Classes for all ages, levels, and experiences.

Not just a gym, but a community.

Book A Class

Meet the Team

  • Marc Hummel

    FOUNDER/INSTRUCTOR

    Marc brings experience, energy, and passion to each and every class. Mixing fun with hard work while making sure everyone feels welcome. Marc teaches various classes at CIA, see our full schedule for all classes offered with Marc.

  • Sidney Lodge

    CLASS INSTRUCTOR/TRAINER

    Sidney teaches women’s kickboxing at CIA and offers 1:1 strength training for athletes. She brings the perfect blend of intensity and play to her classes. See our schedule for classes offered with Sid.

  • Amazing staff, effective training. My daughters adore learning from Marc, he is amazing with kids!

    - Michell I

  • Been training here for a while and it’s hands down one of the best environments I’ve been part of. Professional coaching but still super chill. Great energy, great people, and nothing beats getting rounds in with the boys while the music’s going. Feels like home.

    - Jordan O

  • Marc is patient, disciplined, and great with kids — he manages to make class fun while also keeping the structure and focus that martial arts requires. He explains concepts clearly, and it’s been amazing to watch our kids grow over the past 8 months — taking the basic drills they’ve learned and applying them in real practice. You can tell there’s a true curriculum in place, with each class building on the last, but at the same time the sessions are welcoming and enjoyable even for drop-ins.

    - Anna H

  • I've trained at Crucial Instincts several times, and every time I was there it was an absolute blast and time well spent. Whether it was keeping my Jiu-Jitsu fresh, or sharpening my boxing skills Marc and the other members gave me impeccable work, it’s clear that the athletes and coaches are there to work and work hard. Crucial Instincts is a paragon of Martial Arts training in this part of Minnesota, I highly recommend to anyone regardless of their level of experience.

    - Nolan L

  • Trainers that aren't intimidating, but very motivating and supportive.

    - Kayla J

Frequently Asked Questions

Where are you located?

We have two locations in Crosslake, with our main building being in the same building as Up North Social (35494 Co Rd 3 Crosslake, MN). Our other building, which we call North Headquarters, is on the North end of town, a minute South of Moonlight Bay (37322 Co Rd 66 Crosslake, MN). Most classes are held at our main building off of Co Rd 3.

We also have select classes held at 218 Fitness in Pine River. Please see our schedule for specific class locations and times.

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How do I sign up for a class?

Most classes are drop-in friendly, meaning no sign up is required. For 6 week classes there is a class limit, and it’s usually first-come-first-serve. If you have specific class questions, reach out to Marc or Sidney.

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How much are classes?

Unlike most gyms, you do not need a membership to train with us. There are a few options when it comes to paying for a class.

  • Drop in class: $25 (drop ins are not available for 6 week programs)

  • Unlimited classes (monthly): $80 for adults, $65 for kids.

  • 6 Week Programs: $150-$300 (depending on size, coach, and type of class)

Payment plans are available.

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