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Monday 6am - 9pm Tuesday 6am - 9pm Wednesday 6am - 9pm Thursday 6am - 9pm Friday 6am - 9pm Saturday 6am - 12pm

MJ Fitness & Kickboxing

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United States
Danbury, CT
MJ Fitness & Kickboxing

We Are Danbury’s #1 Transformation Program. Results-focused, Community-driven. We're Dedicated To Transforming Lives.

Bio
Former European Full Contact Karate Champion Mariusz Janicki is the founder and owner of MJ Fitness & Kickboxing . After more than 12 years of competing as a top level full contact fighter, Mariusz has retired to pursue his passion for helping others in achieving their fitness goals. Whether you are looking to lose weight, tone muscle, improve cardio, or simply live a healthier lifestyle, his focus is on you and your personal fitness needs. In addition to fighting, Mariusz has taught as a PE Teacher and Martial arts Instructor working with kids, adults, and professional athletes alike. Mariusz is always researching new training methods and ways to provide his clients with the most functional and effective workouts possible. With accomplishments such as two-time Polish Full Contact Karate Champion, four-time US Lightweight Champion, and amateur Muay Thai/K1 rule record of 8-2, Mariusz has seen, experienced, and mastered a variety of training styles from around the world. This first-hand fighting experience paired with a background in Body Building and Strength Sports Training, Boot Camp, Martial Arts, Personal Training and more, you can be sure Mariusz will help you both mentally and physically in achieving your fitness and weight loss dreams. Education/Certification
Master's Degree in Physical Education (2003) Wroclaw, Poland
Certified Trainer of Body Building and Strength Sports (2003) Worclaw, Poland
Martial Arts Instructor
Certified Personal Trainer
Certified Professional Nutritionist
Certified Boot Camp Instructor
Certified CPR / AED

03/11/2026

First outdoor run of the season 🏃‍♂️
Finally some warm weather ☀️
Let’s go!

03/10/2026

Another huge welcome to the 25 local warriors who stepped up, showed up, and committed to improving their health and their lives. This is how real change begins 👊

Because of the incredible response from our community, we are now opening registration for Group #3.

🚨 Our next 28-Day Transformation Challenge starts April 6th 🚨

Just like the first two groups, spots will go fast.

⚠️ We are accepting ONLY 20 serious people
✔️ First come, first served
✔️ 100% FREE
✔️ No gimmicks
✔️ No upselling
✔️ Just a program that actually works

Both of our previous groups filled before the deadline, and we expect this one to do the same.

👉 Click the link below to claim your spot for the April 6th group:
https://go.mjfitnessct.com/really-free-challenge

💡 And remember — you don’t have to wait until April 6th.

If you’re serious about your health and wellness, reach out today and schedule a FREE consultation with one of our Transformation Coaches.

Your journey doesn’t start someday.
It starts with one decision.
Make it today 💪🔥

03/08/2026

💥 WE’RE OFFICIALLY FULL! 💥

Our FREE 28-Day Transformation Challenge is officially at full capacity, and tomorrow we’re excited to meet 20 local people who are ready to step up and start changing their lives.

We can’t wait to kick things off with this amazing group 👊

And a huge congratulations goes to Manuel, the winner of our first Free 28-Day Transformation Challenge! 🔥

In just 28 days, Manuel:
✔️ Lost 10 lbs
✔️ Burned 2.6% body fat
✔️ Stronger & Leaner
✔️ Increased energy

There’s no magic here.
Just hard work, consistency, and support from one of the best fitness communities around.

This is just the beginning of Manuel’s journey. We’re proud to have Manuel and his family as part of our MJ Fitness team 💪

If you missed the deadline for tomorrow’s orientation, don’t worry.
👉 Our next group starts April 6th.

But don’t wait until then.
If you’re reading this and you’re serious about improving your health and fitness, simply reach out to us. We’re here and ready to help you reach your goals.

Let’s keep changing lives 💪🔥

03/04/2026

The 6-Week RESET Challenge has officially wrapped up… and all we can say is WOW.

