C3 Athletics in Stamford is Connecticut’s Premier Fitness and Martial Arts Training Center. We have a competition quality ring, plenty of heavy bags and a wide array of specialty training apparatus. C3 Athletics is a facility where old school training and hard work meets modern training equipment and facilities, and offer instruction in Brazilian Jiu-Jitsu, Muay Thai, Boxing and Mixed Martial Arts. C3 Athletics is registered with USA Boxing and USMTA (United states Muay Thai Association).

We were established in January 2010. The people who put the gym together come from gyms all over the world and wanted to put the best of what they have experienced together in one place. Everyone at C3 Athletics are committed to providing top quality training in a clean, friendly and safe environment.


  • C3 Athletics says:

    C3 Athletics is a fairly new MMA gym in Stamford, CT. I really like them. They have boxing classes, brazilian jiu jitsu and muay thai classes. I would absolutely recommend them to a friend.

  • Jeffrey says:

    Did a trial class there. Its just like the gym not alot of structure or Discipline

  • Sean says:

    I have been a member from the very start of C3, I have to say there is a lot structure and discipline. If I remember correctly the Thai boxing team is 10-1 on the year and the BJJ team under 3rd degree black belt Cesar has won or placed in 4-5 competitions this year. If its structure your looking for try a BJJ class.

  • Bill says:

    I can proudly say that I am one of C3’s original members and am excited for the approaching 1 year anniversary (June 11, 2011). Being one of the original members, I’ve seen the place grow and start to find it’s identity. I came to C3 having had trained brazilian jiu jitsu and muay thai previously, so I had certain criteria that I was looking for in a gym to train. I wanted a gym with knowledgeable instructors, check, clean and with great equipment, check, a great atmosphere, check, a place where I could be part of a team, check, and all at a reasonable cost, double check! The members at C3 are treated like members of a club, not just clients paying dues and the owners take the feedback from the members seriously and reinvest in the club to make it better. While C3 is a new MMA gym, it’s already been a successful gym. Earlier this year, we had 7 fighters compete on an amateur fight card on Long Island and left with a 6-1 record. The brazilian jiu jitsu program keeps getting more and more competitive and it’s not uncommon to see 2 or more black belts on the mats. The program is lead by a 3rd degree black belt from Brazil who has great enthusiasm, energy, and a wealth of experience. Training at C3 is a pleasure and there are so many available classes that it’s crazy. It’s a good group of people who get along both in the gym and outside. So come on down and try a class. I’ll be looking for you.

  • Karin from C3 Athletics says:

    By your description it sounds like you tried one of our cardio bag classes for your free trial class. We have an MMA part and a fitness part at our gym. Our Muay Thai, BJJ and boxing classes are where you will get technical instruction and properly learn each discipline. The cardio bag classes are designed to give a great workout and burn maximum number of calories in a little less than an hour.

    Please contact us at 203 588 9542 to schedule a new absolutely free trial class in either Muay Thai, jiu-jitsu or boxing and please make sure to let the person scheduling your class know which discipline you are interested in trying.


    Karin George

    C3 Athletics

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