Marek Kaczmarczyk

Rivermead Leisure Complex and Gym

Reading

72 votes

About Qualifications Specialisms Location Reviews

About

Hey, I’m Marek Kaczmarczyk, a Personal Trainer based at Rivermead. I’ve been in the fitness industry for over a decade, and my passion for health and performance has only grown stronger with time. My journey began with a personal drive to push boundaries, eventually leading me to compete in bodybuilding and proudly step onto the British Championship stage in 2021.

That same passion now fuels my mission to help others transform their lives — not just physically, but mentally too. With years of experience as a personal trainer and hundreds of successful client transformations, I understand what it takes to reach your goals and sustain them.

I specialize in creating custom training, nutrition, and supplement plans tailored to your individual needs. Whether you’re aiming to lose weight, build muscle, compete, or simply feel stronger and more confident, I’ll provide the expert guidance and motivation you need — every step of the way.

I pride myself on being highly educated, constantly evolving my knowledge in fitness, nutrition, and mindset coaching. I go above and beyond for every client, because I believe everyone deserves the tools and support to become the best version of themselves.

Let’s start strong together — come say hello at Rivermead, or get in touch to book your first session. Your transformation starts now.

Qualifications

Level 3 Diploma in Personal Training
Level 2 Certificate in Gym Instructing
Spinning Instructor Certification
Qualified Lifeguard
Certified in Sports & Exercise Nutrition
First Aid & CPR Certified
Hormonal Health in Sport & Performance
Competition Prep & Peak Week Strategies
Strength & Conditioning Fundamentals
Kettlebell Training Instructor

Specialisms

Body Transformation (Physical & Mental)
Fat Loss & Sustainable Weight Management
Muscle Building & Hypertrophy Training
Strength & Conditioning
Nutrition Coaching & Meal Planning
Competition Preparation (Bodybuilding & Aesthetics)
Hormonal Balance & Performance Coaching
Sports-Specific Training & Periodisation
Functional Fitness & Injury Prevention
High-Intensity Interval Training (HIIT)
Lifestyle & Habit Coaching
Supplement Guidance & Strategy
Mindset Development & Motivation
Group Training & Spinning

Location

72 Reviews 72 out of 72

Marek is a brilliant PT, he explains things really well and challenges you within your limits. After a 5 year break from using the gym, I wanted to gain confidence and strength and I am definitely achieving those goals, even after 4 weeks. He makes you feel totally at ease with everything. His nutrition plan has helped me feel more energised too which means I have the energy and drive to exercise again. I'm really glad I chose Marek as a PT, you should too!

Charlotte

Marek took me for an induction. I was used to a gym but the machines were different. Marek was very patient and showed me the correct way to use them and introduced me to machines I’d never used before. He spent an hour with me and is very professional.

Vivien Prince (Smith)

This is the first time that I've actually had a personal trainer and, I'm enjoying the sessions so far.

Marek does more than just make you lift weights, he understands the mental impact as well, which for me, goes hand in hand. With Marek, it's a combination of physical effort, alongside diet/nutrituon and overcoming mental barriers.

I'm currently recovering from injury and Marek is always mindful of that, always checking that I'm ok and that an exercise hasn't aggrevated pain and discomfort. His exercise plan is actually helping me with the other limited exercises that I can currently do outside of the gym.

The physical benefits are there but, the mental benefit has been huge. I highly recommend Marek as a personal trainer.

Farah

Marek has been absolutely fantastic - I’d never been to a gym before and he was patient and understanding yet at the same time still tested my limits and worked a plan to improve both my strength and confidence. I am seeing results after a month and with his experienced coaching and amazing knowledge, he has introduced me to new exercises, routines and machines to help me on my journey. I can’t recommend him highly enough!

James

If you want a work out to get you results but want the experience to be enjoyable and to fly by then use Marek... Focused, fun and results gained. Thanks Marek - best PT I have worked with!

warren

Marek is an amazing PT. Very knowledgeable and experienced.If you are looking for a PT marek is a good choice.

SUYASH

Marek is everything you could want in a personal trainer; knowledgeable, friendly, motivating, and easy to contact.

He has provided me with a workout and meal plan that has seen me lose 7lbs within 4 weeks so far, while also gaining muscle + not feeling hungry. I used to be more nervous about going to the gym but regularly find myself looking forward to our sessions.

Marek is always upbeat and willing to have a chat about your day, while also providing detailed feedback on your form or any questions that you may have about your diet/workout.

