The trainers are awesome. Friendly staff. If you want a great workout, this is the place. Everytime I walk in here, I walk out feeling 10 times lighter and stress free. I highly recommend the Muay Thai class for adults and for kids! It's a great workout (Warning: You will sweat a river =P) plus if you're into the fight game, this is the perfect class to get you started. Coach Dino is awesome and he'll keep you on balls of your feet! Literally! =) Also check out the Taebo and Boxing classes as well. I believe they offer Zumba too. You'll love it! read more

Seriously cannot believe the one-star reviews-- yea, yea, you're entitled to yours, but so am I. When I used to live in the area, I would be here every day after work and for tae-bo on saturday mornings. I loved that Denise, AJ, and Cheryl really kick your butt to house/Vegas/EDM style music. I also love the boxing class. The place itself does not look fancy but it is what it is = a kick ass place to get your cardio in along with fighting classes for all ages. I think its great they also hold occasional challenges (most fat loss/most weight loss) and have prizes such as free membership for a period of time, etc. I find it very hard to believe that this gym or any other would charge you for 4 months after the fact-- I canceled mine when I moved and did not experience such an issue. I did however buy the 10-pass class for when I do visit my family on the weekends and can get a cardio workout in. I say try it for yourself. There are all kinds/sorts of people here: thick, thin, young, older, beginners, novice, expert. You'll fit in no matter what shape you are in. read more

ok I went to their open house to check it out.. and IT WAS THEE BEST workout I Ever had! I usually go to 24 fitness but SCREW THAT! (no disrespect) I still go to 24 to use a treadmill or ellipitical but if you're looking for a Challenge, change, or need to step up on the workout scence.. THIS IS THE PLACE TO BE!! Tae-bo, Muay Thai, Kick Boxing, BJJ, TRX- they got it all- AJ and Denise along with staff are WONDERFUL- and VERY helpful. This first week that i've been going I've lost inches and pounds- but to me its not so much about that anymore.. I just LOVE the workout.. haha I can't shut up about it :) Seriously- If you wanna CHANGE- KNUCKLE UP BRINGS IT- AND THEN SUM!! read more

Best group exercise classes nowadays. (comparable to basketball/wrestling practice back in high school). I regularly attend boxing class, sometimes muay thai, and my favorite- TAE BO. Now, when you hear 'tae bo' you may be skeptical like I was but I tried it because it was free.. and boyyy was I surprised. The uptempo loud music gets me in the zone! Sexxytime! Come by, fill out a form, try a class for free. Tell them Sheila sent you. They'll probably hook you up with a good membership deal, since I've referred several people already. No, foreal. Check out their class schedule at www.knuckleuptrainingcenter.com ENJOY! read more

I love this place. The staff is attentive and friendly. Much better than walking in to 24 hour fitness and feeling ignored or your like a bother to assist! The trainers are awesome, the classes are always filled with new moves to challenge you and keep you on your TOES!! Aj Denise and Dino are great trainers!! Go try a class, im sure you'll love it! read more

I have been going to see Denise since June and I have to say she does a great job. She is very motivational, encouraging and inspiring! I am not in the best shape but with Denise's help I have slowly been losing weight and gaining strength through the intense 30 minute sessions we have about twice a month or more if schedule allows me to. I really look forward to them now. It's hard in the beginning but I have learned a lot and what I am capable of doing. Thanks Denise!!! read more

Love this gym! Great trainers friendly people! Trainers wil kick your a**! If you want a good workout come to knuckle up! read more

I've called for weeks now ... I was so motivated to start the programs you guys offer. Read your reviews and was super pumped BUT I can not get a hold of any one ?!? I've called, texted and even drove by. I'm very disappointed With the lack of communication you guys provide .... will you ever be open ?? read more

Knuckle Up is the very first gym I've ever stepped foot into, and I've never turned back. Being a non-athletic person jumping into any type of fitness workout was, of course, scary. But as soon as I tried out a class I never felt more welcomed. From self defense to cardio Knuckle up has a wide range of classes that appeal to the entire family! My suggestion would be to just try it out, because you'll be signing up for more than just a mere membership. You're signing up for satisfaction in ones self, wellness in the mind and body, and results. read more

Knuckle Up Training Center - Dance parties / workouts in our cardio classes every night! - Martial Arts Near Me - Vallejo, California

See all

The Kickboxing might be good, but this is truly the worst run business I have dealt with in years. You can't run a business on "good vibrations." We tried to cancel our membership in September, it's January and they are still charging us. It's like some horrible joke, that you can't believe is true. After a bad Yelp review, and a BBB complaint they agreed to refund us for all these months, but no check yet, and we JUST GOT CHARGED AGAIN for January. Their excuse was oh we forgot. That doesn't fly for a business. If all the customers just forgot to pay for their gym fee, Knuckle up wouldn't be in business very long. I'm glad to see this one star review is dropping them from a five star business, as any business with the customer service they have displayed should not be considered 5 stars. read more

So far I've been going to this gym for a year and have lost almost 30 lbs. like everyone else has said, the workouts kick your a$$ but are fun! The trainers are great and keep you motivated! My kids love the muay Thai classes! All around great gym! read more

Denise cannot go on another vacation. She came back from vacation with a vengeance! Tonight's class was crazy. She got me working so hard, I thought my knees were going to buckle and my arms were going to fall off! It's a love hate relationship, but honestly more love than hate. What can I say, I guess I'm a masochist. read more

This place is home to me! The trainers really care about their clients and members. You won't find any gym like this in the bay area. The classes they offer can really help you meet your goals quick, and always with great music! read more

I am so upset on how this place is, they took money out of my account even after serving 2 letters 3 months in advance on cancelling my membership. Manager is a joke and not helpful. Alot of excuses from this place. Update: after opening a small claims at the Solano court house, served papers to manager, he made contact and gave me a full refund. read more

