Grinders Fitness - Northglenn, Colorado

Casey B.

A really good community gym. Everyone is either minding their own business or really friendly. There's zero intimidating factors whenever I attend a class, and the fitness demographics range from extreme beginners to fit and in shape. I really enjoy this gym a lot, would recommend any of the classes and instructors if you want a serious cardio workout.

Emily M.

Grinder's Gym is an absolute gem of a place, and I can’t recommend it enough! I recently attended a boxing class designed to support people with Parkinson’s alongside my parents, and the experience was nothing short of inspiring.

From the moment you walk in, you can feel the energy and passion in the air. The gym is welcoming, well-organized, and has a vibe that makes you want to push yourself while still feeling supported. It’s not just a gym—it’s a community.

Special shoutout to Coach Shannon, who truly makes this place stand out. She’s a powerhouse of positivity, combining her expertise in boxing with a unique ability to motivate and connect with every single person in the room. She’s funny, witty, and clearly cares deeply about her students. Whether you’re a seasoned athlete or someone just starting out, Shannon has a way of making you feel like you belong and can achieve anything.

The class itself was challenging yet incredibly rewarding. It’s clear that a lot of thought goes into tailoring these sessions to meet the needs of everyone in the room. The Parkinson’s class, in particular, was inspiring to witness. Watching the determination and camaraderie of the participants—and how much they benefit from this program—was truly humbling.

Grinder's Gym isn’t just about physical fitness; it’s about building strength in every sense of the word—body, mind, and spirit. If you’re looking for a place where the coaches care, the community is strong, and the workouts are top-notch, Grinder's Gym is it.

5/5 stars—punching Parkinson’s (and life’s challenges) in the face, one jab at a time!

Kristin D.

This place is a hidden gem. I’m so glad I found it. I did a 12 week transformation here and cannot say enough good things about the staff and community. Shannon was so encouraging and really held me accountable. Everyone here is so welcoming and encouraging. Not only are the workouts fun but I would burn up to 700 calories per class. I was also given strength training workouts and tracked all of my food in the app. The nutrition plan was life changing. It really reset how I approach and think about food. I went from gaining 1-2 lbs a month to losing 10 lbs on this program. If you are on the fence, just do it. This program is so empowering.

Shey C.

The vibe in here is amazing! I feel so good after the intense workouts. Having their support has been very helpful. They send me workouts to do, messages to make sure I'm staying on track, nutrition assistance. I am so happy I joined this gym to see more results. Consistency is key and I have a long way to go to get to where I want to be but I will keep working hard to get to my goal.

Stephen C.

I joined the 6 weeks course to get my self in shape and it was one of the best parts of my day, Shannon really pushed me to do one more rep or an extra 10 sec on the bag. Joining the class was a decision I would not regret I even quit smoking after 13 yrs of doing so, thank you grinders for changing my life

Beth V. P.

If I could award 10 stars, I would! This gym and its exceptional team are precisely what you need, regardless of your skill level or fitness objectives. The coaches here are not only knowledgeable and patient but also incredibly encouraging and engaging. Whether your focus is on strength training, technical sparring, weight loss, or competitive pursuits, they provide comprehensive support. Moreover, the community of members is among the most kind-hearted, welcoming, and FUN individuals I've had the privilege of training alongside. In short, joining this gym is a decision you will not regret!

Tony F.

I cannot say enough great things about this place!
You want a workout to start your day, Jessica brings the energy and intensity to get you started right!
You want a workout that makes it feel like it isn’t a workout? Beating up a bag is the best way to go! Shannon is one heck of a trainer! She knows her stuff when it comes to fighting and her classes will get you in shape! She also teaches technical striking if you want to really learn how to fight.
You want an owner who genuinely cares for his members? Bill is the man! Every time I go in there or see someone coming in he is there to greet you with a smile and excited to see you showing up!
This place has an amazing community and I highly recommend using the FREE one day trial to check it out!

Sierra T. S.

Grinders is the best gym I’ve ever been to! I love being a part of this team! Such an amazing atmosphere and amazing coaches!