Justin “Mertz” Mehrtens

Why/How did you first get involved in CrossFit?

My intro to CrossFit was in 2007. My brother and his marine buddy that were on the police force together showed me Crossfit.com. Used it as a supplement to body building for the most part. Didn’t understand it much at all, but I saw my hockey game improve. Even bad CrossFit works! Walked into my first affiliate in Feb 2013 and it was there that I learned I was doing it wrong for 5 years!

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How long have you been coaching and what are your qualifications?

I started coaching and did my L-1 in 2015. Passed my L-3 in 2024. I was part owner of CrossFit Gris-Gris 2022-2025. I have my USAW L-1 and operate an affiliate of Parish Barbell Club.

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Fun fact about you:

I’m on a Hogs for the Cause team. Hupig’s pies. We raise over $20,000 every year to help families that have a child with pediatric brain cancer.

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Outside the gym:

Outside of the love I have in helping change people’s lives with the CrossFit methodology? I'm third generation of Penny’s Auto Chassis that's been operating for 80 years. I have a daughter that was recently married and celebrating 25 years with my own marriage with my wife, Chantel. I also came in 3rd in the nation in Weightlifting in 2024 (Masters 45-49 78k class) and my brother is also a Weightlifting coach that came in 2nd in the world in 2023 (Masters 50-55 106k+class).