I would recommend Marek to anybody looking to make a positive lifestyle change, whether it's losing weight, gaining muscle or fitness.

Stuart

Monster!

I will give him 5 stars!

Velislav

I really enjoy my 1-to-1 PT sessions with Marek. He makes the sessions interesting by introducing me to new exercises and encouraging me to do the ones I don't like by helping me to understand the benefits! He really helped me to get my nutrition on track and provided support and information outside of the gym sessions. I feel more confident in the gym and would recommend Marek as a PT.

Sarah

Marek is a the best PT i have ever used, he has tailored my training plan to meet my needs and goals. Every PT session is enjoyable and challenging.

Stuart

I’ve trained with Marek for a few months, and I couldn’t be happier with the results. From the beginning, he took the time to understand my goals, fitness level, and any limitations I had. Every session was well-structured, challenging, and tailored to my progress, which kept me motivated and accountable.
What really sets Marek apart is his knowledge and encouragement. Whether it’s correcting form, explaining why we’re doing a certain exercise, or pushing me just enough to grow stronger, he strikes the perfect balance between professional and personable.
If you’re looking for a trainer who truly cares and knows what they’re doing, I highly recommend
Marek.

Malini

Marek is an amazing personal trainer! I worked with him for a few months and the results were incredible — he helped me sculpt my body and shed that stubborn fat. His technical knowledge is top-notch, and his approach is super supportive and motivating. What’s really special about Marek is that he doesn’t just feel like a trainer — he becomes a real friend. He’s got you covered with workouts, nutrition, and overall mindset. If you're looking for someone who truly knows what they're doing and cares about your progress, Marek is your guy.

Gosia

Marek is an absolute gem to work with! He has given me such a boost and confidence to just get on with it. Thanks Marek, look forward to signing up to you again in the near future. Sham ☺️

Sham

Super bubbly, full of energy, knows how to motivate! You can tell he really knows what he’s doing. He’s your guy to go to if you’re thinking about getting into fitness.

Csenge

I've been training with Marek for the past 18 months, and the experience has been nothing short of transformative. From the start, He took the time to understand my goals and created a tailored program that evolved with my progress. His consistent support, expertise, and motivation have helped me achieve results I never thought possible. Every session is challenging yet rewarding, and I always leave feeling stronger and more confident. Marek is not just a trainer but a true partner in my fitness journey. Highly recommend to anyone serious about making lasting change.

Sam R

Marek is the best PT. I have had the amazing results since using Marek. Marek is very experienced and makes you feel confident to try new exercises that you may not have previously thought you could do. My main exercise is running outdoors, the strength training plan and advice Marek has given has helped improve my running performance enormously.
Highly recommend:-)

Caroline

From the very first session, my trainer approached my goals with professionalism and clearly explained how we would work together to achieve them. He motivates me to take action, supports me at every stage, and is helping me gradually change my negative habits. I truly feel like I’m in good hands, and with each training session, I can see progress — both physically and mentally.

Ewelina

I’ve worked with Marek for 2 years now and he’s taken me from fat and weak to lean and strong (mentally as well as physically). He looks at your personal journey from all aspects, not just hitting weights but also nutrition, recovery and mental strength. He’s there whenever you need him and also before you know you need him. I owe Marek a lot and will forever be grateful for what he’s done for me. I would recommend him to anyone wanting to make a change in their lives or wanting to bring out the best in themselves - from newbie to experienced gym goer marek has the tools and experience to help.

Andy

A very good personal trainer. He helped me effectively lose excess weight, and the sessions with him are always fun.

Jerry

If anyone is looking for a PT then Marek is the best choice. He is a very knowledgeable and a professional trainer with many years of experience.
100% recommended.

Emoke

Whether you're just starting out or looking to level up, I highly recommend Marek. He take time to correct form, push you when you need it. It's not just about reps and sets, it's about building habits that last.

Zoltan

Marek is most definitely the best personal trainers I have seen around the gym floor for a long time! Someone who is also a personal trainer qualified in nutrition, I can say his knowledge, energy and motivation with clients is 10/10. I have learned a lot by working with Marek, not just from a knowledge aspect but physically where he as corrected form and shown how to execute techniques to avoid injuries and pain. I would highly recommend anyone who is looking to get in shape and find a better relationship with food to reach out to him, his approach is different to others and his energy is always their to motivate you. Our gym is not the same without him! Fantastic coach and always motivated to get the best for his clients! Go smash it Marek!

