Sonja is the owner of Demco Fitness. She works with a wide range of clients. From young athletes, to general population, to yogis, to cyclists, to athletes with sport specific goals, to her mother. Sonja helps members meet their goals, along with teaching them the tools to live a healthy and happy lifestyle.
Every single person is different. From different goals, to different bodies, to different abilities. Training programs are catered to individual needs for each member. No matter who you are, what injuries you may have, or the goals you want to reach, Sonja has the knowledge, expertise and principles to apply to you.
Every single person is different. From different goals, to different bodies, to different abilities. Training programs are catered to individual needs for each member. No matter who you are, what injuries you may have, or the goals you want to reach, Sonja has the knowledge, expertise and principles to apply to you.
Services
Check out our at home workouts that can be done outside of the gym with no to little equipment. If you are looking for remote/online training please contact us. We can train you whether you are in Belltown, Seattle or somewhere around the world. Optional equipment: yoga mat, weight of some sort, pen and paper to write down the finisher at the end.
Reviews (9)
Bre Miller
Dec 16, 2020
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I've been training with Sonja at Demco Fitness for the past two years and for the first time ever I have found a gym that is perfect for me. Sonja always provides the right balance of pushing me forward while also taking into my body's specific issues/needs. When I need a modification for my knee, Sonja is quick to find 3 or 4 alternatives right off the top of her head. I can't recommend Demco Fitness enough!
Cheryle Wong
Sep 23, 2020
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This place is worth every penny. I’ve been going to the semi-personal classes for over a year now and I’m stronger than I’ve ever been. When I first started, I was a gym newbie. I had zero body strength. Sonja’s training (the owner) is so good that I can now actually do a pull-up! Her classes are welcoming to all people and all fitness levels.
Sonja is a very knowledgeable trainer and she creates a custom program each month tailored to your body and goals. This is really nice because the workout is different each day and I don’t get bored of it. Sonja’s programming is effective - you
Sonja is a very knowledgeable trainer and she creates a custom program each month tailored to your body and goals. This is really nice because the workout is different each day and I don’t get bored of it. Sonja’s programming is effective - you
Ilja Rotelli
Sep 11, 2020
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Elaine Anderson
Sep 02, 2020
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I have been going to Demco Fitness for 2 years and love it! It offers so much more than other places. Whether you have 1:1 workouts or attend a semi-private session, Sonja and her staff know what you should be doing. I was amazed during a semi-private with 5 other people how much attention was focused on each of us – correcting movement, answering questions and giving encouragement. Fitting in was one of my concerns but at this gym you see every body type and every age group; and each person has their own goals. My workout is updated regularly which keeps it from being boring and gives me a feeling
Sunita Chaudhary
Aug 01, 2020
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Trevor Holmes
Jul 07, 2020
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My body has truly changed since working out at Demco Fitness!
Sonja, the owner, is amazing and has created such a phenomenal gym where everyone feels welcome. She and the other trainers are so knowledgable and keep your specific needs (knee issues) and goals in mind. Sonja keeps creating amazing programs specific to each member!! The BEST!!!
Sonja, the owner, is amazing and has created such a phenomenal gym where everyone feels welcome. She and the other trainers are so knowledgable and keep your specific needs (knee issues) and goals in mind. Sonja keeps creating amazing programs specific to each member!! The BEST!!!
Kristi Marohl
Dec 09, 2018
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Sonja Demco is the best trainer I have ever had. My program is individualized based on my goals and fitness level. The program changes every 4 weeks. I am able to do skills/activities I never thought I could do in my mid 50’s. I have fun.... and have met really wonderful people who also train with Sonja. She is also very knowledgeable of nutrition and addresses the importance of being emotionallly healthy If that is support you need from her. She is a fantastic, caring person who knows her stuff.... so very thankful for her.
Andrea Louie
Jun 20, 2018
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I've been doing semi-personal training with Sonja at Demco Fitness for a few years and have never been bored with my training. I also train for marathons, while other Demco Fitness members have their own fitness goals, and Sonja is able to seamlessly accommodate each person's plan to meet our individual goals. This is a very community-oriented gym--your workout will definitely be challenging, but you'll also definitely have a fun time!
Kelly Glade
Jun 19, 2018
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Demco Fitness is my favorite place to train! I moved back to Seattle from Austin, where I had an awesome trainer who pushed me and worked to build my fitness, endurance and strength – leaving me with high expectations. I trained at another gym for a bit, but just didn’t have the connection or challenge I was looking for. I frequently do half marathons and half ironmans and wanted to build speed and prevent injuries. I found what I was looking for with Sonja at Demco Fitness. Sonja creates a personalized training program for each client. She has worked with me to build up my strength and takes
