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Steel MMA and Fitness

4.8 ★★★★★ 50 Google reviews · Kickboxing gym in San Diego, California

Kickboxing gym Free trial Beginners welcome Kids & teens Cardio kickboxing Competition team

Clean venue offering Muay Thai and Jiu-Jitsu classes in a friendly atmosphere.

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 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 (ages 8–18) — built around confidence, focus, and fun
  • Sparring sparring and partner work for members who want it — always optional, eased in gradually, with the coach controlling the contact
  • 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 steelmma.com — book classes and see the live schedule
  • Phone (858) 987-0113

Hours

Monday 9 AM–8:30 PM
Tuesday 10 AM–8:30 PM
Wednesday 10:30 AM–8:30 PM
Thursday 10 AM–8:30 PM
Friday 10:30 AM–8:30 PM
Saturday 9 AM–1 PM
Sunday Closed

Hours shift for holidays and class-schedule changes — worth a quick check before a special trip.

The classes they run

Kickboxing classes on the schedule at Steel MMA and Fitness, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🔥 Cardio Kickboxing 2 mentions

“On top of their Muay Thai classes, their cardio heavy bag classes also go beyond giving members a good workout.”

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🧒 Kids Kickboxing 7 mentions

“The lessons from the Muay Thai and Jiu Jitsu sessions have been more than the basic skills, my children have learned life lessons in these classes.”

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🌱 Beginners 6 mentions

“Whether you’re a pro looking for a new gym, or a beginner looking for your start, this gym is it!”

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🤜 Sparring 2 mentions

“Con: they don’t have an open mat and they probably could slot one in on Friday.”

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🏆 Competition Team 5 mentions

“I have been training here for three years now and never thought i would compete but the team here helped and supported me on my journey to make it happen not just once but twice!”

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🦵 Muay Thai 12 mentions

“The lessons from the Muay Thai and Jiu Jitsu sessions have been more than the basic skills, my children have learned life lessons in these classes.”

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Teens Kickboxing

“It's amazing to see full classes with kids and teens.”

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Other martial arts here

Kickboxing gyms are usually multi-discipline. Here's what else members mention training under the same roof at Steel MMA and Fitness — mined from their reviews and the gym's own info.

🦵 Muay Thai 12 mentions

“The lessons from the Muay Thai and Jiu Jitsu sessions have been more than the basic skills, my children have learned life lessons in these classes.”

Other gyms that also teach muay thai →

🏟️ MMA 13 mentions

“Now, I'm not one to sit on any machines, I only do classes, so when I found Steel MMA, it was perfect!”

Other gyms that also teach mma →

🥋 Brazilian Jiu-Jitsu 11 mentions

“The lessons from the Muay Thai and Jiu Jitsu sessions have been more than the basic skills, my children have learned life lessons in these classes.”

Other gyms that also teach brazilian jiu-jitsu →

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 muay thai, boxing, or MMA alongside your kickboxing, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 50 Google reviews — in their own words.

🧑‍🏫 expert, motivating coaching 6 mentions

“Coach Jeremy and coach Mike are amazing jiu jitsu practitioners and are really attentive to you whether it's your first day on the mats or your training for a competition.”

🌱 welcoming to beginners 9 mentions

“Coach Jeremy and coach Mike are amazing jiu jitsu practitioners and are really attentive to you whether it's your first day on the mats or your training for a competition.”

🎉 fun, high-energy classes 3 mentions

“I wanted to find a gym that had fun classes that would also give me an incredible workout.”

🏆 active competition / fight team 7 mentions

“I have been training here for three years now and never thought i would compete but the team here helped and supported me on my journey to make it happen not just once but twice!”

🧼 clean, well-equipped gym 7 mentions

“Top notch gym with knowledgeable Muay Thai coaches, a clean environment, and winning fighters to improve your fitness and technique.”

💗 welcoming to women 2 mentions

“From the moment I walked in, Mike, one of the owners greeted me and walked me through the program.”

From the reviews

Carl is hands down the most dedicated coach. He goes above and beyond for his fighters even when you are not the top of the food chain. I have friends competing at different levels and you wouldn’t believe the things he does to support everyone’s dreams.

★★★★★ — Mimi, Apr 2026

After having trained at this gym for 6 years now, and having tried many other gyms in the San Diego area, I can confidently say that Steel is the best striking gym I have ever been to.

★★★★★ — Brendon, Jan 2022

I’ve been working with the head Muy Thai instructor, Carl, since 10th grade. He has always made everyone I have seen feel welcomed and seen in class and is sure to be helpful and honest when answering questions. He has built up a great team in both instructors and staff that is always helpful and useful.

★★★★★ — Davan, Sep 2024

My 12 year old son loves his Muay Thai class here. There are different levels for experience. The coaches and all the staff are all really great, they make you feel welcomed and valued. The classes are fun and safe but also challenging enough for them to push themselves and actually learn.

★★★★★ — Corey, Feb 2026

Excerpts from public Google reviews. Read all 50 reviews →

New to kickboxing? Start at Steel MMA and Fitness

Steel MMA and Fitness 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 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.

See their beginner class info

Your first kickboxing class at Steel MMA and 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.

Kickboxing is a contact sport. Warm up, pace yourself, 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 Steel MMA and Fitness

5910 Santo Rd, San Diego, CA92124

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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.