★ 5

Dom is such a great motivator and knows how to keep you accountable each week. Dom loves what he does and it shows! I lost the weight, am in less pain day to day and even getting that daily protein in 💪🏼 I feel great and have Theorem Strength & Longevity to thank!

Source: Google

★ 5

To say my experience over the last 6 weeks with Dom has been life changing would be an understatement. My strength and body movement is the best is ever been. He’s helped me build a healthy relationship with food, which I’ve lacked trying to lose weight my whole life. My energy level is through the roof and I sleep like a dream! His program has become so much more to me than toning up and building endurance…it’s a life style change and an investment in my future. Stop thinking about making the change and just do it! Dom will be with you every step of the way!

Source: Google

★ 5

Excellent experience. From the first session, Dominick has truly shown his passion for in learning the person to tailor the sessions to their greatest needs. Very knowledgeable. Highly recommend.

Source: Google

★ 5

I cannot recommend Dominick at Theorem Fitness highly enough! I’ve been training with him twice a week since January (8 months now!) and the difference has been life-changing.

Dominick is *beyond* knowledgeable — he actually diagnosed the root of my issue before any doctor did. He’s helped me rebuild strength, manage pain, and regain mobility I thought I’d lost for good.

Each session is unique and tailored to exactly what I need that day. He is incredibly attentive, accommodating for pain flare-ups, and mindful of my spinal history (I’ve had a Harrington rod since my teens — so we’re always working around above/below the rod issues).

Thanks to Dominick, I’ve gone from barely moving to finally getting my groove back — stronger, more confident, and with way less pain. If you’re looking for someone who really knows the body, listens, and delivers results, go see Dominick. Total game-changer!!

Source: Google

★ 5

Dominic is AMAZING. He is extremely knowledgeable, very thorough in a pre-interview, tailors very specific work out plans for each individual. I have multiple health issues- he researched them to better understand how to best help me. He really focuses on resolving pain issues, as well as areas that need to be strengthened.

Dominic is one-on-one with each person. He is driven, focused, motivating, and truly cares. He often follows up with me the day after our visits to see how I feel, and motivates me to keep coming back! He created a specific food/meal plan for me, as well as an at home exercise plan.

His work out facility is spotless. He sanitizes after each person. High-end equipment as well.

I have been going now for about six months. I feel stronger, and my clothes are fitting better!

Can’t thank him enough- you won’t be disappointed!

Source: Google

★ 5

I can’t recommend Dominic and Theorem fitness enough! Working with Dominick has truly transformed my fitness journey. From the start, he took the time to understand my goals and fitness level to create a plan that is both challenging and achievable.

Dominick brings a perfect blend of experience, expertise, motivation, and personalizes it to your fitness goals. My personal struggle is not only the fitness part but also diet nutrition to effectively achieve and maintain my own goals. Dominick offers invaluable advice on nutrition and overall wellness.

Dominick and Theorem Fitness is a game-changer! Not only has my strength and endurance improved significantly, but I’ve also gained a healthier mindset. Highly recommend!

Source: Google

★ 5

I’ve been with Theorem for a month now and I truly could not be happier with my experience. Dominick is incredibly knowledgeable about pain management, exercise, diet, and everything in between. He not only provides expert guidance, but he also keeps me accountable (which is exactly what I needed.) Having someone to push me, educate me, and hold me responsible for my choices has made all the difference.

Because of his program, I lost 6 lbs in just the first week, and I continue to see progress each week with both weight loss and muscle gain. What I really love is how personalized the sessions are. Dominick takes the time to understand all of my past injuries, areas of pain, and personal challenges, then builds a customized program that works perfectly for me.

The gym itself is spotless, well-organized, and equipped with everything you need. Even though my sessions are only 30 minutes twice a week, I leave feeling strong, accomplished, and yes, sore in the best possible way! That soreness reminds me that I am making real progress and doing something positive for myself.

What stands out most is how much Dominick cares about preventing pain during workouts. One of the biggest reasons I had stopped exercising before was because of pain, but with Theorem, I have not experienced any bad pain at all. Instead, I feel healthier, stronger, and more confident after every session.

I am so excited to continue this journey, not only to get into the best shape of my life, but also to live pain-free, healthy, and strong. I am beyond grateful to have found Theorem and would highly recommend them to anyone looking for real results in a supportive and professional environment.

