MJ Fitness & Kickboxing

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

06/20/2026

🔥 Great group finisher brought to you by Coach James! 🔥

High energy, teamwork, and a strong finish to an awesome workout 💪

Nothing like pushing through those final minutes together and leaving it all on the floor. Great job, team! 👊🔥

06/18/2026

Once again, Janet reminds us all that age is just a number and mindset is everything 💪🔥

She’s not slowing down—she’s getting stronger.

Yesterday, Janet hit another incredible milestone, deadlifting 160 lbs—well above her own body weight! And the best part? She still had more in the tank. A new personal record is right around the corner. 👊

From climbing ropes and running 5Ks to conquering Spartan races and crushing strength workouts, Janet continues to challenge herself and raise the bar.

Her dedication, consistency, and determination are truly inspiring. She shows us every day that there are no limits when you’re willing to put in the work.

Janet, thank you for being such an incredible example of what’s possible. You inspire everyone around you more than you know. ❤️💪

🎉 Please help us welcome the newest member of the MJ Fitness team — Yesenia! 🎉Yesenia has joined us as our new Front Des...
06/17/2026

🎉 Please help us welcome the newest member of the MJ Fitness team — Yesenia! 🎉

Yesenia has joined us as our new Front Desk Receptionist and will be the first smiling face to welcome you during our morning hours ☀️💪

Be sure to say hello and give her a warm MJ Fitness welcome the next time you’re in the gym! 👋😊

Welcome to the team, Yesenia!

🚨 IMPORTANT UPDATE 🚨This is your LAST CHANCE to join 👇FREE 28-Day SUMMER PAYBACK Challenge⚠️ This offer expires THIS WEE...
06/15/2026

🚨 IMPORTANT UPDATE 🚨
This is your LAST CHANCE to join 👇

FREE 28-Day SUMMER PAYBACK Challenge

⚠️ This offer expires THIS WEEK.
⚠️ Our final group of just 5 new people starts on Monday, June 22nd.
⚠️ Once those 5 spots are filled, this challenge is officially over.

There will be no additional groups.
No extensions.
No exceptions.

So here’s the deal:

💥 You put down a $40 commitment deposit.
💥 Complete the challenge and follow the rules? You get all $40 back.
💥 Don’t finish? We donate your $40 to a charity of YOUR choice ❤️

That’s it.

No gimmicks.
No hidden fees.
No upsells.

Just a real opportunity for local people who are ready to stop starting over and finally commit to themselves.

WHAT YOU GET:
✅ 3 coached workouts per week
(Bootcamp • Strength • Kickboxing)
✅ Personalized nutrition guidance built for real life
✅ Weekly accountability coaching
✅ 2 InBody scans to measure real progress

💥 Total value: $548
💥 Your cost when you complete the challenge: ZERO

This challenge is for people who are tired of:
❌ Losing motivation
❌ Starting over every Monday
❌ Feeling uncomfortable in their own skin
❌ Waiting for "the perfect time"

Because summer is here… and this could be the moment everything changes.

👇 Click below to claim your spot before it fills up 💪🔥
https://site.mjfitnessct.com/sales-page

⚠️Disclaimer: First Time Visitors Only.

This weekend wasn't just about crossing a finish line—it was about overcoming obstacles, pushing past limits, and provin...
06/09/2026

This weekend wasn't just about crossing a finish line—it was about overcoming obstacles, pushing past limits, and proving to yourselves that you're capable of far more than you think.

I am extremely proud of our entire team. From start to finish, you stuck together, supported one another, encouraged each other through the tough moments, and never left anyone behind. That's what makes this group so special.

One of the greatest feelings as a coach is watching people conquer their deepest fears and step far outside their comfort zones. What many of you accomplished this weekend seemed impossible not too long ago, yet you showed up, faced the challenge head-on, and got it done.

A huge shout-out to our incredible MJ Fitness Warriors who took on the Spartan Race in Bethel, NY! 🏔️🔥

This venue never disappoints—beautiful weather, challenging terrain, and of course... plenty of mud! 😅💪

You showed grit. You showed heart. And most importantly, you showed what can happen when a team believes in each other.

This was more than a race—it was a reminder that together, we are stronger.

Stay tuned for epic photos and our highlight video coming soon! 🙌🔥

💥 MEMBER SPOTLIGHT: Vanessa - From Good Results To Incredible Results🔥When Vanessa first started her journey, she wanted...
06/03/2026

💥 MEMBER SPOTLIGHT: Vanessa - From Good Results To Incredible Results🔥

When Vanessa first started her journey, she wanted to lose some weight, feel better, and become healthier.

What she probably didn't realize at the time was just how much she was capable of accomplishing.

Fast forward to today, and Vanessa has completely transformed herself.

💥 23.7 lbs lost
💥 16.2% body fat burned
💥 Countless inches gone
💥 Stronger, healthier, and more confident than ever

What makes this transformation even more impressive is everything she balances behind the scenes.

Vanessa has a very demanding job where she's constantly on the move, often logging 20,000+ steps every single day. By the time most people would call it a day and head home to relax, Vanessa is showing up to the gym ready to put in more work.

No matter how tired she is.
No matter how long her day has been.
No matter how many reasons she could find to skip.

She shows up.

And that's why her results continue to improve month after month.

This transformation wasn't built on motivation.

It was built on the days she was exhausted but came anyway.

It was built on making healthy choices when nobody was watching.

It was built on trusting the process and understanding that real, lasting change takes time.

As a busy wife and mom, Vanessa has every excuse to put herself last. Instead, she made the decision that her health matters too.

And because of that decision, she's not only changing her own life — she's setting an incredible example for her family and everyone around her.

One of the things we admire most about Vanessa is that she's never satisfied with simply "good enough." As soon as she reaches one milestone, she's ready to chase the next one.

That's why her transformation keeps getting better and better.

Vanessa, we are beyond proud of you. Not just because you've lost nearly 24 pounds and burned over 16% body fat, but because of the consistency, determination, and resilience you've shown every step of the way.

Your journey proves that you don't need perfect conditions to succeed.

You just need to keep showing up.

And that's exactly what you've done. 💚🔥💪

Keep crushing it, Vanessa. Your story is inspiring more people than you'll ever know.

7PM Bootcamp was PACKED 🔥💪The energy was high, the music was loud, and this crew absolutely crushed it.This is how we do...
06/01/2026

7PM Bootcamp was PACKED 🔥💪
The energy was high, the music was loud, and this crew absolutely crushed it.
This is how we do Monday nights at MJ Fitness 👊😎
💪

06/01/2026

MONDAY VIBES 🔥💪

New week. New opportunities. New results!

Let’s get stronger, healthier and fit together. See you this week for a class 😎

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

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