Underground Jiu Jitsu

08/26/2026

Learning to fight off your back is one of the most important parts of jiu jitsu.

However, our philosophy/goal is to teach kids how to avoid having to fight off their back. We teach kids to be well rounded martial artists.

It’s about more than technique, it’s about mindset. Teaching them how to overcome size disparities and how to fight through adversity are key tenets of our youth program.

We teach our kids how to control range, secure the takedown, and get to a dominant top position.

As the jiu jitsu saying goes, “get on top stay on top”.

And this is all possible while still having fun. 😀

undergroundjjsg.com

08/26/2026

08/25/2026

Monday night Vendetta crew putting in the work.

Check them out at Vendettajiujitsu.com or stop by 15 Lone Oak Ln. in Hartford WI.

08/24/2026

Noon class.

Guard passing.

Training snakes to bite you back.

08/24/2026

Nogi tonight at 6:30pm

Saturday classes coming in September.

08/24/2026

Monday Schedule

08/23/2026

It doesn’t matter where you start or when you start. What matters is that you begin.

We are a non-traditional grappling academy.

As martial arts continue to evolve—especially jiu jitsu—we treat every class and every practice as a laboratory.

Rather than relying solely on a fixed curriculum, we believe in exploring the problems that are happening on the mats right now. As jiu jitsu grows, so do the positions, strategies, dilemmas and challenges created by that growth.

Our approach is built around curiosity, experimentation and adaptation.

We study what works. We test ideas. We solve problems.

Because jiu jitsu is constantly evolving, we believe the way we learn it should evolve too.

Find your Jiu Jitsu here

undergroundjjsg.com

08/23/2026

Tomorrow in Hartford.

9-11am. All are welcome.