HomeMassachusettsWatertown › Theodorou Academy of Jiu Jitsu

Theodorou Academy of Jiu Jitsu

5 ★★★★★ 17 Google reviews · BJJ gym in Watertown, Massachusetts

BJJ gym Beginners welcome Competition team

Plan your first class

  • Beginner-friendly all levels welcome, including total beginners — you don't need to be fit or have any experience to start
  • Open mat open-mat rolling sessions for members to practice live — always optional and at your own pace
  • Competition team a competition team for members who want to test themselves at tournaments
  • Website & schedule bostonselfdefense.com — book classes and see the live schedule
  • Phone (508) 740-4872

The classes they run

BJJ classes on the schedule at Theodorou Academy of Jiu Jitsu, confirmed in members' own reviews and the gym's own info — not guessed from the sign out front.

🛡️ Self-Defense 7 mentions

“The idea of gaining skills in self defense beyond just grinding away on a cardio machine, or boot-camp class seemed more motivating to me and it stuck.”

All gyms that run self-defense →

Other martial arts here

BJJ gyms are usually multi-discipline. Here's what else members mention training under the same roof at Theodorou Academy of Jiu Jitsu — mined from their reviews and the gym's own info.

🥊 Muay Thai

“I've been fortunate enough to have spent time training in a multitude of martial arts in many places (Judo, Muay Thai, BJJ, Krav, Shotokan, Boxing) and taken seminars in others.”

Other gyms that also teach muay thai →

🥊 Boxing

“I've been fortunate enough to have spent time training in a multitude of martial arts in many places (Judo, Muay Thai, BJJ, Krav, Shotokan, Boxing) and taken seminars in others.”

Other gyms that also teach boxing →

🤼 Judo

“I've been fortunate enough to have spent time training in a multitude of martial arts in many places (Judo, Muay Thai, BJJ, Krav, Shotokan, Boxing) and taken seminars in others.”

Other gyms that also teach judo →

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 MMA, muay thai, or wrestling alongside your BJJ, confirm the current schedule with the gym.

What members say

The things reviewers bring up again and again across 17 Google reviews — in their own words.

🧑‍🏫 expert, high-level coaching 4 mentions

“Sensei Nick is an incredible instructor who teaches because he loves Jiu Jitsu and truly cares about seeing his students succeed by getting a little better each day.”

🤝 no-ego, friendly academy 4 mentions

“If the training isn’t enough, the people and community built by Sensei Nick is really like a family.”

📘 strong technique & fundamentals 5 mentions

“Classes I feel are a good balance of pushing your comfort zone and focusing on technique.”

great workout & conditioning 3 mentions

“The idea of gaining skills in self defense beyond just grinding away on a cardio machine, or boot-camp class seemed more motivating to me and it stuck.”

🧠 builds confidence & discipline 3 mentions

“Classes I feel are a good balance of pushing your comfort zone and focusing on technique.”

From the reviews

I've trained at this dojo for 8+ years and it has helped molded who I am today. Prior to starting here, I wasn't motivated by a traditional gym or other forms of activity. In the interest of trying to push myself to a healthier lifestyle, I decided to give jui jitsu a try.

★★★★★ — Nick, Jun 2019

I've been training here for almost 9 years and I often think how lucky I am to have found this martial art style and especially this school. American Jiu Jitsu as a martial art itself is fun, exciting, with practical self-defense at its core.

★★★★★ — Justin, Jun 2019

I’ve been very lucky to train here for almost 9 years. The head instructor always provides fresh and exciting technique material for both lower and higher rank classes to work on while making sure that students have enough time to continue honing the rest of their martial arts skills.

★★★★★ — Spencer, Jun 2019

I just had my intro class and have decided to join as a student. Nick, the owner is a great guy, he is very straight forward and honest and is an accomplished martial artist. He has been in business for 25 years and has created a special school.

★★★★★ — Mo, Sep 2015

Excerpts from public Google reviews. Read all 17 reviews →

New to BJJ? Start at Theodorou Academy of Jiu Jitsu

Theodorou Academy of Jiu Jitsu comes up as a beginner-friendly gym — noted on their own site. If you've never rolled or set foot on a mat, 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 or flexible to start — you get in shape by training, not before it, and coaches scale the intensity to you. Second, you won't be thrown into hard rolling — reputable gyms build fundamentals (positions, escapes, and basic submissions) for weeks, live rolling eases in gradually, and tapping early keeps every roll safe. 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, and leave your ego at the door. Most gyms are happy to let you watch or try a class first, so reach out before you commit.

Check beginner classes on their site

Your first BJJ class at Theodorou Academy of Jiu Jitsu

Nervous about walking into a BJJ 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 basic positions and escapes with a partner — not hard sparring. Rest whenever you need to; no one will bat an eye. What to wear: athletic wear you can move in (or a gi if you have one); you'll train barefoot on the mats. What to bring: water and a mouthguard if you have one — many gyms lend a loaner gi for a first class, so it's worth asking when you call. As you keep training you'll add your own gi (or a rashguard and shorts for no-gi) and a mouthguard. Live rolling eases in gradually, 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.

BJJ is a contact sport. Ease in, tap early and often, 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 Theodorou Academy of Jiu Jitsu

201 Arlington St, Watertown, MA02472

Get directions

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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.