CrossFit Una Stamus – Elk River, MN

CrossFit is constantly varied functional movements performed at high intensity. All CrossFit workouts are based on functional movements, and these movements reflect the best aspects of gymnastics, weightlifting, running, rowing and more. These are the core movements of life.

Personal Fitness Training

Group Fitness Classes

Sport-Specific Training

Matt Petz

Certified CrossFit Trainer and Health Coach

“Our athletes are our fitness family, and they are the reason we’re here.”.

Matt is the head coach at Una Stamus Fitness and CrossFit Una Stamus, and has spent a tremendous amount of time connecting with people and leading change as a teacher, trainer, crisis manager, executive, father, and husband. He has a passion for helping others, and has applied his own personal and professional experience to helping others become more functionally fit and lead healthier lives.


Helping our athletes reach their fitness goals – in a way that makes sense to them, in their life – is what we’re all about.

I am down inches!!!!! I am SO EXCITED!!!!!!! Have I said thank you yet?!?! 😊”

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Maple Grove

“The coaches and teammates at Crossfit Una Stamus are fantastic!…”

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Elk River

“I’m so impressed (still!) by the level of thought, care, compassion…”

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We would love to have you drop by our gym in Elk River (“box,” in CrossFit lingo) to say hello and see how CrossFit can work for you.

Crossfit Journal

CrossFit Kids

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Gym Location

13469 Business Center Dr NW
Elk River, Minnesota 55330


Monday 5:00 am—8:30 pm
Tuesday 5:00 am—8:30 pm
Wednesday 5:00 am—8:30 pm
Thursday 5:00 am—8:30 pm
Friday 5:00 am—8:30 pm
Saturday 8:00 am—10:30 am