Brazilian Jiu-Jitsu (BJJ) Classes in the Boston Metro

Get Stronger, Smarter, and More Confident

Try our Brazilian Jiu-Jitsu classes free and see why Sigma Martial Arts is the leading BJJ studio in Boston. Whether you're looking for fitness, self-defense, or personal growth, our expert instructors will guide you every step of the way.

If you’d like to schedule a one-on-one private class, please reach out to the Sigma team directly by clicking here.

Discover the Art of Brazilian Jiu-Jitsu – Perfect for All Skill Levels!

Are you ready to master one of the most effective martial arts in the world? At Sigma Martial Arts & Fitness, our Brazilian Jiu-Jitsu (BJJ) program offers top-tier instruction in a clean, safe, modern studio environment. Whether you're a beginner looking to start your martial arts journey or an experienced practitioner aiming to sharpen your skills, we welcome you to join our BJJ community.

Why Choose Our BJJ Program?

  • Expert Instructors: Learn from seasoned BJJ black belts with years of teaching and competitive experience.

  • Clean, Modern Studio: Train in a comfortable, state-of-the-art facility designed for top performance.

  • All Levels Welcome: Whether you're new to martial arts or have years of experience, our classes are tailored to help you grow and succeed.

  • Fitness & Self-Defense: Get in shape while learning practical self-defense techniques that can protect you in real-world situations.

  • Your Safety Comes First: Our instructors are trained in first aid and maintain a safe training environment, so you can focus on getting stronger and more confident.

Join Our BJJ Community! Our BJJ classes foster a supportive and friendly environment where you’ll build strength, improve mental focus, and gain confidence both on and off the mats. Experience the camaraderie of training with like-minded individuals and take your fitness and martial arts skills to the next level.

What People Are Saying

  • Amazing coach, clean facility, nice and fun learning environment. Basically the best Muay Thai practice I ever had! Strongly recommended!!!!!

    Kaofang N.

  • Was extremely impressed with how clean the dojo was! The Judo Instructor Sensei Mo was very friendly welcoming and knowledgeable. Cant wait to go back.

    Tony D.

  • This is a great place to learn karate for children the instructors have a lot a patience and they are also very professional and still make It fun for kids.

    Ana Maria L.

  • This is an awesome martial arts studio. The owner runs a clean operation, and the instruction is top notch. The dojo is well appointed with safety padding on floors and pillars, and has floor to ceiling mirrors to check your form during classes. I hope all aspiring martial arts students and aficionados alike take note of this hidden gem!

    Vambah S.

  • This place is the best! They have a balanced mix of traditional and practical martial arts training. Their classes are always fun, informative and a great workout!

    Mickey T.

  • Very clean, spacious, and a great selection of gear to use.

    Joshua C.

  • I've been going here for almost a whole year, and I absolutely love the place. It's welcoming, fun, clean, and a great workout! The instructors are friendly and kind, they offer a lot of different classes, and it's great for both kids and adults. To me, it's a perfect middle ground between the extremes of super hardcore bro gyms that focus only on competition, and flakey programs that give you exercise but no real martial arts training.

    Alison E.


  • Impressive place. Clean, organized and professional. The instructors are seasoned professionals and everything is at your own pace. All skills levels. Everyone just super nice and supportive. And awesome workout!

    William B.

  • I started out doing adult martial arts, but liked the school and the style so much I have now also taken up Muay Thai. Both classes are a lot of fun. I am learning something new every time, and I’ve become much stronger (no more back pain, hurray!). For the quality of instruction, number of opportunities to train throughout the week and individual attention you get it’s really very good value for money. I cannot recommend this place enough!

    Lauren D.

  • This is a great addition to Medford. The studio is clean and the instructors are phenomenal. There's a great sense of community and the atmosphere is welcoming for anyone who is new or has experience in martial arts, kickboxing, or mauy thai. Since joining the studio, I have been recommending it to my friends since I'm always learning so much here and growing my skills in martial arts.em

    Kristina B.

  • As a new student to martial arts I really appreciate their attention to detail, stories about their previous experiences and of course getting in a good workout! I have had nothing but a great experience and look forward to many more classes. If you are considering starting martial arts or just want a good workout in a positive setting, I highly recommend Sigma.

    Jessica R.

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