Source: Google

★ 5

Professor Dominick is a great teacher. If you want to truly learn ji jitsu with more one on one teaching, Theorom is the place to do it. I have trained in different gyms and the facilities, cleanliness snd teaching at Theorom is elite.

Source: Google

★ 5

UPDATE: 8/21/2025 Almost year in at Theorem Fitness and Jiu Jitsu club and I am still loving this journey. I am able to attend Jiu Jitsu classes knowing that in a semi private setting I am getting coaching specific to my needs. Additionally, the Isostrong strength training is a perfect accompaniment to my progress in martial arts and everyday activities. My body feels strong and my mind is more focused. I am truly grateful for Professor Dominick welcoming me into this environment and sharing his Theorem, which has given me countless positive benefits.

Coming to Theorem Fitness and Jiu Jitsu club has made so many positive contributions to my life physically and mentally. It was a little scary getting back into martial arts as a female in my 40s, but after 1 class I was hooked. Professor Dominick made me feel welcomed and continues to support my training efforts. The smaller class size makes it feel like more specialized training. My training partners are awesome and respectful. I also love the isophit isometric exercise classes that are challenging yet simple. Dominick has helped me get in better shape, fix mechanical issues in my body, and learn Jiu Jitsu, his Theorem is a life changing experience.

Source: Google

★ 5

I can’t say enough great things about Theorem Fitness! Dominick is truly committed to his clients’ success and it shows in everything he does. I’ve been working with Dom for 8 months and he has helped me reach my goals and beyond.

Source: Google

★ 5

I started training with Dominick Nusdeu at Theorem Fitness and Jiu Jitsu Club in early January after responding to a random ad. At 55, I had always been interested in martial arts but was hesitant to start. From our very first session, Dominick made me feel at ease and genuinely motivated.

If feel it is such a privilege to train and learn from a Black belt of Dom’s caliber. So many schools will not have a black training beginners.

I want to thank Dominick for being a no-nonsense coach who pushes me to never quit. His dedication to my progress has truly transformed my life, and I can’t recommend him highly enough!

Source: Google

★ 5

I have been training with Dominick at Theorem Fitness for several months and during this time I have seen marked improvement in my physical health and strength. My main goals are to get ahead of my Rheumatoid Arthritis and build muscle and strength. The anticipated result being less pain and increased flexibility. I have already experienced improvement.
In the past, I have tried various other trainers and physical therapists to no avail. With Dominick, I can see muscle growth and I feel stronger. Dominick is very knowledgeable and has been able to help me significantly strengthen my weak areas. He keeps the training engaging and provides the necessary accountability I need to maintain my motivation in the program.
He has made himself available for advice at any time. I have not seen this in any other program. He addresses all aspects of training, including diet. He has provided dietary suggestions and adapts a training program unique to my own personal needs and abilities. I, 100%, NO QUESTION, recommend Dominick, especially if you do not think you are able due to a medical issue or injury. It is evident that Dominick truly cares about his clients’ success.

Source: Google

★ 5

Theorem is more than your typical, personal training gym. There is a culture of knowledge and excellence that I have experienced from day one. Professor Dominick is passionate about his craft, highly educated and desires the best for all his clients. If you are willing to be consistent, teachable and humble, Theorem is a gym worthy of checking out.
Blessings and Respect,
Rob

Source: Google

★ 5

I came to Theorem Fitness & Jiu Jitsu to try out the beginners BJJ class. Without knowing anything about Jiu Jitsu, I am now in love with the sport due to the tremendous coaching and environment for learning Professor Dominick provides. If you’re looking to take the leap into Jiu Jitsu, and make progress at more rapid rate, I’m confident this is the best place to do that.

Source: Google

★ 5

Such great results I added 6 more months!!

Source: Google

★ 5

I started training with Dominick back in July 2023 with some big goals and the desire to turn my whole life around, to become healthier and happier!
I wanted to lose weight, strengthen and relieve lower back pains I’d had for many years.
We managed to achieve all of it and more!
He performed a lengthy and thorough in depth assessment of how my body moved and reacted (which I’d never had working with any another trainer), he then built a program personalized to me with all his findings. It worked!!! I lost 25lbs, I’m much stronger, I’ve toned up and fell better than i ever have…and NO pain!!
His approach is genius, and i would highly recommend him over and over, and do!
Don’t suffer, pick up the phone and book an appointment, you will 100% not regret it!

Source: Google

★ 5

Thank you Dominick for helping me to heal my back pain and showing me how the right personalized strength training continues to improve my life.

