ONLY $25

At Fit Theorem - Harlem, we encourage our first-time fighters to begin with an intro kickboxing session. These fun, bag-smashing, high-energy sessions provide a comprehensive workout that combines cardio, strength, and flexibility training, making it the perfect starting point for your journey, regardless of your fitness level.

We also offer a range of fitness options including kettlebell, yoga, sparring, self defense sessions, open gym, transformation challenges and personal training.

Sign Up Now for Your Introductory Fitness Kickboxing Session & Assessment

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The Workout

We combine the sweet science of kickboxing with the transformative power of HITT training. It’s a high-octane fighter's workout that offers:

  • Authentic HIIT (High-Intensity Interval Training)

  • Metabolic Conditioning (MetCon)

  • Benefits of cardio in one seamless class

FITT Kickboxing

We offer dynamic Kickboxing, HIIT, and Strength training. We warm you up for the charge, and charge you up for the cooldown, preparing you mentally and physically for whatever lies ahead!

The Fighter element incorporates kickboxing combinations with a standing heavy bag. Kickboxing helps develop coordination between the lower body and upper body through rotational patterns, balance, strength, and speed.

The HIIT element is fire, and it incorporates High Intensity Interval Training with bodyweight movements. HIIT is effective for burning a high amount of calories, improving oxygen consumption, increasing metabolism and improving cardiovascular function.

Our Coaches

Our passionate coaches bring years of experience to each kickboxing session, delivering engaging, challenging workouts that help you unleash your inner fighter.

Coach Ting

Ting is known for having one of the most challenging classes, he utilizes his experience in Kettlebell, Muay Thai, CrossFit, and HIIT Training. If you are looking to make a transformation, this is your first step.

Coach Bella

Bella is full of energy and brings fire to every class. She also leads our 6 Week Challenge, guiding many of our members to successful transformations.

Coach Isabela

Isabela is always warm and welcoming. With a major in psychology, she coaches our 6 Week Challengers' mindset and mindfulness to accomplish their goals, leading them to successful transformations. She also has a background in capoeira and teaches both adult and kids kickboxing classes.

Coach Shanna

Shanna's friendly personality welcomes our members to both fun and technical classes. With a background in kickboxing, boxing and yoga, she'll guide you into perfecting your form.

Coach Andre

Andre is our in-house comedian and trained Muay Thai fighter! Come to class to see him in action - work hard and play harder!

Coach Jhon

Jhon, a dedicated instructor of self-defense and kickboxing classes, is also an amateur fighter. With a wealth of experience in the ring, he brings a unique perspective to his teachings, combining practical techniques with real-world combat strategies.

Coach Frantz

Frantz is a formidable fighter specializing in hard style Muay Thai and kickboxing. He motivates our members to push their limits and embrace the art of fighting.

Join The Movement

Unleash Your Inner Superhero

Hear From Our Members

We Welcome All Fitness Levels


Great atmosphere. The instructors are amazing and always helping on trying to make sure you achieve any goals you may have. Everyone is very friendly and always positive. Been coming here for almost 8 years now and I’m not going anywhere. All classes are amazing.


I love this kickboxing studio and everyone in it. Since the first day they made me feel welcome, understood and capable of achieving my goals. Trainers and members alike are always encouraging me to do better, help me with my posture, give me nutrition guidance. They trainers even texted me to check on me because I missed couple of classes. More than a kickboxing studio I feel I joined a family.

Billy Jackson

Great place for training and fitness. Spacious, clean, with quality heavy bags and fitness equipment. Excellent, knowledgeable coaches who take the extra time to teach you the right techniques. Fit Theorem offers a variety of fitness and combat training classes. If you are serious about making a change in your fitness journey, Fit Theorem is the right place

Frequently Asked Questions

Who can take advantage of this offer?

This offer is exclusively available to first-time clients of Fit Theorem - Harlem. We welcome all fitness levels.

When does this offer expire?

This limited time introductory session and fitness assessment sale will expire soon.

Can I bring my own gloves?

Yes, you can bring your own gloves. Alternatively, we're offering 50% off boxing gloves when you take your first class at the studio.

How can I sign up?

You can sign up through our website or contact us directly by phone or email.

Where can I find the schedule of your classes?

Here is a schedule of our kickboxing classes. After you sign up, you will be able schedule your first kickboxing class online.

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Where is Fit Theorem - Harlem located?

Fit Theorem - Harlem is located at 47 W 116th St, New York, NY 10026, between Lenox and 5th avenues.

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Can beginners join the fitness kickboxing classes?

Absolutely! Our classes are designed to be accessible for all fitness levels. If you are a beginner, our expert trainers will guide you through the basics and ensure you're comfortable before moving onto more complex moves.

Is fitness kickboxing only for people in advanced fitness levels?

Not at all. While our workouts are certainly challenging, we make sure to offer modifications for every exercise to accommodate all fitness levels. Whether you're just starting out on your fitness journey or are a seasoned athlete, you'll find our fitness kickboxing classes to be rewarding and engaging.

Can I use this offer to take another introductory session if I've taken a session in the past?

The offer for the kickboxing class and fitness assessment is designed specifically for new clients only. As an existing or previous client, please contact the studio directly to sign up for a full membership so that you can being taking classes again.

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