JG Monster Jiu-Jitsu Fitness
About
JG Monster Jiu-Jitsu Fitness in Brooklyn offers Brazilian Jiu-Jitsu and MMA training with a distinctive approach that blends martial arts with holistic fitness. The gym is led by black belt instructor Jeff, who has over 20 years of experience training with top practitioners, and his partner Carolyn, a skilled yoga and mobility coach. Their system combines technical jiu-jitsu instruction with mobility work, breathwork, and fitness concepts, supported by equipment comparable to a physical therapy practice. Classes emphasize detailed, personal instruction in a clean, safe environment, with small class sizes that allow for individualized attention regardless of skill level.
reviewsWhat Members Say
Members consistently praise Jeff's phenomenal teaching ability, noting how he makes jiu-jitsu accessible to all levels with clear, concept-focused instruction that blends humor and technical depth. They highlight the welcoming community, small class sizes that enable personalized attention, and the holistic approach combining martial arts with mobility work, breathwork, and fitness training. Specific appreciation is given for how this approach improves technical skills while minimizing injuries, with many reporting transformative physical and mental benefits. The only noted consideration is that those seeking intensely competitive rolling might prefer a different environment, as the gym emphasizes technical drilling and light sparring.
rate_reviewGoogle Reviews (5)
Douglas Gornick
6 years ago
I joined JG Jiujitsu as soon as they opened. I am a 58 year old male and have had my life challenges. Since joining my energy level has improved, my core strength has improved, I am getting in better shape, and I am learning techniques and movements that I never thought were possible for myself. As tough as each class is I anxiously await the next one! Jeff and Carolyn are committed to each member and will work with you to maximize this journey that you never thought was possible.
Ronny Davila
3 years ago
I’ve known and trained with Jeff since 18 years old and have seen him grind throughout the years not just on the mats but life in general. His evolution of a fitness trainer to a martial arts practitioner has been a sight to see. The combination of both in addition to his mental and breathing concepts is a system that would uplift anyones mood, confidence and overall change you as a person.
Ryan Bier
4 years ago
Jeff is a phenomenal instructor with the ability to mix humor seamlessly with direct easy to understand teaching methods. His grasp of jiu jitsu concepts is highly developed, and communicated easily while teaching individual techniques. This allows for students to make rapid progress understanding the why, not just the how. Jeff is also deeply committed to maintaining a clean and safe environment for his students to learn and grow in. If you’re looking for a place to start or continue your jiu jitsu journey, you have found it.
John Cooney
2 years ago
I highly recommend joining JG Fitness if you: - Love technical Jiu Jitsu and are looking for more personal, detailed instruction. - Are interested in holistic fitness, such as mobility work and breathwork. - Are looking for an awesome community of friendly health-minded people. I've trained BJJ for a couple of years at a large gym in Manhattan, and before that I was a successful high school wrestler. Though I progressed to my blue belt at my first gym, I found myself getting hurt constantly, and my technical skills had plateaued as the class size was such that I was having a hard time getting personal instruction. My experience with JG has been very positive. In two months of training I can confidently say that my technique has dramatically improved, specifically guard passing and submission technique. JG is a high level black belt who spent 20 years training with the best guys in the sport. At most gyms you would be receiving instruction from instructors who have far less experience than Jeff, particularly if you are a beginner - so it's pretty rare to find a gym where you can have small class sizes taught by someone of Jeff's caliber. I'm also feeling generally as fit as I've ever been since my high school wrestling days thanks to the JG approach to fitness and movement. Jeff and his partner, Carolyn, have the knowledge and equipment of a full fledged PT pratice. Carolyn is a highly skilled Yogi and fitness instructor herself. I've been practicing yoga sporadically for 6 years, and she is without a doubt the best Yoga / Mobility coach I've learned under. They've helped me address some old injuries and tightness, and I'm really thankful to have their help. One thing to note, if you are looking to test yourself with intense and competitive rolls, this may not be the place for you. While there is light rolling, Jeff intentionally emphasizes technical drilling, light rolls and movement training. For me this is ideal, I have a lot of experience with intense rolls and I'm happy to spend more time in the gym learning technique and less time sidelined by injuries from hard rolls. With that said, if you are looking for the unique intense workout you can get from a competition gym, you might consider another type of school.
Christopher Cimorelli
4 years ago
Jeff teaches jiu jitsu in a way that is accessible to everyone from beginners up to higher level practitioners. Jeff truly cares about his students’ progress and is enthusiastic about sharing his vast technical knowledge. I trained for years at a big school in Manhattan and the quality of instruction at JG Monster Jiu Jitsu paired with Jeff’s personal approach to teaching create a learning atmosphere that is unmatched. If you’re looking to get in the best shape of your life while learning an effective martial art in a welcoming environment, look no further than JG Monster Jiu Jitsu.
Contact
1256 Prospect Ave, Brooklyn, NY 11218, USA
scheduleHours
Monday: 9:00 AM – 9:00 PM
Tuesday: 9:00 AM – 9:00 PM
Wednesday: 9:00 AM – 9:00 PM
Thursday: 9:00 AM – 9:00 PM
Friday: 9:00 AM – 9:00 PM
Saturday: 9:00 AM – 9:00 PM
Sunday: 9:00 AM – 9:00 PM