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Fortuna Brazilian Jiu-Jitsu

5 ★★★★★ 20 Google reviews · Muay thai gym in O'Fallon, Missouri

Muay Thai gym Free trial Beginners welcome Kids & teens Private lessons Fitness classes Fight team

Plan your first class

  • Free trial or intro class most gyms welcome new members with a free trial or intro class — check their site or give them a call to book your first session
  • Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
  • Kids & youth classes kids and youth muay thai classes — built around discipline, focus, and confidence
  • Private lessons private, one-on-one coaching available — a focused way to start or to work around a busy schedule; ask about availability and rates
  • Fitness & conditioning muay thai fitness and cardio classes — a serious workout you can do without ever having to spar
  • Fight team a competition team for members who want to test themselves as amateur fighters
  • Today see hours ·
  • Website & schedule fortunabjj.com — book classes and see the live schedule
  • Phone +1 636-638-8622

Hours

Monday 4:30–8 pm
Tuesday 4:30–8:30 pm
Wednesday 4:30–8 pm
Thursday 4:30–8:30 pm
Friday 5–8 pm
Saturday 9 am–12 pm
Sunday Closed

Hours shift for holidays, seminars, and open-gym times — worth a quick check before a special trip.

The classes they run

Muay thai classes on the schedule at Fortuna Brazilian Jiu-Jitsu, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🌱 Beginner Muay Thai 4 mentions

“Whether you’re a beginner or a seasoned grappler, you’ll find exactly what you need to improve.”

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🧒 Kids Muay Thai 22 mentions

“The gym itself has a very welcoming vibe, when i walked in there were several parents sitting, watching their kids learn Jiu Jitsu.”

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👤 Private Lessons 2 mentions

“I’m lucky to have the opportunity to do 1-on-1 sessions with him and also attend his BJJ and KB classes throughout the week.”

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🔥 Muay Thai Fitness 2 mentions

“I came from 9Round in January, and was looking for a gym that taught technique while still getting a great workout in.”

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🏆 Fight Team

“Marcel is not only a very accomplished grappler and MMA fighter, but is also a patient and insightful teacher.”

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Other martial arts here

Muay thai gyms are usually multi-discipline. Here's what else members mention training under the same roof at Fortuna Brazilian Jiu-Jitsu — mined from their reviews and the gym's own info.

🦵 Kickboxing 5 mentions

“I do the kickboxing and let me tell you there is no better way to meet some great people and work your entire body while feeling like a badass!”

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🥋 Brazilian Jiu-Jitsu (BJJ) 33 mentions

“The gym itself has a very welcoming vibe, when i walked in there were several parents sitting, watching their kids learn Jiu Jitsu.”

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🏟️ MMA

“Marcel is not only a very accomplished grappler and MMA fighter, but is also a patient and insightful teacher.”

Other gyms that also teach mma →

Disciplines are mined from reviews and the gym's own info — they show what members have trained, not a formal class guarantee. If you specifically want BJJ, boxing, or MMA alongside muay thai, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 20 Google reviews — in their own words.

🧑‍🏫 expert, authentic coaching 7 mentions

“Marcel is such an amazing coach and person—his passion and his dedication to his students really shines through.”

🌱 welcoming to beginners 14 mentions

“As others came in, they were all very welcoming and made me feel like id been training here for years, not just dropping in as a stranger from another school.”

🤝 no-ego, friendly gym 14 mentions

“As others came in, they were all very welcoming and made me feel like id been training here for years, not just dropping in as a stranger from another school.”

📘 real technique & fundamentals 8 mentions

“The attention to detail in every technique is incredible, and I’ve made more progress here than anywhere else I’ve trained.”

🔥 killer workout & conditioning 2 mentions

“I came from 9Round in January, and was looking for a gym that taught technique while still getting a great workout in.”

🧒 strong kids program 4 mentions

“I noticed that Professor Marcel is great with kids along side Daniel who is an assistant coach and has kids enrolled there as well!”

From the reviews

I was in town for a week and was looking around for a place to train, contacted Marcel and he invited me in for a class. Got there during kids class and watched him and another instructor doing work with the kids. Kids were enjoying class and looked to be getting some good training in.

★★★★★ — Josh, Aug 2024

Can’t say enough about Fortuna BJJ or Marcel!! Marcel has been my 1 on 1 Professor/Instructor for over 3 years now. It was a no-brainer to follow him when he opened his new gym a little over a year ago, because he’s absolutely the best at what he does!

★★★★★ — Andrew, Jun 2024

So glad I joined this gym. I came from 9Round in January, and was looking for a gym that taught technique while still getting a great workout in. I have grown so much in the short time I've been here, Marcel is be best coach!!!

★★★★★ — Emily, Jul 2024

FIrst impression. The gym itself has a very welcoming vibe, when i walked in there were several parents sitting, watching their kids learn Jiu Jitsu. I noticed that Professor Marcel is great with kids along side Daniel who is an assistant coach and has kids enrolled there as well!

★★★★★ — Aye-1, Dec 2024

Excerpts from public Google reviews. Read all 20 reviews →

New to muay thai? Start at Fortuna Brazilian Jiu-Jitsu

Fortuna Brazilian Jiu-Jitsu comes up as a beginner-friendly gym — noted on their own site. If you've never thrown a punch or a kick, that's exactly who a good beginners program is for. A few things worth knowing before your first week. First, you don't need to be fit to start — you get in shape by training, not before it, and coaches scale the conditioning to you. Second, you won't be thrown into sparring — reputable gyms build fundamentals (stance, footwork, and the basic strikes of the "art of eight limbs") for weeks before any contact, and sparring stays optional. Third, all 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.

See their beginner class info

Your first muay thai class at Fortuna Brazilian Jiu-Jitsu

Nervous about walking into a muay thai 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 on pads and bags — not fighting. Rest whenever you need to; no one will bat an eye. What to wear: shorts or athletic wear and a t-shirt; you'll train barefoot on the mats. What to bring: water and hand wraps if you have them — many gyms lend gloves for a first class, so it's worth asking when you call. As you keep training you'll add your own gloves, wraps, a mouthguard, and shin guards. Sparring is optional and comes later, once your fundamentals 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.

Muay thai is a contact sport. Ease in, listen to your coaches, and if you have any injuries or health concerns, mention them before class and check with a doctor if you're unsure.

Where to find Fortuna Brazilian Jiu-Jitsu

127 Triad Center W, O'Fallon, MO63366

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Listing verified July 2026 from public business records and member reviews. Something out of date? Report a correction. Own this gym? Claim your listing — it's free.