One of the greatest boxing gyms in the greater Bay Area. Old school boxing, with old-school boxing…read morerules. A true boxers, paradise.

Old-school boxing gym…read more I read about this place in the 3/23/25 SF Chronicle newspaper and went to buy a t-shirt for a friend who is a long-time boxing aficionado. Located in a short cul de sac next to the frontage road just east of highway 880. Parking was haphazard. Was greeted by Celeste King, who owns and operates the gym now. Inside it's like a scene out of a boxing movie, old school and serious business. There's an elevated ring where two boxers were sparring, guys skipping rope, hitting the heavy & speed bags. Hundreds of posters and photos adorn the walls and ceilings, including ones that proclaim this the home of Andre Ward! I bought a t-shirt with their logo for a very reasonable $20. When my buddy visits me again I'll bring him here, he'll luv it no doubt.

I've been to 6 Saturday 10a Cardio & Boxing classes over the last few months. Every week the room…read morehas good energy and a supportive environment. Given it was my first time boxing, I was a little intimidated (trying something new is always so for me, especially new athletic endeavors), but Moussie made it approachable and was welcoming. I keep coming back and I am feeling stronger! Btw... everyone seems to come in at 10 or a few minutes after- a few mins late start it seems.

Attended this past Saturday strength & conditionally boxing class with Trainer OT and it was…read moreamazing . The trainer OT was high energy , positive and very encouraging to myself as well as other people in the class . He continues to push us in a very positive manner . I look forward to attending another class . I also been doing personal training with the owner Miguel Lopez and he is also very high energy and knowledgeable of what to work on to get the results I'm looking for . If you looking for a boxing gym with very high energy trainers I recommend attending boxing for health !

This is a great gym to get started at! The classes are well structured and so much fun! They have a…read moregreat playlist and keep you moving. I like how Coach Bryon teaches. He keeps you engaged and checks on you throughout class to help with form. Everyone is very encouraging there! They also offer varieties of classes from kickboxing, boxing, and more! They have several classes throughout the day too, so anything can fit into your schedule. This is a great gym for everyone, no matter what level you are at!

Love this place! My husband and I have been trying to make it a habit to come once a week and we…read moretake classes with either Byron or Ron as the instructors. I love how inclusive, lively and friendly it is to all fitness levels. It is great to see a small fitness community within this establishment. We think it's a wonderful workout and a great way to sweat out any stress we have during our day. We reccomend this place to our friends and try to make it a group workout by inviting them when we go too.

I've trained at quite a few Muay Thai gyms over the years. Like a lot of people who move around,…read moreI've bounced from city to city and tried different spots. Most of them were solid. Good people, good workouts. But Jay's Training Grounds was the first place where things actually clicked for me. What stood out immediately was the way Coach Jay teaches. Instead of just drilling combinations, he breaks down the fundamentals and the reason behind every movement. Footwork, balance, timing, defense, how punches connect with kicks, when to check, when to counter. You start to understand the system instead of just memorizing techniques. That made a huge difference in how fast I improved. The atmosphere is also very genuine. No ego, no intimidation. Just people who want to train hard and get better. Beginners get clear guidance, and more experienced fighters still get technical details that sharpen their game. It feels like an authentic Muay Thai training environment, not a cardio kickboxing class. If you're in the Bay Area and looking for a place to train seriously while still feeling welcome, Jay's Training Grounds is worth checking out. Drop in for a class, talk to the coaches, and see it for yourself. You'll know pretty quickly why so many people stick around.

