Pro Martial Arts & Grappling Studio Appleton

Appleton's Leading Authority in
Submission Grappling

We are a Studio dedicated to
developing, expressing, and advancing
the art and science of grappling - through community.

Ben Schroeder
Ben Schroeder
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Theory is THE studio in Appleton for Jiu-Jitsu students looking for a place to train in the gentle art. It’s easily the best value in the Fox Valley: highest quality and most reasonable membership rates, enthusiastic and kind training partners. Levi welcomes all questions and teaches all techniques—nothing is reserved for higher belt ranks. I’m grateful to Levi for creating a perfect space for me to rekindle my love for the sport.
Morgan Schneider
Morgan Schneider
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I shadowed my husband (Ethan) at one of his classes the other day and after seeing what Jiu Jitsu was all about, I grew interested. Although I was nervous to start, I decided to go for it due to how welcoming everyone was, alongside some encouragement from Ethan. So far, attending class has been super rewarding and I’m glad to have pushed myself outside my comfort zone. I am very much looking forward to the journey ahead and if anyone else out there is looking to start their own journey, I would absolutely recommend they start at Theory! 😊
Mark Masterson
Mark Masterson
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I've been doing Jiu Jitsu and MMA on and off for 16 years (unfortunately with way more off than on during that span). I have experienced so many different types of gyms, in that time. The ones that I have found the best are just like Theory, where the instructor is trying to build and foster a culture of learning. If you want to advance your skills in modern nogi submission grappling, you need to check out Theory
Billy Nelson
Billy Nelson
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This place is awesome! I was completely new to BJJ and felt welcomed by Levi and the rest of the other people who go to training sessions. I will be going to his studio for a long time and it has quickly started to become a passion for me. Highly recommend trying it out!
Aaron Taylor
Aaron Taylor
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Just wrapped up my second week of training at Theory and it’s been nothing short of AWESOME! I was a bit nervous heading into class the first day (virtually no real martial arts experience) but was welcomed and made to feel super comfortable and safe right away, which has continued every day. The overall environment and culture at Theory is amazing.
Kimberli Trader
Kimberli Trader
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Levi is fantastic in the youth classes, giving easy to understand instructions, great demonstrations and positive feedback to each of the class participants. We are very happy with our choice!
Hannah Fenn
Hannah Fenn
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Levi is wonderful with kids and an incredibly knowledgable teacher. Our son has been loving the youth class and is gaining so many useful skills -- and having a ton of fun along the way. We're very grateful for Theory!
Jayda Niemi
Jayda Niemi
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Levi is thoughtful, insightful and so knowledgeable about the game of jujutsu! He is a master at his craft. I enjoy his teaching style of calm, controlled and helpful. I am very excited to learn more! The culture is super inclusive and really supportive no matter your size, shape or age.
Isaac Peyton
Isaac Peyton
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I have been to 3 other jiu jitsu gyms in the past and this one definitely tops them all. Levi is very knowledgeable and makes everyone feel welcome. The facility is very clean and well maintained. Also, the training partners are great for whatever skill level you may have.
Jeffrey Lemm
Jeffrey Lemm
Read More
I am a new student of jiu-jitsu. Levi and the students at Theory have been absolutely wonderful. They are welcoming, kind, and gratuitous with their time and knowledge. Theory has created a beautiful facility and culture to train in. I am very happy I chose Theory to start my journey!
Jill Coulter
Jill Coulter
Read More
My daughter is in the youth jiujitsu program and she loves it! She is learning concepts, techniques, and great information on staying safe AND she is having so much fun doing it:)
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Pro Martial Arts & Grappling Studio Appleton

Appleton's Leading Authority in
Submission Grappling

We are a Studio dedicated to
developing, expressing, and advancing
the art and science of grappling - through community.

Ben Schroeder
Ben Schroeder
Read More
Theory is THE studio in Appleton for Jiu-Jitsu students looking for a place to train in the gentle art. It’s easily the best value in the Fox Valley: highest quality and most reasonable membership rates, enthusiastic and kind training partners. Levi welcomes all questions and teaches all techniques—nothing is reserved for higher belt ranks. I’m grateful to Levi for creating a perfect space for me to rekindle my love for the sport.
Morgan Schneider
Morgan Schneider
Read More
I shadowed my husband (Ethan) at one of his classes the other day and after seeing what Jiu Jitsu was all about, I grew interested. Although I was nervous to start, I decided to go for it due to how welcoming everyone was, alongside some encouragement from Ethan. So far, attending class has been super rewarding and I’m glad to have pushed myself outside my comfort zone. I am very much looking forward to the journey ahead and if anyone else out there is looking to start their own journey, I would absolutely recommend they start at Theory! 😊
Mark Masterson
Mark Masterson
Read More
I've been doing Jiu Jitsu and MMA on and off for 16 years (unfortunately with way more off than on during that span). I have experienced so many different types of gyms, in that time. The ones that I have found the best are just like Theory, where the instructor is trying to build and foster a culture of learning. If you want to advance your skills in modern nogi submission grappling, you need to check out Theory
Billy Nelson
Billy Nelson
Read More
This place is awesome! I was completely new to BJJ and felt welcomed by Levi and the rest of the other people who go to training sessions. I will be going to his studio for a long time and it has quickly started to become a passion for me. Highly recommend trying it out!
Aaron Taylor
Aaron Taylor
Read More
Just wrapped up my second week of training at Theory and it’s been nothing short of AWESOME! I was a bit nervous heading into class the first day (virtually no real martial arts experience) but was welcomed and made to feel super comfortable and safe right away, which has continued every day. The overall environment and culture at Theory is amazing.
Kimberli Trader
Kimberli Trader
Read More
Levi is fantastic in the youth classes, giving easy to understand instructions, great demonstrations and positive feedback to each of the class participants. We are very happy with our choice!
Hannah Fenn
Hannah Fenn
Read More
Levi is wonderful with kids and an incredibly knowledgable teacher. Our son has been loving the youth class and is gaining so many useful skills -- and having a ton of fun along the way. We're very grateful for Theory!
Jayda Niemi
Jayda Niemi
Read More
Levi is thoughtful, insightful and so knowledgeable about the game of jujutsu! He is a master at his craft. I enjoy his teaching style of calm, controlled and helpful. I am very excited to learn more! The culture is super inclusive and really supportive no matter your size, shape or age.
Isaac Peyton
Isaac Peyton
Read More
I have been to 3 other jiu jitsu gyms in the past and this one definitely tops them all. Levi is very knowledgeable and makes everyone feel welcome. The facility is very clean and well maintained. Also, the training partners are great for whatever skill level you may have.
Jeffrey Lemm
Jeffrey Lemm
Read More
I am a new student of jiu-jitsu. Levi and the students at Theory have been absolutely wonderful. They are welcoming, kind, and gratuitous with their time and knowledge. Theory has created a beautiful facility and culture to train in. I am very happy I chose Theory to start my journey!
Jill Coulter
Jill Coulter
Read More
My daughter is in the youth jiujitsu program and she loves it! She is learning concepts, techniques, and great information on staying safe AND she is having so much fun doing it:)
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