Jay

I can't recommend my personal trainer enough! He has helped me put on muscle, guided me with my diet, and given me the motivation I needed to stay on track. He's always reliable and has consistently gone above and beyond to help me reach my goals. If you're looking for someone who really cares and knows how to get results, he's the best!

Gary

I would recommend Marek to anyone because he always pushes me beyond what I think I can do. He cares for my personal goals and strives to push me to achieve them.*

Magdalena

Amazing coach ! Very experienced.

Ricardo rosa

I recently attended a training session with Marek, and I’d like to share my experience.
Marek demonstrated a strong understanding of the subject matter, which was evident throughout the session.
He communicated clearly and effectively, making complex concepts easy to understand.
He kept the sessions engaging and motivating, ensuring that everyone was involved.
I saw noticeable improvement and gained valuable skills from his training.
Overall, I highly recommend Marek for anyone looking to enhance their skills in this area. Thank you ?

I can’t say enough about Marek, he’s a fabulous PT and more so someone who is invested in your fitness journey inside and outside the gym. I have been training with Marek for 2 years now and I have even moved gyms to keep up with the personal training, he’s committed, invested in the personal goals and goes above and beyond with meals plans and constant check ins if he thinks I’m falling off plan. He is a constant motivator, energiser to help make things happen! Go Marek!!

Divya

I honestly can't recommend Marek enough! After years of not exercising, I was feeling pretty dejected about my body – a lot of stubborn fat and a complete lack of muscle tone. Marek has completely transformed that for me. Not only have I lost significant fat, but I've also gained an incredible amount of muscle and my body is finally toned in a way I never thought possible.
Beyond the physical changes, which are truly remarkable, Marek has also had a huge positive impact on my mental well-being. His supportive and encouraging approach has helped me feel so much more confident and genuinely good about myself. He makes every session challenging yet enjoyable, and his knowledge and guidance are top-notch. If you're looking for a personal trainer who can help you achieve your physical goals and boost your self-esteem, Marek is absolutely your guy!

Wadi

Marek was very approachable and friendly. Looking forward to working with him some more.

Mei

I’ve really enjoyed working with Marek.
A lot of the benefits you get is driven by the effort and motivation that you bring, but I’ve found Marek’s approach and methodology really effective for me.
Marek brings a clear, knowledgeable and realistic approach to training, gently pushing but not making you feel bad if something slips.
He’s responsive and happy to change the details of the plan if something isn’t working or life gets in the way.
Excellent trainer.

Agata

Working with personal trainer Marek was one of the best decisions I've ever made. Thanks to his knowledge, dedication, and personalized approach, I was able to achieve the best shape and appearance of my life. Marek not only motivates but also effectively guides you toward your goals. I wholeheartedly recommend him!

Michael

Highly recommend Marek for PT! He is enthusiastic and knowledgeable on all things PT. Builds custom plans, pushes you gently to go beyond what you feel are your limits, ever so positive and motivating. I can’t thank him enough for helping me on my fitness journey!

Naina

Marek is extremely attentive and caters to your needs to help you achieve your fitness goals in a sustainable manner.

Rachel

I can’t recommend Marek enough! He’s an incredible personal trainer who truly goes above and beyond. His knowledge of fitness is top-tier, and he has a fantastic understanding of nutrition, which makes a huge difference in getting real results. On top of that, Marek has a really great personality , he’s motivating, friendly, and always makes workouts something to look forward to. Whether you’re just starting out or looking to take your training to the next level, Marek is the person you want by your side. 10/10!

Jomar

Not only do I recommend training with Marek, he’s also who I’ll go back to if I ever need support again.
His advice on nutrition, training, and lifestyle habits was spot on. He knew exactly what to bring to each session based on what my body needed and what my mindset could handle.
He’s a good mix of encouragement, playfulness, and firmness. He truly cares about his clients and goes above and beyond to support them.
So if you’re thinking of working with him, do it. He’ll remind you of who you are, and won’t stop until you remember it too.

Vanessa

I’ve never worked with a more enthusiastic PT.
Marek’s energy is contagious and he always manages to get the best of a session.

I would highly recommend trying a session with him!

Lee

Marek completely transformed my approach to fitness with a tailored meal plan and expertly designed workouts. His clear coaching, unwavering support and attention to detail helped me achieve strength, endurance and confidence I never thought possible. I couldn’t recommend him more highly!

Venod Pillay

I've been training with Marek since his time at another gym in Reading, and even after he moved to a new location, I chose to continue with his program — despite it being a bit less convenient for me — simply because the results speak for themselves!