Source: Google

★ 5

In just 12 weeks of working one on one with Dominick at Theorem Fitness, I reached all my goals! I have greatly improved mobility & flexibility, I am pain completely free and I lost 25 pounds and many, many inches!

I had tried half a year of physiotherapy and was still in pain and still greatly limited in my flexibility & mobility. Dominick thoroughly tested my muscle contractions to truly understand what was happening and why. He then addressed my specific imbalances and set a program personalized for me. I have my life back and my physical future looks brighter than I could have ever imagined! 100% recommend!

Source: Google

★ 5

Dominick is a very knowledgeable at attentive trainer. I don’t even like called him a trainer because he is much more than that. He knows all about pain and how to guide you to achieve your fitness goals without hurting yourself and better yet how to alleviate your aches and pains or improve an injury. He has a very personalized approach to fitness and your health. I can’t thank him enough for his dedication to get me on the right track physically and mentally. Total game changer!

Source: Google

★ 5

Make the investment in yourself today. If you don’t, who will ??Don’t wait another day!! I waited too long, but now I am reaping the benefits. 8 weeks, down 15 lbs. I’m feeling stronger, more energized and most of all I have less pain. Dominick is a great trainer and therapist. It will be worth it.

Source: Google

★ 5

I’m a female brown belt that trains back in Boston. I attended the 7am Tuesday class. Dominic the owner was very responsive to my inquiry to drop in and he made sure he had a good class for me to go to based on my size and skill level. His gym is very clean and the training is very safe and his members are all super friendly. His teaching style is unique and allowed us to practice rather than just talk through a technique. I got a good workout in for sure and got a lot of positional drilling in. Class sizes are typically 8-10 people with a lot of space on the mats. I’ll definitely be back!

Source: Google

★ 5

Dominick helped me with my migraines, hip pain, and get my eating habits on track within 6 weeks. I lost over 10lbs and feel wonderful! So thankful to find him and do this program!

Source: Google

★ 5

If you’re seeking not just a workout but a holistic and innovative approach to fitness and mobility, Dominick is the trainer for you! His personalized approach ensures every session is tailored to my unique needs and abilities. I see incredible results in just a few weeks. Trust his process and don’t hesitate to invest in yourself and your health with Dominick!

Source: Google

★ 5

Was stuck in FL unexpectedly for a bit. Dom let me drop in and even lent gear! Great group of guys. Small classes - private attention! Can't recommend enough.

Source: Google

★ 5

I have been training with Dominick at Theorem for five months now, and I can honestly say he is the most knowledgeable and meticulous fitness instructor I’ve ever worked with. He adjusts every exercise to match the individual’s fitness level and accommodates for differences in physical anatomy. He personalizes his client workouts and nutrition plans and doesn’t just follow a “cookie cutter one-size-fits-all” approach to training and form. Working with him has truly been the most customized fitness experience I have encountered to date.

I lost over 30 lbs. in four months working out through one-on-one sessions at Theorem, and more importantly, my body composition changed dramatically. The accountability I have experienced through Dominick’s coaching has also enabled me to stay on track and learn to be consistent. This is not my first time losing weight, even a significant amount, but Dominick offers a balanced and sustainable approach to fitness and nutrition, with the added benefit of his expertise in science-based workouts that keep his clients safe and injury free. He is truly dedicated and 100% invested in the training he provides, and you can tell that he cares deeply about his clients’ success!

Source: Google

★ 5

Before training at Theorem I would hurt myself training every couple of months. It made me feel so frustrated because I felt like my progress was always stagnating from injuries in my low back, hip, and knees. What I love about training here is there’s such a detailed approach to how to manage my pain short term and long term. What I mean by that is I have been getting custom exercises and recommendations based on my body and it’s history. Since I started working out here with Dominick I’m consistently getting stronger and I haven’t felt any pain in months! This gym is for you if you’re currently dealing with chronic pain problems or if you just want to get next level customized training!

Source: Google

★ 5

While in town, I attended a class at Theorem Fitness & Jiu Jitsu. A seasoned practitioner, Professor Dominick was extremely welcoming and responsive. The class format, high level of instruction, and great group of people will have me returning when I'm back in town. I highly recommend this academy as a safe, effective, and fun way to train.

Source: Google

★ 5

Some call him Donna, Karen or armana. Charismatic and growth oriented. Trust his skill, loyalty and perseverance.

