Home of CrossFit Williamsburg

About Marmon Muscle

Marmon Muscle is the home of CrossFit Williamsburg and conveniently located in the Williamsburg Indoor Sports Complex (WISC). We are Williamsburg's oldest CrossFit facility, and a dedicated member of the holistic health of our community. Since 2010, Marmon Muscle has prided itself on offering a truly unique experience in which our members are inspired to add strength and flexibility to their life–in and out of the gym. In addition to our rich daily schedule of classes, Marmon Muscle hosts a variety of specialty programs designed to nourish body and spirit.

We proudly staff a professional team of experienced CrossFit-certified coaches, ensuring that your experience is guided by a team dedicated to your health and safety. Marmon Muscle welcomes people from all levels, from beginners right through our seasoned veterans.

Our Coaches

David Marmon - President / Owner / Head Coach
Britta Marmon - Assistant Coach
Michelle Massie - Assistant Coach 
Catherine Law - Assistant Coach
Tom Toothaker - Assistant Coach
Stephanie Toothaker - Assistant Coach
Iwona Kakareko - Assistant Coach
Ellen Womeldorf - Assistant Coach
View all Coaches Information

Why Marmon Muscle?

  • Over 50 years of combined Coaching Experience

  • 10,000 sq. ft. Workout Facilities

  • Gender Specific Bathrooms & Showers

  • Year round Heating and Air Conditioning

  • Open 7 days a week (limited weekend hours)

  • WODs offered 5 times a day Monday - Friday

  • Max 1 Coach to 20 Athletes (Average 1:10 Ratio)

  • Custom fitness programs available
  • Specialty Courses/Workshops available

Information for Drop-ins


We LOVE out-of-town guests at CrossFit Williamsburg.

Below are a list of expectations for drop-ins.

  • You must be an experienced CrossFit athlete that currently trains at a CrossFit affiliate (or has completed an On Ramp/101 program at a CrossFit affiliate).
  • You can participate in one of our classes, work privately with one of our coaches, or we offer OPEN GYM hours.
  • You need to create a profile and make a reservation online for the class that you plan to attend. Please do not show up unannounced.

Thank you and welcome!

Our Facilities


"Despite the denial, I knew things officially went south when I picked up the Miss America wave. It was timid, close to the chest, and most importantly, prevented any swing from my now flabby arms. The once formidable Army officer was now an out-of-shape, mother-of-three, slipper shuffler. I had lost my strength both physically and mentally. After two years of saying I was working out (1-2 runs a week), I finally realized I had to change my routine so I wrote Britta to ask about CrossFit 101. I was a disaster in the gym, from poor mobility to awkward movements, and was lucky if I lifted the bar; however, every coach cheered for me as though they recognized the heart I had. It was the beginning of a transformation. Once I hit a wall, I signed up for individualized training. After just over a year of CrossFit classes and one-on-one sessions with David, I have competed in four competitions, increased over 50% in all my lift capacity, and will wave to you like I am guiding in a 747. I still shuffle around my home office, but now it’s in Reebok Nanos as I get ready to set another personal record at CrossFit Williamsburg."
- Christine Obadal

"Several weeks ago David asked me to write a testimonial about my experience working with him. This was a simple enough request, but I’ve found it difficult to summarize in a few short paragraphs what led me to work with him and, more importantly, how impactful the experience has been.

My story begins in my teens with a nasty football injury that left my collarbone fractured in several places, a fracture in my scapula and torn tendons and ligaments. If this wasn’t bad enough the injury ultimately evolved into a rare condition dissolving the bone instead of repairing it. After months of treatment, a couple of surgeries and more months of rehab I was as good as I was going to get. End result was one less collarbone, a pieced together scapula and limited range of motion. My doctor at the time advised against heavy weight training and recommended running and swimming for conditioning. As a three sport athlete (baseball, football, basketball) this was hard to hear and like most young men I ignored him. The result was several separated shoulders, but I quickly figured out what I could and couldn’t still accomplish as an athlete and I remained fairly fit and with most of the strength back in my shoulder into my late twenties.

Once I hit my early thirties my fitness level began to fall off. I had two young children, lots of bills, a demanding job, a working wife and not enough hours in the day to workout (at least that’s what I told myself). The end result was I extra pounds and, more depressingly, loss of some of the range of motion and strength I was so determined to get back in my shoulder. This continued for several years with lots of failed attempts on my own to regain the health and fitness I was quickly losing. I realized I needed help.

I found David before Crossfit Williamsburg and Marmon Muscle. He was working with several other trainers at a facility and I found myself quickly gravitating and scheduling most of my sessions with him. I liked the way he took my training seriously, how he wouldn’t let me give up on myself, how he never accepted that there was things I might not be able to do because of my past injury and how he pushed me. Until you’ve worked with David you will never understand the significance of the last sentence. The end result almost eight years later is I’m stronger than I was when I as in my twenties, I’ve got the greatest range of motion I’ve ever had in my shoulder and I’m in good shape as I write this. I also recognize that I could be better and that working on this will never be over.

If you’re reading this thinking you need to do something you probably do. I see far too many individuals (dads, moms, professionals) my age (40’s) walking around significantly out of shape and unhealthy. I hear all the excuses from these people (I’m too busy, it’s too hard, I have an injury, I’m too old) and I hope by reading this you start to realize those are all excuses. You can do this, you’re not too old, or busy and don’t talk to me about being injured. There are two things that are keeping you from entering those doors, Fear and Ego. If you can find it in yourself to put those aside you will be amazed at what you can become.

David has become more than a trainer he is a trusted friend whom I cannot thank enough for continuing to not let me fail."
- Mike Van Sickel

"I vividly remember limping into Marmon Muscle in April 2011, a 40-something former college athlete with physical limitations stemming from a spinal surgery ten years prior. I must have walked past the facility a couple dozen times before deciding to introduce myself and once I did David knew right away that he could help me. As of Marmon Muscle’s Grand Re-Opening into their expanded facility in February 2015, David will have been patiently upping the ante on me for 4 years - tapping into my competitive spirit and varying our workouts in creative and productive ways that have helped me accomplish milestones that my doctors said were unattainable. The training hasn’t been easy, but it has been life-changing and I’d recommend Marmon Muscle to anyone willing to make that investment."
- John Gordy

"I started training with David Marmon in March 2014 with the goal of regaining strength and improving my conditioning after bilateral hip replacement. My experience has been 100% positive, and my only regret is that I did not start working with him much earlier. David is a professional in every sense of that word. He programs and supervises every session to insure that I maintain steady progress and understand how each lift, movement, or conditioning exercise helps me achieve my fitness goals. David takes his clients success personally. His commitment to his profession is evident in his educational background, his instruction, and the impressive team of coaches at Marmon Muscle/Crossfit Williamsburg. David, his wife Britta, and their team treat their athletes and athletic community like family, and they strive to make both better every day. If you want to train with the best in a fun, supportive environment, this is the place for you."
- Luke Beckerdite
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