In just 5 weeks, I’ve lost a stone and seen a noticeable improvement in my body shape. The sessions are challenging but enjoyable, and Marek’s cheerful, positive attitude keeps me motivated every time.

He’s knowledgeable, supportive, and genuinely cares about your progress. Highly recommend his services to anyone looking to transform their body and mindset!

Martina S.

If you’re thinking about working with Marek, stop thinking and just do it – your future self will thank you (probably with a six-pack).

From the moment I met Marek, I knew I was in good hands. He’s not just a personal trainer – he’s your hype man, your accountability buddy, and occasionally, your therapist (especially when you’re mid-squat questioning all your life choices).

He’s genuinely one of the friendliest people I’ve met – no fake smiles or salesy nonsense. What you see is what you get: someone who’s upfront, honest, and seriously knows his stuff. No cookie-cutter plans or BS – Marek takes the time to understand your goals, your body, and your mindset, and then actually helps you get there.

He pushes you in the best possible way – just enough to challenge you but never in a drill sergeant “drop and give me 50” kind of way. Think encouraging, motivating, and lowkey hilarious when your legs are shaking on rep 12.

He celebrates your wins (even the small ones), keeps things fun, and makes you want to turn up even when your muscles are screaming. Honestly, working out with Marek doesn’t feel like a chore – it’s something I look forward to.

If you want a PT who’s real, reliable, and ridiculously good at what he does, Marek’s your guy. Just don’t be surprised when you start smashing your goals and feeling like a legend in the process.

Vanessa Gbadebo

Marek has great knowledge when it comes to training and nutrition, he’s very motivating and really cares about helping people reach their goal. He’s a great coach and friendly guy all round.

Ilger

I had the pleasure of having Marak as my first ever personal trainer. As a 55yr old women I was new and nervous when it came to personal training but Marak was patient, encouraging and very knowledgeable. His support has helped me no end in my independent training sessions. A great trainer in my opinion.

Bhupinder Rai

Marek is not only a great PT who knows the business but also an amazing human with a friendly personality.

I thoroughly recommend Marek, you won’t regret it.

Sofia

Marek is a great PT with a very enthusiastic and energetic approach, which makes you feel at ease! Would highly recommend whether you are a beginner or more advanced in your fitness journey.

Ben

Muscle building or body building or physical fitness. Marek is the name .
He trained me in physical fitness, there were exercises I was doing wrong for many years. He corrected my form and seen results in a few weeks.
He is not just a trainer but makes training a passion. Thanks Marek .

Savio

I definitely recommend Marek to anyone who’s looking to improve their fitness and health. His knowledge and personal approach make every session feel worthwhile. He keeps the workouts fun and different every time. He also helped me massively to improve my diet. Thank you Marek!

Domi

Very approachable and friendly coach! Will always care for your needs and can have a good chat.

Harry

Thank you Marek, for your support and dedication. It was great to have you as my trainer for a year and I still enjoy my results :)
Good luck ?

Yana

Been training with this guy for over a year...he is motivational with diet , exercise and has a positive mental attitude...so enjoy my sessions ...he feels like my friend with added bonus of improving my health, mood and body...you rock Marek

Nikki

Marek,

Just wanted to thank you for your support and your knowledge as amazing!!!
Great session see you next week.

Raj

Very professional and engaging personal trainer he helped me lose 8kg in matter of 2months ! Highly recommended!

Damazy

Marek is a very good trainer and has helped me so much. He is very motivating and helps me with my diet along with the trainings . ??

Steve

I've been training with Marek for a few months, and I couldn’t be happier with the results. Thanks to his support, guidance, and motivation, I’ve hit my weight loss goals and feel stronger and more confident than ever. Every session is challenging but enjoyable, and his knowledge and encouragement have made a real difference. Highly recommend!

Laraina

Marek helped me go to the next level in training.
He takes time to understand your needs and put a plan on place.

A 5 star trainer!

Parli

Marek is a fantastic personal trainer, he listens to your needs and works with you to achieve your goals, would highly recommend.

Karen

Marek is a very professional and motivational trainer! His workouts and nutrition plans are tailored to suit my goals! Would highly recommend Marek!

Nick

Marek has helped me understand the importance of diet, recovery and hormone balancing and it has been a game changer. If you are looking for someone with immense knowledge, he is your man!

Bence

Marek is an outstanding personal trainer who strikes the perfect balance between professionalism and approachability. His deep knowledge of health and fitness is clear, but what really sets him apart is his ability to break things down in a simple, understandable way that makes progress feel achievable. He knows exactly how to push you just the right amount—enough to challenge you without ever feeling overwhelming. Every session is effective, well-structured, and genuinely enjoyable thanks to his great sense of humor and positive energy. I’ve seen real results and actually look forward to training, which says it all.