Source: Google

★ 5

About 2 months ago I went into the intro class (at age 41 with no previous experience). I was apprehensive, and thought I would be behind the rest of the class from the start. This wasn't true at all. Dominick, who runs the gym and trains us himself, is very easy to understand, and instructs at a pace that is easy enough to follow. This has everything you need to start and continue learning jiu jitsu!

Not only does Dominick instruct the martial art, but also he is knowledgeable about the human body and nutrition, and provides helpful resources in order to get you where you need to be to enjoy the class and have fun learning. He also offers tailored personalized workout plans(weights and isometric), nutrition, and stretches, to get/keep you fit for jiu jitsu and life.

Class size is currently 10-12 students which is the right size to give students personal attention and feedback. We are also able to communicate, track, and share content on a training app, which Dominick has provided and the class utilizes.

After some time, you begin to develop familiarity and camaraderie with Dominick and your fellow students, which makes us all trust each other and want to learn together.

The location has a full sized mat, weight machines, two full sized bathrooms with showers, cubby shelving, and drinking water. It's all updated, and very clean and comfortable.

This being my only experience, I can't fairly compare this to any other jiu jitsu program in the area. What I do know, though, is that I want for nothing while in this program, and look forward to exercising, learning, and growing.

THIS is the place to look, whether you're interested in trying it out, or wanting to further develop your skills. Highly recommend!

Source: Google

★ 5

The jiu jitsu teaching methods that Dominick uses at his Theorem club has greatly accelerated my BJJ skills. I previous trained at a very good BJJ training center for two years. Dominick focuses our training on only the 20% techniques that are most effective. And all techniques are taught at full strength/resistance with a training partner. Dominick’s methods have really improved my sparring game.

Source: Google

★ 5

Professor Dominick has been amazing in the way his classes are taught. His way of teaching will challenge you, provide you with Jiu-jitsu knowledge that one can expand if you accept to apply it. I highly recommend it to anyone that is willing to learn Jiu-jitsu and better body mobility in your daily life.

Source: Google

★ 5

As someone who's embarked on their Jiu Jitsu journey at Theorem in Bonita Springs, I can't express enough how transformative this experience has been in just over three weeks. The welcoming atmosphere and supportive community instantly made me feel at home. Dominick’s expertise and patience have guided me through every technique, helping me progress and gain confidence with each class. The camaraderie among the guys has turned classmates into friends, pushing each other to grow and excel together. Every session is not just a workout; it's a journey of self-discovery, discipline, and growth. The facility's cleanliness and professionalism reflect how dedicated Dominick is to provide the best training environment possible. If you're considering starting your Jiu Jitsu journey, Theorem is the perfect place to begin. It's more than a gym; it's a community that supports and uplifts you every step of the way.

Source: Google

★ 5

After just 3 weeks I can already tell a huge difference in my day to day confidence. Highly recommend for anyone that’s on the fence - take the jump and go for it!

Source: Google

★ 5

I’ve been training Brazilian Jiu Jitsu for 11 years now. I have trained in multiple countries and academies. Professor Dominick’s Academy excels in ensuring the safety of their students no matter what age, and I can honestly say I’ve learnt more under his tutelage than any previous Professor. He trains people in a holistic manner: ensuring all weak points are strengthened and genuinely cares about his students progress without the pressure of competition. This school is the perfect balance of gi and no gi and the environment is fun and exciting. I would recommend Theorum Jiu Jitsu to anybody who wants to learn Jiu Jitsu. OSS!

Source: Google

★ 5

Absolutely delighted with my experience thus far with Dominick and Theorem. I'm enjoying continuous progress in increases in mobility and decreases in pain that I hadn't gained from various physical therapists, chiropractors or meds over the years. I look forward to each session. Highly recommended!

Source: Google

★ 5

My son absolutely loves Jiu Jitzu classes at Theorem.
He is gaining self confidence and is empowered with his new self defense skills. I appreciate the small class size. We tried other Jiu Jitzu places and this one is by far the most exclusive.

Source: Google

★ 5

Training with Dom has had such a positive impact on my Jiu-jitsu and my overall performance. Theorem is the only place I would recommend to anyone wanting to learn, improve, and experience Jiu-jitsu. Osss

Source: Google

★ 5

Best Jiu-Jitsu Club in Naples! Dominick is a world class instructor, clear, precise and technical. Jiu-Jitsu has truly been a humbling and amazing experience for me, the lessons that I’ve learned while training with Dominick are not only a test of skills, endurance and being able to perform under pressure, they also translate into life lessons: dedication, perseverance, planning, discipline, resiliency and camaraderie.

