Very nice gym, friendly all people!!! This is my second home, all equipment very comfortable!!! I’ll love it this is location 👍✊💯🥊 My Dora love it truck suit from gym, thank you so much Coach!!!

Celebrating my one-year anniversary with Ilya, Natasha and the entire underground boxing team. They have completely changed my life and I am celebrating a 90 pound weight loss because of them. They are hard-working, have an impeccable work ethic and are completely and utterly inspiring. Thank you from the bottom of my heart!

A gym unlike any other you can experience. I wholeheartedly believe this is the best gym on the eastern seaboard. Do yourself a favor and come and experience what true mastery of pugilism looks like.

If you're looking for a high-energy, intense workout, look no further than Underground Boxing Gym! This place is absolutely amazing, and I cannot recommend it enough. The staff are incredibly knowledgeable and experienced, making every class both challenging and rewarding. Whether you're a beginner or an experienced boxer, they will work with you to ensure you get the most out of each session. The atmosphere is electric. The energy in the room is contagious, and the sense of community among the members is truly inspiring. You'll be amazed at how quickly you feel like a part of the family! You won't find a more supportive, challenging, and energizing workout anywhere else. Trust me - give it a try, and you won't regret it!

The best coaches Iliya and Natalia. If you want to loose weight and become stronger it’s the right place to choose. It’s very intense and non stop 1.5hour workout. The coaches care about the results. I highly recommend this gym for both adults and children.

After several visits to phony boxing gyms. Gd blessed me to find this authentic style boxing gym. I have been going to the 8am group class for 3 years now and hardly miss a day. These is not a single week where I don’t encounter a former or current pro boxer here. They love coming to train and spar with the trainers and students. Many champions produced at many levels and age groups. I only recommend for people who are serious about their fitness or training.

I’ve been coming here for a few years now and I’m a completely different fighter since when I started. Coach really cares about his fighters and these classes are no joke, he will push you to be the best version of yourself that you can possibly be. I highly recommend Underground Boxing, not only will it teach you great boxing skills but it’ll teach you discipline & self-confidence. If you’re looking to just get in shape and lose weight then these are the workouts that you’ll want to be attending! I’m in the process of losing weight and preparing for my second fight all thanks to Coach and Team Underground for pushing me to be great. If I had to describe this gym using one word then it’ll be Family, it’s a great environment and everyone treats each other with great respect within the gym.

I have been attending underground for 3 months now. The coach really cares. He’s passionate, experienced and holds everyone accountable. I have seen results in such little time. If you’re looking to lose quick weight and condition your body while being able to defend yourself, this is the place for you! I recommend underground boxing for everyone.

Best boxing gym in Brooklyn hands down!! The gym is beautiful, clean, spacious with top notch equipment. Coach Ilya will take care of you and focus on your development no matter what level you’re currently at and cares about every individual that steps foot in the gym. If you’re looking to compete, learn self defense or get in great shape I highly recommend stopping by the gym and trying a class!

Great boxing & fitness gym for all ages and all levels. Kid’s program is awesome with focus on discipline . Boxing great for self-defense and weight loss.

Best boxing gym ever. I train there personally,coach is very caring and gives attention to everybody, boxing level at the highest. Really high quality boxing equipment being sold there at the spot. If you're trying to lose weight, sign your kids to a boxing class or even train there by yourself, this is the place. Go sign up!

Excellent boxing gym for my child. The coaches take the time to work with people of all ages and individual lessons are fantastic.

This is the best boxing gym! The trainers are supportive and encouraging. The atmosphere is welcoming. Ilya and Natasha are passionate about teaching boxing and do a great job communicating the proper techniques to every student. Amazing place!

This gym is the real deal. My son and I both come here. He, to the kids group training, and I do private training with Natalia. Besides real boxing skills, the kids learn discipline, perseverance, and respect. Which, in my opinion, a lot of kids are lacking these days. The coaches Ilya and Natalia keep it fun and challenging. My private trainer is Natalia, and she is amazing. She knows what she's doing and teaches it well. I feel stronger, happier, and healthier. I never liked working out, and now I look forward to every session!

My friend brought me here and every time I come I am happy. Trainers are amazing. Everybody is friendly. I lost some weight but most importantly I feel much better. Definitely recommend this place!

This is probably one of very few places that strike a balance between pricing and value. Ilya, the trainer, is not a cater to your liking trainer, but a solid professional mentor for children and adults. If you are a parent, your child will get his/hers, quite a few girls go there, self esteem and confidence boost that will last a lifetime. I witnessed my son's confidence skyrocketed within a year. Thank you Ilya.

Been doing privates with Ilya for a a few months and I’ve learned so much. Every session my technique and fitness improves. I’ve been an athlete my entire life and lift weights frequently and even so - Ilya’s training is very challenging. I’m very thankful to work with him

Great rates for Crossfit and gym. Amazing place to win. Definitely worth it!!

