7AM - 7PM
1 Superior Dr B, SuperiorOpen 24 today
2525 Arapahoe Ave Building H7, Boulder“I have been training with Nate for the past few weeks, and the experience has been awesome! He is very knowledgeable and is a fantastic trainer. He is consistent, positive, and always ready with a great workout routine. I'm already feeling and seeing a difference in my strength and muscle tone. ?
I highly recommend this training gym because of the amazing staff!“
7AM - 9PM
1850 30th St, Boulder“Good gym at a pretty unbeatable cost. Make sure to read the fine print on agreements though.“
6AM - 6PM
14455 W 64th Ave Unit R, Arvada“Coach Joe is phenomenal - and the workout itself was energizing, challenging and all around really fun. 11/10 recommend coming here. No matter what your level of fitness is you’ll be able to feel strong and make progress!“
6AM - 6PM
1750 29th St Suite 2020, Boulder“F45 Central Boulder is a great place to workout! Awesome functional workouts & even better trainers!“
Open 24 today
651 Mitchell Way, Erie“Great gym, very clean. Would like to see more plates because sometimes it is a struggle to find 35lb plates, and a dedicated calf machine.“
Closed today
9975 Wadsworth Pkwy #1900, Westminster“We train people in Sambo, jiujitsu, MMA and Soviet inspired strength training with multiple full weight rooms.“
Closed today
6395 Gunpark Dr STE A, Boulder“I've had an amazing journey working with Ross! His deep knowledge of exercise science and body biomechanics is exceptional, and his keen eye for detail makes all the difference—especially when it comes to problem-solving long-standing movement patterns.
As a Chiropractor with extensive experience in personal training and physical therapy, I came in with a solid foundation of knowledge—yet Ross continually expands my understanding. I learn something new in every session, and I always leave feeling inspired and better equipped in my own work.
If you're considering working with Ross, I can confidently say: you will not be disappointed.“
Closed today
9975 Wadsworth Pkwy Unit M2-A, Broomfield“I’m so grateful we found Strength to Strength. The trainers here are incredibly knowledgeable—each one brings a unique gift for helping young athletes grow. I have three sons, ages 12 to 17, and every one of them has benefited both mentally and physically from training at this facility.
They’re not only building strength and endurance, but they’re also being genuinely inspired by the men who coach them. This kind of investment isn’t inexpensive, but I tell people all the time: I would give up a lot of things before giving up this. It’s hands down the best money we’ve spent on our kids.“
6AM - 8PM
5105 W 120th Ave, Broomfield“I love this place. The ~ 7:30 am crew is always my hype. ( they are kind and their welcoming energy really helps get my workout/ day started). Good vibes from all the employees and the gym really has everything I could possibly need.“
Closed today
4586 N 95th St, Lafayette“Testimonial for Coach Janet
I’ve been working with Janet on and off for over 13 years, and I can honestly say she has transformed my running. When we first started, my running was very casual, and she helped me connect with my core and learn how to run in a more grounded, efficient way. A few years ago, I increased the intensity of my training and began ultra running. As I made that transition, I struggled with recurring injuries, especially from over striding. Janet helped me not only recover but completely rebuild my form—teaching me how to maximize my stride without overstraining or pounding my body.
Thanks to her expert guidance, I’ve now been injury-free for over a year while running 95 miles per week. I completed my first 50-mile race and won my first 100K at the Mad City Ultras last spring.
Janet has a rare gift for seeing exactly what a runner needs to do to improve their form. While she’s incredibly detail-oriented and focused on the fine points that enhance performance, her insight goes far beyond the physical. She works with you on the mental and emotional levels too—and on how all three interact and show up in your running. She’s remarkably perseverant and creative, always finding new ways to help you make meaningful, lasting changes. I can’t tell you how many different ways she’s reminded me to engage my core!
As a former elite ultra runner herself, Janet knows what it takes to stay strong, push your limits, and maintain balance. She brings that deep, lived experience to every coaching session. Whether it’s learning to use terrain more effectively or building a lifestyle that supports and sustains your running, Janet sees and supports the whole picture.
Because of the tools Janet has taught me, I feel much more confident in my body and in my ability to run through challenges. Her coaching has helped me build not just strength, but resilience. I’m incredibly grateful for her help and guidance—and I can’t recommend her highly enough.