First, a huge congratulations to our Challenge Champion — Nicole! 👏

In just 6 weeks Nicole accomplished something incredible:
🔥 7.1 lbs lost
🔥 3.5% body fat burned
🔥 Lean muscle gained

But what makes her results even more impressive is the commitment behind them.

Nicole is a busy mom and wife, juggling a packed schedule like so many of us do. Yet she made the decision to prioritize herself and her health. She showed up for workouts consistently, no matter how busy life got, and she stayed laser-focused on her nutrition plan.

That discipline paid off in a big way.

Nicole, we are incredibly proud of you and thrilled that you’ve decided to continue your life-changing journey with our MJ Fitness family. Your transformation is just getting started. 💪

But Nicole’s success is just one part of the story.

Over the last six weeks we watched an entire group of challengers push past doubts, build new habits, and prove to themselves that change is possible. This challenge wasn’t just about weight loss.

It was about showing up.
It was about commitment.
It was about choosing yourself again and again — even when it wasn’t easy.

And the results across the group were truly inspiring.

This is what happens when you combine:
✔️ A proven program
✔️ Structured workouts and nutrition
✔️ Accountability and coaching
✔️ A community that won’t let you quit

To every challenger who committed, stayed the course, and finished strong — we are so proud of you. You’ve shown everyone around you what’s possible when you decide to go all in.

Thinking “I need this”?

Good news — it’s not too late.

You still have time to register for our FREE 28-Day Transformation Program, and it might be exactly what you’ve been looking for to finally kickstart your results.

If you’re ready to take that first step, now is your chance.
👉 Click the link below — claim your spot before it fills up.
https://go.mjfitnessct.com/really-free-challenge

Your transformation story could be the next one we celebrate.

03/03/2026

4PM Total Strength with Coach Jonathan was FULL 💪🔥
Building muscle is the name of the game. Let’s keep getting stronger!

02/27/2026

Bootcamp isn’t just about burning calories —
It’s about building discipline, confidence, and grit 💪🔥

Let’s keep stacking those workouts 🔥
Stronger than yesterday!

02/25/2026

💥 MEMBER SPOTLIGHT: From Injured & Discouraged to 35 lbs Down — Yvan’s Story.

Yvan’s journey hasn’t been perfect — it’s been real.
Injuries. Frustration. Stopping. Starting again.

He tried the big box gyms. He felt discouraged. At one point, he stopped showing up altogether.

But he didn’t quit on himself.

He found his way back — and this time, it was different.

With hands-on coaching, smart modifications around injuries, and real accountability, Yvan rebuilt his strength the right way. Today he’s 35 lbs lighter, stronger, moving better, and full of confidence.

But what makes this story even more special?

He’s not doing it alone.

His wife Holly has been right by his side — in and out of the gym — supporting, pushing, and growing together. That kind of partnership is powerful. 💪❤️

Together, they show what’s possible when you commit not just to fitness — but to each other.

Yvan’s proof that setbacks don’t define you.
Starting over doesn’t make you weak.
And with the right support system, anything is possible.

Proud of you. This is what transformation really looks like. 🔥

02/19/2026

That partner finisher though 😅🔥
Coach Sam brought the heat and the teamwork 💪🥊
Nothing like finishing strong with your workout buddy!

02/18/2026

Kickboxing isn’t just a workout 🥊
It’s stress relief.
It’s confidence building.
It’s proving to yourself you can do hard things 💪🔥
And this team showed exactly that tonight.

02/14/2026

Happy Valentine’s Day! ❤️💪

Cupid Made a Stop at MJ Fitness! 🏹
Nothing but red, pink, big smiles, and sweaty group pics to prove the love was real ❤️🔥

Who needs chocolates when you’ve got burpees and your fitness family? 💕

02/11/2026

Tough Total Strength session with Coach Amanda 🔥
Legs shaking, wheels growing 🦵💪
That’s how we get stronger!

Address

5 Shelter Rock Road, Building D, 2nd Floor (next To DMV)
Danbury, CT
06810

Opening Hours

Monday	6am - 9pm
Tuesday	6am - 9pm
Wednesday	6am - 9pm
Thursday	6am - 9pm
Friday	6am - 9pm
Saturday	6am - 12pm

Telephone

+2038854580

Website

http://mjfitnessct.com/

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