About The Gym
A Foundation of Strength. A Family of Support.
Jim Thompson opened our doors in Billings, Montana, back in 2007 with a simple premise: fitness should be empowering, not intimidating. Whether you are stepping up to a barbell for the first time or breaking a new personal record, you belong here. We combine a massive range of modalities - from heavy kettlebells to machines - with a fiercely supportive culture that truly feels like family. At Thompson Fitness, we don't just train bodies; we perfect technique, build confidence, and foster a community that champions your success.
About The Founder
Jim Thompson
Founder & Coach
Jim Thompson didn't start at the top; he built his strength from the ground up. Discovering his passion for fitness in college, Jim used the iron to forge not just physical power, but unwavering confidence. That relentless dedication took him to the global stage, where he placed third in the world as a competitive powerlifter in 2003. Through decades of elite-level training and firsthand experience overcoming his own injuries, Jim developed a profound, mechanical understanding of exactly what the human body is capable of achieving.
For Jim, the ultimate victory has never been his own personal records—it is translating his knowledge into life-changing results for his clients. For over 33 years (with his very first client still training strong today!), he has coached everyone from aspiring athletes and rodeo competitors to everyday people looking to reclaim their health. As an extensively certified trainer, Jim is deeply committed to continuous education, ensuring he always brings the best, most updated techniques to the floor. His dedication to service extends far beyond the gym: he is the Montana State Chairman of the American Powerlifting Organization (APO) and serves on the Board of Directors for The Mark Divine Courage Foundation, supporting veterans battling PTS.
Guided by the words of his mentor, Navy SEAL Rob Ord, Jim’s philosophy is simple:
"Everything is training."
Whether he is learning a new modality or guiding you through a tough set, Jim approaches every single day as an opportunity to help you become your absolute best self.
Real People. Real Results.
See what our clients have to say about us.
Jay B.
Met Jim at my first powerlifting meet 20 years ago. He knows and practices what he teaches. I travel 140 miles one way to train with Jim. I have trained with him for 20 years and could not think about training with anyone else. Jim is humble and honest. He took me from a 1,200 lb total and I expect to hit a 1,500 total next year. I am 68 and he does not coddle me. Whether you are powerlifting, trying to lose weight, conditioning for a specific sport, regain your youthful strength, I could not think of a better coach. Thank you Jim.
May 27, 2026
Tom F.
Jim Thompson has been my personal trainer for over 25 years! I credit Jim's guidance and encouragement in the weight room for the physical strength and overall physical health that I enjoy at the age of 71.
Jim is constantly challenging us to go beyond what we would ever believe we could accomplish on our own!
The other amazing thing about Jim is that he is constantly researching and developing techniques that benefit our workouts! He studies the science behind the exercises that he has us do!
I highly recommend Jim Thompson as a trainer. Just be prepared to be challenged and transformed into the best shape of your life!
Feb 23, 2026
Dean C.
I've known Jim for many many years. A friend of mine started going to his gym for personal training and recommended that I check it out. I started a couple years ago at the age of 64. I've had multiple shoulder surgeries and some other injuries. Jim did an excellent job of modifying some of the workouts for the needs relating to my injuries. He's very knowledgeable and takes a personal interest in each of his clients. I highly recommend Jim Thompson if you're looking for a more personalized workout experience.
Sep 6, 2025
Wayne S.
Tough as nails! Trust me, this is the person you want training you! Not to mention by far the best value. Jim has more combined knowledge and experience than any 5 or 10 trainers in our area. This is due to his continued dedication and commitment to providing the most advanced functional training possible. This has led him to invest in working with other training experts from across our country and others. It’s also handy having close to the equivalent to a physical therapist at your disposal. THIS IS FAITH AND RESULTS DRIVEN! Check your ego and vanity at the door and be prepared to work!!!
Wayne S. 12 year member
Feb 8, 2026
Linda B.
I have trained and worked out with Jim for 33 years! He has helped rehab me through many surgeries and holds me accountable on my health and wellness journey. He will always be a part of my life as a friend and mentor. I have so much respect for him! I recommend him to everyone!
Linda