Relentless MMA & Fitness

Directions Website Contact the business

Relentless MMA & Fitness We are a Mixed Martial Arts and Fitness Facility focused on Kickboxing, Brazilian Jiu-Jitsu, and Fitness for kids and adults. www.relentlessmma.ca

We offer classes for all ages and skill levels. Whether your goal is to become a competitor or just to become more active, lose weight, or get stronger, this is the gym for you! Our Dedicated coaches will do everything they can to help you achieve your goal. Our Facility has 3500 Square Feet of Mat Space, a 20 x 20 Competition size Boxing Ring, Weight room, showers and more! Join our Relentless Family today, you wonโ€™t regret it.

More than just a name on a shirt. It's a mindset. A team. A family. A standard. We are Relentless.
10/23/2026

More than just a name on a shirt. It's a mindset. A team. A family. A standard. We are Relentless.

Relentless Shorts!We have our new Shorts on pre-sale until November 1st. There is a 6 week production time. Perfect for ...
10/21/2026

Relentless Shorts!

We have our new Shorts on pre-sale until November 1st. There is a 6 week production time. Perfect for all members and makes for a good Christmas gift! You can purchase in advance at the link below or on our app. Kids & adults sizes.

https://cp.mystudio.io/r/?=RelentlessMMA/4742/377214//1792596371

Back by popular demand! Our Relentless Canada shirt is on PRE-ORDER until October 11th. Please order on the app or DM us...
10/03/2026

Back by popular demand! Our Relentless Canada shirt is on PRE-ORDER until October 11th. Please order on the app or DM us! ๐Ÿ‡จ๐Ÿ‡ฆ

๐Ÿ”ฅ TRAIN FOR THE REST OF 2026 FOR JUST $350! ๐Ÿ”ฅWhy wait until January to start?Join Relentless MMA & Fitness and train thr...
10/03/2026

๐Ÿ”ฅ TRAIN FOR THE REST OF 2026 FOR JUST $350! ๐Ÿ”ฅ

Why wait until January to start?

Join Relentless MMA & Fitness and train through December 31, 2026!

๐ŸฅŠ Kickboxing
๐Ÿฅ‹ Brazilian Jiu-Jitsu
๐ŸฅŠ Boxing
๐Ÿ’ช Strength & Conditioning

Programs for kids, teens and adults. All experience levels welcome!

Whether you want to get stronger, build confidence, learn new skills or find your community, there's a place for you here.

๐Ÿ“ 105 Merritt St., St. Catharines

DM us โ€œ2026โ€ to get started!

Don't wait until January. Start now. Finish the year strong.

BE RELENTLESS.

๐ŸฅŠ ๐™๐™๐˜ผ๐™„๐™‰ ๐™’๐™„๐™๐™ƒ ๐˜ผ ๐™๐™๐™„๐™€๐™‰๐˜ฟ ๐ŸฅŠWalking into a martial arts gym can feel intimidating โ€” so why not start your journey with a frie...
09/29/2026

๐ŸฅŠ ๐™๐™๐˜ผ๐™„๐™‰ ๐™’๐™„๐™๐™ƒ ๐˜ผ ๐™๐™๐™„๐™€๐™‰๐˜ฟ ๐ŸฅŠ

Walking into a martial arts gym can feel intimidating โ€” so why not start your journey with a friend by your side?

๐Ÿ”ฅ ๐Ÿฎ ๐—ฃ๐—ฒ๐—ผ๐—ฝ๐—น๐—ฒ. ๐Ÿฏ ๐— ๐—ผ๐—ป๐˜๐—ต๐˜€. ๐—ข๐—ป๐—น๐˜† $๐Ÿฐ๐Ÿต๐Ÿต ๐Ÿ”ฅ

Includes:
โšก Kickboxing
โšก Brazilian Jiu-Jitsu
โšก Boxing
โšก Fitness Classes
โšก Kids & Adults Programs
โšก Savings of over $150 each!

Support each other, get fit together, and learn real martial arts in a fun, welcoming environment. ๐Ÿ’ฏ

๐Ÿ“ Limited spots available โ€” message us now to grab this deal!

๐Ÿ”ฅ FIGHT ANNOUNCEMENT ๐Ÿ”ฅCOACH PILAR IS BACK IN THE CAGE ON NOVEMBER 7TH!Janie McGlohon returns to the K4 ring to face Pila...
09/27/2026

๐Ÿ”ฅ FIGHT ANNOUNCEMENT ๐Ÿ”ฅ

COACH PILAR IS BACK IN THE CAGE ON NOVEMBER 7TH!

