pace
- Kids & teen classes kids and teen kickboxing classes — built around confidence, focus, and fun
- Private lessons one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
- Competition team a competition team for members who want to test themselves in the ring — amateur kickboxing, muay thai, or K-1
- Today see hours ·
- Website & schedule relentlessmmaandfitness.com — book classes and see the live schedule
- Phone +1 540-999-8270
Hours
| Monday | 5:30 am–11 pm |
| Tuesday | 5:30 am–11 pm |
| Wednesday | 9 am–5 pm |
| Thursday | 9 am–5 pm |
| Friday | 5:30 am–11:30 pm |
| Saturday | 5:30 am–10 pm |
| Sunday | 6 am–8 pm |
The classes they run
“Great teaching style and he can adjust it to all skill levels.”
“If you are looking to learn self defense, compete, or stay fit David Carter will get you there.”
“Been going here for almost 1 year and I've gone from knowing nothing and out of shape to be in the best shape I've ever been and knowing the secrets of Muay Thai!”
“I attend at least 3 MuayThai, MMA Boxing, Boxing and self defense classes every week.”
“I schedule a personal training session with Coach David Carter weekly in Arlington, VA and drive to Relentless MMA in Chantilly, VA when able.”
“I also love the boot camp classes, even at 9AM on Saturdays!”
“I learn new techniques every class and continue to work on perfecting techniques from previous classes- all while getting a great workout.”
Other martial arts here
“Been going here for almost 1 year and I've gone from knowing nothing and out of shape to be in the best shape I've ever been and knowing the secrets of Muay Thai!”
“I attend at least 3 MuayThai, MMA Boxing, Boxing and self defense classes every week.”
“Dave Carter at Relentless MMA is hands down ( I know coach keep my hands up ) the best coach I have had in my 20 year sports career; soccer, lacrosse.”
“He’s deeply passionate about martial arts and highly skilled in multiple disciplines, including Muay Thai, Karate, Kali, and Jiu-Jitsu.”
“He’s deeply passionate about martial arts and highly skilled in multiple disciplines, including Muay Thai, Karate, Kali, and Jiu-Jitsu.”
“I am still amazed that after all these years he still has a wealth of new combat sport and self defense knowledge to share.”
What members say
“Fantastic gym and fantastic coach. What makes David Carter a great coach is his love of MMA, in-depth knowledge and great coaching/communication skills.”
“As soon as I walked in the door Dave was kind and welcoming and put my nerves at ease.”
“I learn new techniques every class and continue to work on perfecting techniques from previous classes- all while getting a great workout.”
“Been going here for almost 1 year and I've gone from knowing nothing and out of shape to be in the best shape I've ever been and knowing the secrets of Muay Thai!”
“No matter what shape you are in, from getting started on your fitness journey to competition-grade martial arts, you need to go where the best training is.”
“There’s always some type of great deal going on for new people to try it out.”
From the reviews
Can't say enough good things about Relentless MMA & Fitness. Coach Dave is the best instructor I've ever had (and I've had A LOT). It took me 40 years to finally find a place and instructor who makes me actually want to come to class and smile while I'm there!
Where do I start. Dave Carter at Relentless MMA is hands down ( I know coach keep my hands up ) the best coach I have had in my 20 year sports career; soccer, lacrosse. I was a bit nervous going into the gym, not knowing what to expect.
I have always hated going to the gym to work out, but training Muay Thai at Relentless has been an wake up experience for me. I have no major intentions of fighting matches, but cutting weight and building some muscle tone ARE my goals. Learning to effectively defend myself form harm is just a big plus.
I find it hard to express in words how great this gym is. Coach Carter is very knowledgeable and explains new techniques in a ways that are easy to understand. His knowledge extends past the violence. He has helped me with diet plans and he has personally helped me rehab my knee after surgery.
New to kickboxing? Start at Relentless MMA & Fitness
Relentless MMA & Fitness comes up as a beginner-friendly gym, going by their listing and members’ reviews. If you've never thrown a punch or a kick, that's exactly who a good beginners class is for. A few things worth knowing before your first week. First, you don't need to be fit or coordinated to start — you get in shape by training, not before it, and coaches scale every drill to you. Second, you won't be thrown into hard sparring — reputable gyms build the basics (stance, footwork, and punches and kicks on pads and bags) first, and any contact eases in gradually under a coach's control. Third, all fitness levels really are welcome — ask about a dedicated beginners or fundamentals class time so your first session is alongside others who are also starting out. Most gyms are happy to let you watch or try a class first, so reach out before you commit.
Your first kickboxing class at Relentless MMA & Fitness
Nervous about walking into a kickboxing gym for the first time? Almost everyone is, and good coaches expect beginners to come through the door. Here's what to know. What to expect: a typical first class is a warm-up, then drilling the basics — stance, footwork, and punches and kicks on pads or a heavy bag — not hard sparring. Go at your own pace and rest whenever you need to; no one will bat an eye. What to wear: comfortable athletic clothes you can move and sweat in, and supportive trainers. What to bring: water, and hand wraps and gloves if you have them — many gyms lend loaner gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves and wraps (and shin guards once you start sparring). Sparring is optional and eases in gradually, once your basics are solid. Arrive 10–15 minutes early to sign a waiver and meet the coach. It gets easier fast — most people feel far more at home by their third class.
More kickboxing gyms near Fairfax
Kaizen MMA Fairfax
4.7 ★★★★★ 89 reviews
TITLE Boxing Club Fairfax
4.8 ★★★★★ 365 reviews
🥊 Free trial / intro class — check their site
Capital MMA & Elite Fitness | Fairfax, VA
4.8 ★★★★★ 57 reviews