Outdoor and Remote Training

Your immune system is our #1 priority

The Firm SF

Change Your Life

Welcome to The Firm Fitness

Sometimes there are just not enough hours in the day to take care of yourself. With work, family and social engagements, how do you make time for lifting weights, cardio, stretching, shopping right and preparing healthy meals?
We are here to help!  All you have to do is show up and we take care of the rest. We will take you through a comprehensive assessment and goal strategy session. Your workout will be designed by one of our nationally certified instructors and will be customized for your fitness objectives.  We will make obtaining the body and fitness goals you want more efficient, so you can get more out of life.


Our Fitness Services

Jumpstart Your Health

Getting in shape shouldn’t be a punishment. It’s an amazing and empowering lifestyle decision that anyone can achieve. We believe in finding the pleasurable side of fitness, and while there may be a sore muscle or two along the way, the amount of fun and levels of energy you will experience will far exceed the discomfort.

Semi-Private Training

Feel Good, Look Good

Get all the benefits of having a personal trainer at under half the cost by working out in small groups of 1-4 people.  Each workout is tailored to your goals and needs, and every 6-8 weeks we do a reassessment and you receive a new workout.  This allows our members to continue to make progress, and stops the boredom that can occur from doing the same stale workout each week.


Group Fitness Classes

Strength & Stamina

Included in all of our memberships are our highly effective and energetic group training classes. Our classes are about team spirit and motivation. These are the perfect supplement to our semi private training sessions. This is where our members focus on their cardio and reinforce the Core Fundamental Movements.  Get your metabolism fired up with one of our instructors and our unique training equipment including: sand bags, kettlebells, sleds, battle ropes, TRX and medicine balls.

Kids Conditioning

Core Strength & Injury Prevention

Our Kids Conditioning Classes provide a safe and fun way for your video gamer to your college athlete to workout.  Our focus is on injury prevention, conditioning, building core strength and stability, and most importantly, fun!  With more kids specializing in a sport at an early age it is important to help them build the strength and stability to prevent injuries.  For the younger kids we provide a fun and challenging environment for them to learn core fundamental movements through different challenges and activities while allowing each young athlete to work at their own individual level. Exercise at a young age builds good fitness habits and can enhance cognitive function which can carry over to their school education.
For our young adult athletes, building power and strength must be achieved with an emphasis on stability and mobility. In order to prevent injury, teenage athletes have to be careful not to develop strength on top of disfunction.  Learning correct movement patterns and proper body mechanics is crucial for the sport specific athlete.

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Nutritional Counseling

Start from the Inside Out

Your relationship with food can improve your lifestyle, weight management, and overall fitness and performance.  
Whatever your specific or individual goals, our objective is your success in achieving them through our customized programs based on the science of proper nutrition.

Whatever your fitness needs, We're here to bring you results. Contact us for more details.


JJ Miller

The Veteran

JJ Miller obtained his B.S. in Kinesiology from the University of Texas. He is a certified personal trainer through the American College of Sports Medicine as well as a Certified Functional Strength Coach. He has been a personal trainer for nearly 25 years. During that time he has worked with an extensive client demographic, including young aspiring athletes, post physical therapy patients, pre- and post-natal moms and weekend warriors. He has been working with clients in San Francisco since 1997.  Along with his wife, Andrea Miller, he founded The Firm in order to provide clients with a support team dedicated to helping them make a healthy lifestyle easier and more enjoyable.


Andrea Miller

The Woman Behind the Curtain

Andrea Miller has run health clubs for over 20 years, and has redefined what it means to "lift like a girl."  She is a big believer in building comradery and community within the club. She is the mother of three very active kids and is highly involved in their schools. She understands what it means to be a mother in San Francisco. She knows that life can get a bit hectic and the importance of getting some time for yourself to workout.  Along with her husband, J.J. Miller, she founded The Firm to create a friendly, social environment to stay fit and have fun doing it.

Melissa graduated with her B.A. in Exercise and Sports Science and M.A. in Sports Management from the University of San Francisco. Additionally, she is a Certified Strength and Conditioning Specialist with NSCA. Melissa is currently the Fitness Coordinator at the Recreational Sports Department at USF. Previously, Melissa worked as a strength coach at City College of San Francisco primarily working with football, women’s/ men’s basketball, baseball, volleyball and track and field. She was also a personal trainer and group exercise instructor at several gyms throughout SF the past 7 years. In addition to personal training and sports performance, Melissa was an assistant coach for the Rugby Club at USF. Melissa’s passion for sports and fitness stems from playing sports her whole life including rugby and recreational BJJ in college. Melissa’s efforts leave a lasting and positive impact with those she trains and coaches as she empowers them to achieve their own goals. 


Omar Prieto

The Happy Masochist

Omar has been a certified personal trainer for 6 years.  His experience began when he decided to take control of his health and well being.  "I lost 100lbs 5 years ago by exercising and eating healthy, and I have helped others achieve the same."  Omar's ultimate goal is to inspire others to change their lives through fitness.  His expertise in cardiovascular, core and strength training as well as being a life coach has given his clients proven results.  When Omar is not motivating clients inside the gym, he is outdoors hiking and rollerblading.  He also competes at the elite level in obstacle Spartan Races.

Justyna Sproull

The Ringer

Justyna has always had a passion for athletics and exercise.  While growing up in Poland, she was active in volleyball, basketball, and swimming, as well as table tennis, which she played at the semi-professional level.  Justyna received both her MS and PhD in Health, Exercise and Kinesiology Science from the University of Physical Education in Krakow.  She has excelled as a group fitness instructor, swim coach, and mobility specialist.  She also has her CFSC certification as a Functional Strength Coach.  Her care-free attitude and endearing optimism always create a fun and engaging atmosphere which promote a positive environment for her clients to reach their goals.  Justyna spends her time outside of the gym hiking, drawing, and adventuring around the world.


Shannon Morse

The Diet Doc

Shannon’s interest, desire and personal commitment to educating and developing the potential in her clients through physical fitness stems from her belief that the body has endless possibilities when fueled and treated properly. Her journey began over a decade ago when, after she sustained a severe concussion, she was introduced to Pilates as a form of physical therapy and rehab. This led Shannon into the field of personal training at both the group and individual levels. The core of the curriculum focused on coaching others toward achieving their personal goals and becoming the best versions of themselves – physically and mentally – through a solid understanding of the human body, how it functions and the optimum methods to maximize its performance in daily use. This eventually led Shannon to the importance of diet and nutrition in the entire fitness equation. She came to realize that nutrition was the key to unlocking the body’s true potential when combined with a proper training program. In 2014, she became a licensed Diet Doc Permanent Weight Loss Program clinician. The addition of the Diet Doc Program allowed her to expand her knowledge and provide additional services for her clients.

Chris Villa

The Up and Comer

Christopher Villa is currently a senior at Abraham Lincoln High School.  He started weightlifting competitively in 8th grade and soon fell in love with the training aspect of fitness.  He has participated in a variety of sports such as football, wrestling, tennis, and track.  He plans to study exercise science in college and hopefully open up his own gym one day.


“Great things are done by a series of small things brought together”

Vincent Van Gogh

Contact Us

Just fill out the following information to get started!



225 Frederick St, San Francisco, CA 94117, USA



(415) 682-9135

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