Keswick · Est. 2008 · Kids 4+ · Teens · Adults · Co-ed & women’s only
Beginner-friendly Brazilian jiu-jitsu, Muay Thai, boxing and MMA for kids, teens and adults at every level — 3,500 square feet of mat, and multiple black belts on the floor.
2 weeks free · every class · unlimited
No experience needed. Pick a class, show up, we'll take it from there.Three doors. Pick yours.
Tiny Ninjas from age 4, youth BJJ and Muay Thai to 15. Focus, confidence, and a real skill that nobody can take off them.
Never trained? Start in Combat Core. Been at it a while? The Combat Athlete Program will test you. Women-only bootcamp and BJJ too.
Before & after school with our own bus and driver, PA-day & March Break camps, birthday parties. Your kid trains; you get the hours back.
Every program below is included in your two free weeks. Try one. Try All.
Brazilian jiu-jitsu, wrestling and judo in one — no striking at this age. Escapes, submissions and how to control someone rather than hurt them. Forty minutes of fitness, focus, listening and grappling games, with coaches who know how four-year-olds actually work.
Tiny Ninjas details →Youth and Tween BJJ, and Youth Muay Thai. Technique first, discipline always — and a room where the new kid gets partnered up, not left standing at the edge.
Youth programs →The beginner-friendly track, and where most adults start. BJJ in the gi and no-gi, Muay Thai, kickboxing, boxing, wrestling and MMA — built to get you fit and skilled alongside other beginners. Nobody is getting a black eye. If you’re thinking “I need to get in shape first”, this is the room where that happens.
Combat Core →Where Combat Core leads. Longer classes, harder rounds, and the skills to handle other trained athletes — striking, grappling and MMA with sparring, for students who want to go further down the rabbit hole.
CAP →Fitness kickboxing, women only. Real technique on real bags, in a room that runs on encouragement and motivation and motivation — plus a women’s-only BJJ class for the self-defence side: escapes, control and submissions.
Battle Girl →One coach, one student, one goal — a competition, a plateau, a nervous first-timer, or a kid who does better without an audience. Ask and we'll build it around you.
Ask about privates →Nearly every adult who walks in says a version of the same thing — I need to get in shape first, I’m too old, I’ll get beaten up, you have to start as a kid. None of it is true here. Combat Core is technique and drilling with other beginners, sparring is a choice you make much later, and you will not be the worst person in the room, because there is no such thing here.
Book your first free class More for adultsAdam started teaching in Georgina in 2008 and opened Rumble’s doors in January 2012. We were the first gym of our kind here, and we’re still here. The most experienced and highest-level instruction in Georgina — years of results, and athletes built from scratch onto Team Canada in both striking and grappling, and into the pro ranks. That’s not the reason to train here, but it’s what eighteen years of doing this properly looks like.
Book your first free classMost coaches are a striker or a grappler. Our head instructor is both, and has the medals to show it — Team Canada kickboxing at the World Championships in Spain, 2006, and the IBJJF World Championships in California, 2016. He fought his way onto the national team in both, and has represented Canada around the world in each.
Not one class. Not a week. Fourteen days of every class on the timetable, so you can find out what you actually like.
Choose a program and a day on the booking page. It takes about a minute. If you're not sure which program, pick anything beginner-friendly and we'll steer you on the day.
Shorts or leggings and a t-shirt. No shoes on the mats (socks are fine if you prefer). We have loaner gear for your first sessions, so don't buy anything yet.
Come to as many classes as you want across BJJ, Muay Thai, boxing and more. At the end, if it's your gym, we'll find the membership that fits. If it isn't, no hard feelings.
As Featured On
Great place with great people. Has been a blast so far and both me and my son love it. Awesome workout and friendly, no stress, no intimidation environment!— Steve L., son in the youth program, Dad in Adult BJJ
Best gym around for the whole family to join and be active and be part of something!!! Highly recommend!!!— Pam B., son in the youth program
As a Member of Rumble Martial Arts this place is amazing. The people the environment the positive atmosphere gets me and my family excited!!!— Grace L., Mom in Bootcamp, 2 kids in Youth
The gym is closed mid-day on weekdays. Full timetable on the schedule page.
Private lessons, after-school spots, camps, a party, or "is my kid too young?" — send it and a real person from Team Rumble replies.
