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

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 😎

05/28/2026

Workout in style!

🔥 YOU ASKED… WE LISTENED 🔥After running our FREE 28-Day Challenge earlier this year, we were flooded with messages askin...
05/28/2026

🔥 YOU ASKED… WE LISTENED 🔥

After running our FREE 28-Day Challenge earlier this year, we were flooded with messages asking:
👉 “When are you doing another one?”
👉 “Did we miss it?”
👉 “Can I still join the next group?”

So… we decided to bring it back 👊

But this time, with a twist.

💥 Introducing our brand-new

FREE 28-Day SUMMER PAYBACK Challenge ☀️
And yes… it’s REALLY free.

Here’s how it works:

👉 We ask for a simple $40 deposit to hold your spot and help keep you accountable.

Complete the challenge and follow the rules?
💰 You get every dollar back.

If for any reason you don’t finish?
❤️ We donate your $40 to the charity of YOUR choice.

Win-win.

This is designed for people who are serious about finally following through.

Because let’s be honest…

The people who have something on the line are the people who show up.
And the people who show up… are the people who transform.

Here’s what’s included:
✅ 3x/week 45-minute coached workouts
(Bootcamp • Strength • Kickboxing)
✅ Simple nutrition plan
(no starvation diets — real life nutrition that works)
✅ Weekly 1-on-1 coach check-ins
✅ 2 InBody scans to track your progress

We’ve seen it over and over again…

When someone commits to the process:
🔥 They lose 8–15 lbs
🔥 They drop a size
🔥 They gain confidence
🔥 They stop hiding from summer… and start owning it

📅 The next group officially starts Monday
BUT once you register, you can start immediately and book your first workout right away.

⚠️ Spots are limited!

👉 Click below to claim your spot and take the first step.
https://site.mjfitnessct.com/sales-page

Your summer transformation starts NOW 💪☀️🔥

⚠️ Disclaimer: New visitors only. Excludes past members, challengers, promotions, specials, trials, etc.

05/26/2026

4PM Total Strength 💪🔥
This crew always brings the heat!
Strong energy, hard work, and muscles getting built one rep at a time 👊

🇺🇸 HAPPY MEMORIAL DAY 🇺🇸We honor and remember the brave men and women who made the ultimate sacrifice while serving our ...
05/25/2026

🇺🇸 HAPPY MEMORIAL DAY 🇺🇸

We honor and remember the brave men and women who made the ultimate sacrifice while serving our country.

Spartan workout crew 💪🔥Sweaty, tired, and one step closer to race day 🏔👊Nothing easy about these workouts… but that’s ex...
05/23/2026

Spartan workout crew 💪🔥
Sweaty, tired, and one step closer to race day 🏔👊
Nothing easy about these workouts… but that’s exactly why we do them.
Strong team. Strong mindset. Strong finish.

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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