My Muay Thai journey started back in 2014, and from 2014-2018 I was fully committed to training…read moreuntil life hit me with school, work, and relationships that forced me to step away. During that time, I gained a lot of weight and felt like I lost a big part of myself. When I tried to come back, I found that the gym where I originally started had closed due to rising rent costs. I checked out a few gyms in Oakland, but none of them had that same community vibe where people truly enjoyed Muay Thai for the art and what it represents, I didn't feel welcomed Honestly, I felt lost and thought I'd never find that feeling again. I even considered driving far just to train because I missed Muay Thai so much. That all changed when I came across Coach Jay's bio and saw that he had trained under the same coaches I had when I first started. I looked at the photos, saw the location, and instantly felt the same vibe I'd been searching for. From day one, Coach Jay was welcoming, helped me get my technique back, and I immediately felt the support from the entire team. Since rejoining, I've gone from 260lbs to 210lbs, building muscle along the way thanks to the strength and conditioning classes (something I never had access to before). On top of that, I've been training in boxing, improving and learning a lot, while of course continuing with Muay Thai. I've even competed in a PKB and plan to keep competing in the near future. For me, Muay Thai and boxing here have not only helped me get in shape but also pushed me to grow mentally, physically, and spiritually. The training is tough but motivating, and the team always makes you feel supported like family. Everyone trains hard, but there's also real camaraderie and respect. This gym has given me opportunities to challenge myself in ways I never imagined, from sharpening my technique to stepping into the ring. It's more than just a gym, it's a community that keeps you accountable and pushes you to become the best version of yourself. I'm incredibly grateful to Coach Jay and the gym for helping me return to what I love and for improving my health. If you're serious about training or even just curious to try something new, I can't recommend Jay's Training Grounds enough. - Manny

Kris Lopez is the best boxing trainer in the Bay Area hands down, I've known and trained with him…read moreover the years since I was 19. Whether you're trying to go Pro or just better yourself overall in life, he's the guy that you want to be under for guidance and training. 10/10

Love the family oriented vibes! Pilar in the community! Kris the owner has expertise & decades of…read moreexperience. Highly recommend

My son loved going here for his training the other kids welcomed him and showed him a some stances…read moreand the trainer was very helpful and would do a one on one with the kids. If we still lived in the bay we would definitely still have him go.

I've been training at the kennel for a little over a year now, and I can say it's one of the best…read moredecisions I've made. Coach Arvin is great at what he does. He doesn't just show up to run a class. He truly wants to see you improve, pushes you to your limits, and isn't afraid to call you out when you're not giving your best. I also attended the strength and conditioning classes with Coach Paul, and I highly recommend it. His sessions are well-structured, challenging, and designed to build real, functional strength that complements boxing training perfectly. On top of all that, the front staff is great -- always friendly, welcoming, and super helpful with any questions or scheduling needs. Whether you're just starting out or looking to level up your training, this gym offers everything you need with the right people to back it up.

I love this 9round in Emeryville! I can't believe it's already been almost 2 yrs since I've been…read moregoing here. Feels like just yesterday that I was scrolling through Yelp looking at workout studio reviews! I had never boxed before 9round, and I love it! It feels so great to just punch a bag after a stressful day at work. You feel so powerful! I also love the way that the workouts are structured. I can just pop in at any time and be in and out in 30 mins. I don't need to think about what moves to do for the day. And I always leave super sweaty and accomplished. What really stands out to me about the 9round in Emeryville in particular is the owner Charise! I knew when I was first searching for workout classes that I wanted a badass woman trainer and Charise is just that! She is amazing - super friendly and motivating! She is great at demoing different moves for noobs like me who can never remember the names of different moves. She also takes the time to chat with and get to know everyone!

Charise is amazing!! It was my first time at the studio, and she was so welcoming and sweet and…read morehelpful. She demoed all the moves for me before each round and helped correct my form as a newbie. She was extremely patient and helped me work on my technique when kickboxing. I liked the combo of HIIT and kickboxing. It was a very welcoming environment and the location had easy parking and very easy to find. I definitely recommend coming!!

Ulises is everything you want in a trainer. He pushes your boundaries and when you think you can't…read morego any further, you can. With his previous boxing career and abundance of knowledge, he'll not only teach you the fundamentals of boxing, but applies it to real life fighting situations. He explains why you block a certain way then throw a certain punch or combo. There's never a dull moment whether it be in his group classes or private sessions. He'll keep you working but smiling at the same time. His skill, knowledge and patience are the perfect trifecta for a great trainer. You don't want to sleep on him! Contact him today and get your body right!

Ulises helped me train for the Masters Boxing tournament. At 42, he got me in the best shape of my…read morelife and helped me develop my boxing skills. He's an encouraging positive trainer that motivates you every single training session to keep going. He helped me go past what I thought were my limits. He developed a program that helped me work on strength, speed, quickness, and endurance. He's also a lot of fun to be around making training sessions enjoyable. I'll definitely be booking more sessions with Ulises!