This place is for parents who care about their children, regardless boy or girl. You can meet boys, girls, adult men and women here. Ilya is a solid no nonsense trainer who never ignores a single trainee. Discipline and structure are some of the things your child and you can benefit from at this place. Thumbs up

My 8.5 year old son has been coming here for a month. We live in Long Island and are in Brooklyn only for the summer. We called several boxing gyms prior to signing up here. I felt the costumer service, approach, and rates were far better here then in other places near by. (Plus easy parking, big bonus for us) At first we thought of only coming two or three times per week. However, my son liked the classes so much that we started going all six days. So much so that when he misbehaves he is ok if I take away his iPad but not the boxing classes. He loves the instruction. It’s serious, and yet Natalia and Ilya (the trainers) find an individualized approach to all of the kids. He just had his first few mock sparring sessions and loved it. His confidence is up and we are looking forward to seeing him develop further. I would highly recommend this gym to parents of young kids for helping build confidence, ability, and overall growth for their kids.

Amazing Gym to lose weight and to actually learn how to box. Good sparring, classes, and a clean/organized gym. Coach is the best

Great gym and great coaches! I want additionally mention the personal lessons with a trainer, it's amazing and extremely effective by me. Prices for classes are very affordable and seem to be convenient for most of the people. And btw, I had a huge progress in boxing by starting training personally with the coaches in that gym. It's an honor to be able to train with coaches like Ilya and Natalia, who train boxing stars like Constantin Bejenaru.

Me and my friend have been going to semi privates with Natalia for a couple months now. Natalia makes sure we improve every session and helps us a lot. Her times are really flexible and convenient for me and my friend. Needless to say, we have both improved in the last couple of months dramatically and we look forward to train with Natalia consistently for the next couple of years! Best boxing gym out there

The best boxing gym! Absolutely great working atmosphere. The program at the gym is designed for all levels from novice to professionals. The coach Ilya creates champions!! Love this place!!!

Very nice boxing gym! My husband Jay loves this place.

This is the best gym I have ever experienced! Every time I step into the gym I get a good vibe and a postive mindset. I love the atmosphere, everyone friendly, answered any questions I had. The owner is very nice to me every time I see him. I just want to say hands down the best boxing coach ever! I love the gym because he teaches on so many levels. He’s very honest with us he uses different boxing techniques that help us grow as a boxer. I highly recommend this gym to everyone who wants to take a step into boxing. This gym is great for females & males. I seldom write reviews but just had to write one today!

Wanted to sign my son up and denied him because he is Autistic. Receptionist said the trainers refuse to train him because they didn’t have adequate insurance for a child with special needs. I guess only special needs kids get injured while engaging in contact sport! #discrimination

I love Underground Boxing and miss them dearly. Coach Ilya is by far the best boxing coach I have ever had. He takes great care of all his members and always puts safety first. Not only has he drastically helped develop my boxing skills, but has also served as a support system outside of boxing. Ilya, along with all the other wonderful gym members have pushed me to become stronger physically and mentally. I cannot recommend this gym enough. I wish they could move to D.C. with me!

Gym, is different with different training methods. Overall fun group classes. They have reasonable prices which is the best.

If you’re looking for the best boxing gym in Brooklyn, Underground Gym is for you. Ilya and Natalia will transform you into an athlete. Group classes or private lessons for all ages. You don’t have to worry about boxing equipment, they have high quality boxing gear for sale at their location.

Great gym to join if you want to learn boxing technique and enjoy an intense workout. Friendly environment and a large aesthetic gym to train in.

Its my first time doing contact sport and now Im going to this place for past 3 month. Ilya and Natalia are absolutely amazing coaches and great people. They take time on each trainee and help them to get better, do better and excel. Now I’m preparing already for my first tournament. From no experience at all, I’m going to professional. Says a lot about Underground boxing. Very friendly atmosphere! Thank you guys, for becoming another family for me.

Great place for all, children and adults. Coach is highly professional, enthusiastic and entertaining. Olympic spirit. Greatly outfitted boxing gym. Looking forward to every training session.

I been in a lot of gyms in Brooklyn, this one is most friendly! Couch is amazing , everyone is helping you to get better! Here you can find friends, get in amazing shape and just put your time in a right direction.

Underground is a great place to train. Whether you want to get in better shape, or you're looking for a new way to workout, or you'd like to step into the ring and compete, or you're a seasoned boxer looking for a gym, you owe it to yourself to try out Underground. It's a very welcoming environment for people brand new to the sport. HOWEVER be prepared to WORK HARD. The coaching here will help you to reach whatever your goals are, but you will have to supply the work. The Underground gym environment stresses discipline and accountability, and while it can be demanding, it is extremely rewarding. The gym is clean and well maintained (Underground is NOT a dungeon, like the archetypal boxing gym) with a full-size ring, heavybags, double-end bags, speed bag, free weights, and other training equipment. Good lighting.

My three kids have been training in this boxing gym from 2016. During this time they earned champion titles in different boxing tournaments. I myself have been involved in boxing and I can assure you that coaches Ilya and Natasha are among the best. Coach Ilya is strict, but polite and a true professional. I am very grateful and highly recommend Ilya’s boxing gym especially for those who wish to achieve great results.