Amber Arvidson, winner of the Duke City Marathon 2023 and the Mad City 100K 2025“
“My son has been attending this place for nearly 2 years by now. We absolutely love it! He enjoys it each class and always wants to come back. Owners create family atmosphere and care for kids. They teach them respect, responsibility, how to be organized in addition to physical skills. Thank you!“
10AM - 2PM
2100 Pearl St, Boulder“I’m 66 and have been training with Brenna at KoaFit for three years now. What makes her exceptional is that she deeply understands how bodies work—and she isn’t superficial or trendy about it. She’s serious about her profession, regularly investing in her continuing education. She combines that rigor with warmth and encouragement.
Brenna builds precise, customized fitness plans for me—also for my at-home training days—so I never lose momentum. She zeros in on core imbalances, tailors progressions, and pushes me in places I don’t think I can go. After a lifetime of hard sport, I was dealing with muscular and bone deterioration I’d resigned myself to. But under her guidance, I’ve grown stronger, steadier, and even reversed damage I thought was permanent.
The studio vibe is just right: upbeat, supportive, friendly, and never judgmental. If you want training rooted in science but delivered with heart, Brenna at KoaFit is the real deal.“
Closed today
3700 W 144th Ave D700, Broomfield“All the staff are super friendly and encouraging. I am amazed at what a good workout I can get in just 20 minutes. Even when I don’t want to go, I tell myself it’s just 20 minutes and get myself to go. Both my husband and I have better muscles now than we did with a personal trainer.“
6AM - 8PM
8601 Sheridan Boulevard, Westminster“A great gym that has amazing staff, clean and top notch workout equipment and a welcoming atmosphere to workout in.“
Closed today
6510 Wadsworth Blvd #150, Arvada“I began working with Amy several months ago as I started training for the Chicago Marathon in 2025. I hadn’t run in years, but from the very beginning Amy made me feel confident and comfortable that I could do this.
What sets Amy apart is that she doesn’t just hand you a plan. She takes the time to assess your individual needs—your strengths, weaknesses, and goals—and builds a program that helps improve muscle strength, flexibility, and running strategy. Her approach is thoughtful, personalized, and effective.
Beyond her expertise, Amy is incredibly kind, generous, and fun to work with. She motivates you in a way that makes the process enjoyable, even on the tough days. Without her guidance, there’s no way I’d be on track to run this marathon, and more importantly, to keep running beyond it.
I feel so lucky to have Amy as my coach, and I encourage anyone considering training for a race—or simply wanting to become a stronger, healthier runner—to work with her. She’s the best partner you could have on this journey.“
6AM - 3PM
5603 Arapahoe Ave #5, Boulder“I've used over a dozen various trainers in Boulder County. Matt H & Petra are by far the best trainers from the bunch. I would highly recommend them for anyone looking for results.“
“Matt was an amazing therapist. He listened well, had great deep pressure, and I left feeling great. Highly recommend him!“
Open 24 today
2868 30th St, Boulder“Sam Iannetta owner and personal trainer is fantastic especially at resolving old or new injuries. His understanding of body mechanics is exceptional. He helped me prepare for an L4-L5 fusion and my recovery. I have had a really fast recovery as a result.“
Closed today
8353 Dudley Ct, Arvada“I run and own a civil engineering firm in the area. I also travel train and plan professional beach volleyball. Sam is excellent and creates workouts/programs that cater to exactly what you need and he meets you where you are at. Super personable super expert.“
6AM - 8PM
4650 W 120th Ave Unit 1, Broomfield“There is a very friendly...Professional young man working the front on Saturday's around 1pm....He is a pleasure and encouraging...and knowledgeable...and does it all with a big bright smile....i look forward to greeting him...Give this dude a Raise....“
“I have been working out with Chad and his team for over 4 years. I experienced back pain from the age of 32 until I started working out with Chad at 60 plus years old. His program really got rid of my back pain and the life limitations I experienced a few times per year when my nerves would get inflamed. I no longer experience anything like that. I will turn 65 in a few days. I feel like I am the fittest I have been in my life. That says a lot coming from someone that ran and worked out his entire life. The key was the core exercise that he helped me understand. Now I can do almost any exercise. It changed my life. I work out 4 days per week and have no intention of stopping. His program can help anyone with any level of fitness. He changes the workouts daily and tailors them to your needs. The investment in my health has been worth it. Check it out. It just may be the best thing you will ever do for yourself. Al Manzi“
7AM - 7PM
1347 E South Boulder Rd, Louisville“consistently clean with good equipment. sometimes the music is too loud to hear my own though“
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“PT Josh has been amazing. Our son has been training with him this past hockey season. We have noticed a significant improvement in strength, overall physical presence on the ice. Josh is easy to work with, and connecting the training to in sport goals. Highly recommended.“