This gym has become one of the most memorable fitness community ive ever been a part of (and i have a fair share) Aj and Cheryl truly care about you and your goals and there is no feelings of judgement to be found!!! All the staff and members have become people I would call my friends! They are very motivating, positive, and personable. I have even recruited people to this gym who have thanked me for introducing them to Knuckle Up. They even take part in group activities like: spartan races, races/runs, and any fun athletic competition going on! The sense of comradery here has made me never want to leave!!! I would give this place more stars if I could! read more

Knuckle Up is one of the best things to come into my life in 2014. I wish I knew about this gym earlier but so glad I do now. The instructors at KU are motivating and inspiring folks and really down to earth. I highly recommend trying Cheryl's TRX or Tae Bo classes and AJ's cardio & Tae Bo classes as well! Music is always on point too! The other day, AJ had some Public Enemy bumping during sculpting which set the tone. The cool thing about this place is that it feels like a real fitness community. Humbled to be surrounded by a lot of fierce women and men! read more

I miss this place! AJ sold me on training to loose weight and a couple weeks in I fell in love with the sport! San Francisco has no place that comes close to knuckle up! I didn't once feel uncomfortable when I started jujitsu even though I had no idea what I was doing when I started. 5 stars hands down! read more

I just had the single best work out EVER!! Thank you knuckle up!! I WILL be back!!

KUTC is the absolute best workout you will ever find. From Tae Bo to Kickboxing to Sculpting AJ and Denise will push you as hard as they can to maximize your workout and get you in the best shape of your life. They are both very caring and inspiring. The demographic of this training center is dynamic. You will see people from all walks of life working out together - from the top notch hardboy to the offbeat newcomer - there is something for everyone and never a reason to feel out of place or intimidated. KUTC changed my life. I went from a size 14 to a size 6 in one year. I had never puched a punching bag or kicked anything in my life. It is addictive, fun and rewarding. Don't take my word for it check it out for yourself! read more

The Knuckle Up trainers, classes and bootcamps are the best all around. I get an awesome workout everytime. I love the Sculpt, TRX, Tae Bo & Beat Down classes as well as the 60/90 day MaxOut Elite Bootcamps (which is my ultimate favorite! I have gained energy, stamina, strength, and lost weight with this program). Coaches AJ & Cheryl have made it their passion and dedication to ensure their members attain their best fitness goals. I've joined other fitness clubs, but none of them don't come close to the awesome way I feel when I finish my workouts at Knuckle Up. The staff and fitness programs are all exceptional! Come check them out... read more

I've been going here for the past week for tae-bo and i absolutely love it. Trainers and staff are super helpful and friendly- they give you advice to how to reach your goal etc. AJ & DENISE = AMAZING. They make the workout 10X more enjoyable. I get a good workout from the classes, and plus if your still not sure if this is the place for you, they offer free trails of each class on your first time :) Highly recommended. read more

Best place ever! I had to leave in November because I found out I was a high risk pregnancy. As I had an emergency c- section and only 8 weeks after the surgery I'm just counting down when I'll be able to go back. Classes are AMAZING, Denise,Cheryl, and AJ really take care of the individual in a group setting. The music really gets you motivated. This is a hole in the wall business, if you want to pay to get your butt whooped then this is the place to go. read more

This place rocks!!! If you want to work and sweat your butt off, this is it!! You will leave here like you have accomplished something for sure!! Been coming for a few months now, love all the people that work here! Denise & AJ are kick ass trainers!! I'm so disappointed in myself that I didn't join years ago!!! read more

Gym is very primitive. Smells awfully bad but I thought I'd give it a try because of a friend. I joined and was proceeded to be overcharged on my account. These people are scammers folks. It's not worth it. Sign up for a real gym. read more

Looking to get back in shape, stop by Knuckle Up. Guarantee you won't be disappointed. Young, old, men, women, kids....this is a place for all. There is something for everyBODY. I've been a member since October 2007, and have gone down from a size 6 to a size 4. If you love to work out and love a challenge, the TaeBo class will definately challenge you. On Thursday's we have throw back TaeBo, disco lights and all. The first hour is hard core TaeBo workout, last 30 mins. is FUN, FUN, FUN. Not only do you get a good workout, but for those who love to dance, AJ adds a little hip hop -- Thursday is the day to come. SEE U THERE!!! read more

This gym is the best! Every time I go, I get my butt kicked no matter what type of training it is. The trainers keep you motivated, are encouraging, keep the music danceable, and always challenge you! I've done p90x, insanity, chaLean, etc etc... I'm always looking for a good workout and this is definitely a really great one. They also keep their classes interesting. There is a wide mix of cardio, body sculpting, and all levels of MMA. Fun fun fun! read more

Great place for a great workout. Lots of variety. Boxing, Muay Thai, Tae Bo, weights, Zumba, personal training.... AJ & Denise work your butt off. read more

for real results and real good workout this is the one place to go to! the trainers here are VERY helpful and they have a lot of different kinds of classes and "programs" for EVERYONE! they dont judge you like other places and really make sure to help you in every way possible! i love it! read more

came here one weekend after heffing out...I normally work out at another kickboxing gym...but needed to get it in cause of some bad food I wanted to burn off. my cousin Cheryl hooked me up and kicked my butt. wouldn't mind working out here on the weekends...I'll probably be back for Saturday morning cardio! read more

seriously. this is the best training camp i have experienced. they are friendly. NO EGO going around unlike some camps ill retrain from mentioning. great cardio workout. im in this place three days a week. and i feel great. i highly recommend this place. instructors are informative and very involve in training you. stop by and check it out read more