At the Theorem Fitness and Jiu-Jitsu Club Dominick offers a wide variety of classes during the week and he also offers membership plans that can accommodate anyone's schedule. The atmosphere is very friendly yet competitive. Dominick’s way of teaching Jiu-Jitsu is unique because he teaches everyone how to properly and safely move your body in order to practice this sport. It’s nearly impossible to leave a class without learning at least one new technique, whether it is mentally or physically.

Source: Google

★ 5

Dominick is a highly
qualified and knowledgeable instructor. He helped me decrease my back pain while I still was able to learn how to maximize my flexibility and grow with my personalized goals. I look forward to learning more from his individualized instruction.

Source: Google

★ 5

Source: Google

★ 5

Highly recommended! Dom knows what he's talking about. He will not only help you improve your jujitsu from a technical prospective, but he'll ensure you do it safely and correctly.

Source: Google

★ 5

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★ 5

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★ 5

Dominic is an excellent instructor and coach. I highly recommend him for your fitness needs.

Source: Google

★ 5

Source: Google

★ 5

Dominick is the ultimate professional. He is extremely knowledgeable and very fun to work with. I highly recommend him.

Source: Google

★ 5

I've met a lot of Brazilian Jiu-Jitsu black belts, but no one teaches like Dominick. He wants you to learn and succeed. He's passionate about BJJ.
He holds himself to a very high standard.
He will teach you not just a bunch of techniques but the underlying principles and the "why" as well.
You won't go wrong learning from Dominick.

Source: Google

★ 5

Source: Google

★ 5

I have trained with Dominick and I can tell you that he has a strong knowledge of both jiu jitsu and overall kinesiology. As much as you care to learn, he can teach you.

Source: Google

★ 5

Hands down the best 👌 practical instruction and knowledgeable beyond average trainers. Reliable and consistent and always willing to go the extra mile

Source: Google

★ 5

Dom is a superb BJJ practitioner and one of the most knowledgeable anatomists out there, which is a killer combo. If you are looking to enhance your martial arts skills, don’t miss the opportunity to take his classes 🤙

Source: Google

★ 5

Source: Google

★ 5

Professor Dom is one of the most knowledgeable coaches I have ever worked with. His teaching methods produce noticeable impact in a very short time.we will certainly miss him at our academy. Florida you have an awesome resource of knowledge and teaching.Congratulations and good luck we look forward to visiting the new school soon!

Source: Google

★ 5

Dominick is one of the best in the biz! I am a professional colleague with a very high standard of who works on my body, and who I trust knows the most about the human body and how to train it optimally. Dominick is one of my most trusted resources as a wealth of information, teacher, and practitioner. His commitment to his clients and his craft is profound and inspiring and it WILL change your life for the best! Go see him!

Source: Google

★ 5

Dom is very knowledgeable and has helped me correct imbalances and improve range of motion. Hip pain and back pain has been eliminated and my prescription of daily movements has been very beneficial to reducing injury and improving performance.

Source: Google

★ 5

I had the opportunity to train under Dom in Brazilian Ju-Jitsu for many years in New Haven, CT He made us all better as individuals and as a team. His attention to detail is by far the best in the business.

Source: Google

★ 5

I got to train with Dominick in Katy! Learned a TON about stretching and ju jitsu!

Source: Google

★ 5

I trained jiu-jitsu under Dominick for many years in CT. He made us all better as individuals and as a team. His teaching and abilities kept us all in the best shape of our lives and performing at the best of our abilities.

Source: Google

★ 5

I have trained under Dom in both mobility and jiu-jitsu, including numerous private jiu-jitsu lessons, and the body of knowledge he brings to both is unique and substantial. I have not encountered many professionals with the ravenous drive and curiosity to identify problems from multiple angles and dive deeply into the littlest details just to figure out what works for a customer's physical attributes and learning style. He does his homework, comes back with new solutions, and he's got a seemingly bottomless pool of ideas if the previous ones don't go as planned. His passion and enthusiasm for solving problems may be unmatched and I have no doubt Theorem Fitness & Jiu Jitsu Club will deliver on every proposition. He creates tailored solutions for every client and I highly recommend working with him.

Source: Google