Become More Capable, Confident, and Composed
Sigma’s adult martial arts program helps you build real striking skills, improve your fitness, reduce stress, and become more confident under pressure.
No martial arts experience needed, no need to get in shape first. We are a welcoming place to start at any level.
Located in Medford, MA, Sigma serves adults from across the surrounding communities and the greater Boston area.
A Different Kind of Adult Workout
Most workouts ask you to repeat the same movements without giving you a meaningful reason to come back.
Martial arts is different.
Every class gives you something new to learn. You improve your fitness while developing balance, coordination, focus, defensive awareness, and real striking technique.
That progress matters. You are not simply trying to finish a workout. You are learning how to move with greater control, strike with better technique, and remain composed when training becomes challenging.
Classes are serious, structured, and purposeful. They are also welcoming. You will not be expected to prove yourself, compete with experienced members, or figure everything out on your own.
You will be coached from where you are.
Built for All Levels. Designed for Long-Term Growth.
Starting martial arts can feel intimidating.
You may be worried that you will not keep up. You may feel out of shape, uncoordinated, or unsure of what to expect. You may think everyone else will already know what they are doing.
Those concerns are normal.
Our program gives beginners a clear and accessible starting point. Instructors explain each skill, why it matters, and how to practice it safely. You will build your foundation one class at a time.
Experienced martial artists can also continue developing through more technical partner training and controlled application.
You do not need to decide how far you want to go before you begin. Some members want fitness and bag training. Others want partner work, sparring, or deeper martial arts development.
Each path is valid.
Confidence is not something you must bring with you. It develops as you gain knowledge, improve your control, and see yourself becoming more capable.
One Program. Three Ways to Progress.
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LEVEL 1: Sigma Strike Lab
Build fitness, confidence, and strong striking fundamentals in a high-energy, bag-based class. You will learn proper stance, footwork, punches, kicks, defense, and movement without sparring or partner contact. Strike Lab is a welcoming place to start, even if you have no martial arts experience.
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LEVEL 2: Partners and Pads
Develop your technique through cooperative partner drills, pad work, and controlled defensive exercises. You will learn how to manage distance, build effective combinations, use angles, and respond to another person safely. This class builds practical skill and prepares members for more advanced training without open sparring.
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LEVEL 3: Advanced Sparring
Apply your skills against a resisting partner in a controlled and respectful environment. This optional advanced class develops timing, range control, defense, strategy, composure, and decision-making under pressure. It is designed for members who are ready for controlled sparring, deeper martial arts development, or competition preparation.
What People Are Saying
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![five star review]()
Amazing coach, clean facility, nice and fun learning environment. Basically the best Muay Thai practice I ever had! Strongly recommended!!!!!
Kaofang N.
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![five star review]()
Very clean, spacious, and a great selection of gear to use.
Joshua C.
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![five star review]()
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.
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![five star review]()
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.
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![five star review]()
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.
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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.
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![five star review]()
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.
What You Can Gain From Training
People begin martial arts for different reasons.
Some want a more interesting way to exercise. Some want to feel safer. Some need a break from work and daily responsibilities. Others want to challenge themselves, meet new people, or finally become consistent with something meaningful.
Our program is built to support all of those goals.
Improve Your Fitness
Martial arts develops strength, stamina, coordination, balance, mobility, and body control.
Because your mind stays engaged, class feels different from repeating the same routine on a treadmill or exercise machine. You are working hard, but you are also solving problems and developing skill.
Fitness becomes part of a larger goal.
Learn Practical Skills
You will learn real stand-up martial arts skills, including striking, movement, defensive habits, range awareness, and controlled application.
You will understand what you are doing and why it works. You will not be asked to blindly copy movements without instruction or context.
Reduce Stress
Training gives you a place to step away from work, responsibilities, and constant mental noise.
For the length of the class, your attention is on your movement, breathing, technique, and the task in front of you.
That focus can help you leave class feeling clearer, more grounded, and more present.
Build Earned Confidence
Real confidence comes from knowledge and preparation.
As you learn new skills, overcome difficult rounds, and see your progress, you begin to trust yourself more. You know what you can do because you have practiced it.
That confidence often carries into the rest of life.
Train With Other Motivated Adults
You should not have to work out alone.
At Sigma, members train in a cooperative environment built around respect, encouragement, and shared progress. You will be surrounded by adults who are working toward their own goals and helping one another improve.
There is no place for ego, intimidation, or humiliation.
Create Consistency
Many adults do not struggle because they are incapable of working hard.
They struggle because their routine gives them no clear goal, accountability, or sense of progress.
Our curriculum provides structure. Your instructors help you understand what you are working on, where you are improving, and what comes next.
That makes it easier to build a training habit that lasts.
Frequently Asked Questions
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No.
Our adult program is designed to give complete beginners a clear and comfortable starting point. Instructors explain the fundamentals and help you progress one skill at a time.
Experienced martial artists can also continue developing through our partner and advanced training levels.
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No.
You do not need to get fit before starting martial arts. Fitness develops through consistent training.
You will be encouraged to work hard, but you can build your conditioning over time. Instructors can help you adjust the intensity when needed.
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No.
Sparring is part of an optional advanced track. Many members choose to train in Sigma Strike Lab or Partners & Pads without participating in sparring.
You will never be pressured to move into a type of training that does not match your goals.
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No.
New members typically begin in Sigma Strike Lab, which is a bag-based class. Members do not strike one another or participate in live partner exchanges.
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LEVEL 1: Sigma Strike Lab and LEVEL 2: Partners & Pads classes are approximately 55 minutes.
LEVEL 3: Advanced Sparring classes are approximately 90 minutes.
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We recommend at least twice a week for best results.
Most members benefit from a consistent schedule that allows them to build fitness, retain skills, and develop momentum.
Your instructor can help you choose a training frequency that fits your goals and schedule.
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Comfortable athletic clothing is generally recommended. Avoid clothing with zippers, hard pieces, or anything that may interfere with movement.
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If you have any equipment, we recommend bringing it to your first class. If you do not have any equipment, we have loaner equipment that you can use for your first class. Your instructor can work with you to ensure you have the right equipment for your training goals.
Explore our schedule and book a free intro class today
If you’d like to schedule a one-on-one private class, please reach out to the Sigma team directly by clicking here.