Ally

I trained with Marek for a few months when I went back to the gym after my pregnancy. He was great, he got straightaway what kind of exercises I needed and he pushed me to do better and better, because he knew what I could do. Marek is friendly, very professional and prepared, he knows his stuff! I would certainly recommend him to anyone who is looking for a PT who can help them get in the best shape.

Gio

I’ve been training with Marek for several years now, and I can honestly say they’ve had a transformative impact on my health, fitness, and overall lifestyle. From the beginning, he took the time to understand my goals, limitations, and preferences, and built a program that was not only effective but also sustainable.

What sets Marek apart is their combination of deep knowledge, professionalism, and genuine care. Every session is well-structured, challenging, and motivating, and I always leave feeling accomplished. Whether it was strength training, mobility work, or cardio conditioning, Marek knew exactly how to push me just the right amount to make progress without risking injury.

Beyond the workouts, he provided ongoing support with nutrition guidance, recovery strategies, and helped me stay consistent even during busy or stressful periods. The results have been incredible — I’m stronger, more energetic, and feel better than I did a decade ago.

If you’re looking for a personal trainer who’s not only skilled but truly invested in your success, I can’t recommend Marek highly enough. Working with him has been one of the best decisions I’ve made for my health.

Jon Appleton

I have been training with Marek over the past year and have genuinely loved his sessions. Marek is very knowledgeable, always making little corrections to form or speed to enhance the efficacy of each exercise. Each session is different so that helps to maintain motivation and focus. Marek is a fun guy to train with so I would definitely recommend you book some sessions with him!

Jill

I’ve been training with Marek for years now, he is an absolute legend of a human and a great PT. I’ve seen awesome results, love his level of engagement, advice, support and care. I know me, my health and fitness are in great hands!

Candice

Marek helped me lose 10kg in just 12 weeks! His training plans were super effective, and he kept me motivated the whole time. He’s knowledgeable, supportive, and really easy to work with. Highly recommend if you want real results.

Srikanth

Every so often in life you come across someone who changes your trajectory. For me this was Marek.

Being healthy is not just a trip to the gym, it's a mindset. Marek embodies this, he has saved me from my old mindset. From advice on workouts, food intake, quitting smoking and taking the right supplements to aid me on this journey. He has changed my life, and I expect he does the same for others too.

Nav

Highly recommend Marek! I’ve been working with him for over a year now and he has really helped the way I view nutrition and diet. He helped curate a diet plan that has worked well for me even through pregnancy. His workout plan has always been tailored to my changing needs (postpartum and pregnancy). He is a very dynamic trainer, very kind, easy to talk to, and patient.

Vanessa

Marek is absolutely amazing, I have had the pleasure of marek doing my personal sessions with me and I have put on mass and bulked up a lot with his guidance and help, very educated and helps in all aspects of health. I have and will recommend everytime. Thank you marek

Mohammad

Marek knows a lot about getting back to the top shape. Best man in Reading for sure!

Dominik Lipinski

Training with Marek has been a game-changer for me. From day one, he’s been incredibly supportive, tailoring both my workout and nutrition plans to suit my goals and lifestyle. He takes time to understand not just your fitness aspirations, but also your habits, challenges, and preferences. Marek’s knowledge, professionalism, and enthusiasm are unmatched—and he genuinely wants to see you succeed. He’s helped me build muscle, improve my diet, and boost my overall fitness in a way that feels sustainable and motivating. Highly recommend him to anyone serious about getting results with the support of a fantastic PT.

Tarik

I have used Marek as a PT for 6 months and enjoy our workouts, which is more than workout- we chat and discuss all manner of subjects, making lifting weights less boring than I would do so (hence I never go to the gym to lift weights, and I need a PT to guide me!). I also get tips on diet and lost 3 kgs in 3 weeks from simple diet siggestions and Marek checking up on my dinners! Highly reccommended for all round experience.

Raj

Marek is exceptional - he is able to fully customise a plan that caters for your specific needs.

Mr Handa

Very good trainer has helped me to go from a 6 to a 10 in a month ??

Alex

very good personal trainer with good experience! 5 Star!

Kamil

Marek is a great trainer! Motivating, knowledgeable, and easy to work with. He really knows how to push you without overdoing it. Marek comes highly recommended from me.

Alex

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