Janie McGlohon returns to the K4 ring to face Pilar Dietrich in a Strawweight Kickboxing Bout!

A former K4 Muay Thai Champion, Janie McGlohon of BUMA looks to add another win to her K4 resume. Making the trip from Ontario Canada, Relentless MMAโ€™s Pilar Dietrich looks to build on her most recent victory and continue her climb toward title contention.

๐Ÿ‡บ๐Ÿ‡ธ USA vs. CANADA ๐Ÿ‡จ๐Ÿ‡ฆ

๐Ÿ“ Buffalo RiverWorks

๐ŸŽŸ๏ธ Tickets: Riverworks.com/events

Support your favorite fighter by using their promo code at checkout:

K4MCGLOHON | K4DIETRICH

๐ŸฅŠ๐™’๐™Š๐™ˆ๐™€๐™‰'๐™Ž ๐˜ฝ๐™Š๐™“๐™๐™„๐™!๐ŸฅŠWe are excited to announce our next Boxfit session!Boxfit classes will be 1 hour and will be a cardio w...
09/24/2026

๐ŸฅŠ๐™’๐™Š๐™ˆ๐™€๐™‰'๐™Ž ๐˜ฝ๐™Š๐™“๐™๐™„๐™!๐ŸฅŠ

We are excited to announce our next Boxfit session!

Boxfit classes will be 1 hour and will be a cardio workout focusing on boxing techniques and self-defense. No experience is required. This will be a 6-week program!

๐ŸฅŠ๐—ฆ๐˜๐—ฎ๐—ฟ๐˜๐—ถ๐—ป๐—ด: Monday, October 26th for 6 weeks.

๐Ÿ•๐—ช๐—ต๐—ฒ๐—ป: Monday & Wednesday at 5pm.

๐Ÿ“๐—ช๐—ต๐—ฒ๐—ฟ๐—ฒ: Relentless MMA & Fitness, 105 Merritt Street St Catharines.

โšก๏ธ๐—–๐—ผ๐˜€๐˜: $299 + HST.

๐ŸฅŠ๐—œ๐—ป๐—ฐ๐—น๐˜‚๐—ฑ๐—ฒ๐˜€: 2 Boxfit classes per week AND a pair of boxing gloves! ๐ŸฅŠ๐ŸฅŠ

We have limited spots available. This will sell out! Contact us to book before we fill up!

Relentless is a safe and welcome environment for all.

๐˜ผ๐™๐™€ ๐™”๐™Š๐™ ๐™‰๐™Š๐™ ๐™€๐™‰๐™๐™€๐™๐™๐˜ผ๐™„๐™‰๐™€๐˜ฟ? ๐˜พ๐˜ผ๐™‹๐™๐™„๐™Š๐™‰ ๐™๐™ƒ๐™„๐™Ž๐Ÿ‘‡Best caption gets a free Relentless Shirt!
09/23/2026

๐˜ผ๐™๐™€ ๐™”๐™Š๐™ ๐™‰๐™Š๐™ ๐™€๐™‰๐™๐™€๐™๐™๐˜ผ๐™„๐™‰๐™€๐˜ฟ? ๐˜พ๐˜ผ๐™‹๐™๐™„๐™Š๐™‰ ๐™๐™ƒ๐™„๐™Ž๐Ÿ‘‡

Best caption gets a free Relentless Shirt!

MORE THAN A GYM. ๐ŸฅŠDifferent goals. Different backgrounds. One community.We show up, work hard, push each other, and cele...
09/16/2026

MORE THAN A GYM. ๐ŸฅŠ

Different goals. Different backgrounds. One community.

We show up, work hard, push each other, and celebrate the wins together.

This is what Relentless is all about. ๐Ÿ–ค๐Ÿ’›

09/10/2026

๐™Ž๐™€๐™€ ๐™„๐™. ๐˜ฟ๐™๐™„๐™‡๐™‡ ๐™„๐™. ๐™€๐™“๐™€๐˜พ๐™๐™๐™€ ๐™„๐™.๐Ÿ”ฅ

Address

105 Merritt Street
Saint Catharines, ON
L2T1J7

Opening Hours

Monday 4pm - 9:30pm
Tuesday 3:30pm - 9:30pm
Wednesday 4:30pm - 12pm
Thursday 8am - 9pm
Friday 4:30pm - 8pm
Saturday 9am - 2:30pm

Website

Alerts

Be the first to know and let us send you an email when Relentless MMA & Fitness posts news and promotions. Your email address will not be used for any other purpose, and you can unsubscribe at any time.

Contact The Business

Send a message to Relentless MMA & Fitness:

Shortcuts

Share

Category