Why BTX?

We’re deeply invested in helping you become the version of yourself you never thought you could be.

The person who demands respect in every room they walk into.

The person who turns heads as they walk down the street.

The person who brings infectious energy into their work, relationship and life.

Core BTX Ingredients

BTX personal training business for high-end professionals emerged from a passion for creating a platform that enables individuals to achieve success in all areas of their lives. There are 5 core ingredients to our methodology:

Clear Plan

With us, You will always have a plan to follow and know exactly what to focus on.

Effective Training

We will teach you all you need to know about training and nutrition so you can make smarter choices for the rest of your life.


You will be held accountable with personalized targets and private check ins to ensure your continuous progress.

Supportive Team

You will never get stuck and you will always be a message away from getting all the help you need.​


You will be part of a thriving like-minded community that lifts your standards and wants to see you reach your goals.

Are you ready unlock your potential?

Helping You Feel, Look And Perform At Your Best

About BTX

We help people build real confidence by developing a strong body and a powerful identity. BTX coaches are known for perfecting every aspect of fitness and well-being to help successful professionals feel, look and perform at their very best.

Our Team

Meet the team of personal trainers who are passionate about helping you become the best version of yourself.

Our Founder

Learn more about our founder and CEO, James Cooper, an expert in nutrition and body transformations.

What People Are Saying

See how we have helped hundreds of clients with their persona training and body transformations.

thomas allwood
thomas allwood
13 July 2023
Best gym in London for transformation. Facilities are first class and trainers are best in class - Mariyan has been quality. Fully recommend
Vlad Andrei
Vlad Andrei
17 June 2023
My experience with Btx as well as with Reshma is amazing so far, having the guidance and involvement from the team at Btx is an amazing thing, I have been able to see result while training with Reshma within the first 3 weeks as she is such an amazing person as well as a experienced trainer, she pushed my limits while also taking care of my previous injuries, the diet was a bit hard at first but she was very opened to give me some tips on how to make it easier, I would say from personal experience with Btx as well as with Reshma that they are a devoted team and as long as you have the commitment and the proper support from people working the Btx team you will get where you want in terms of your goals.
5 June 2023
3 weeks in and I feel so much better already. Have had a great experience training with Reshma so far. Always pushing my boundaries and really ensuring that my form is correct. Very glad to have signed up!
Chris Fairclough
Chris Fairclough
24 May 2023
I have always been able to accomplish anything I put my mind to but getting into shape has been the one obstacle I’ve always struggled with all my life until I met James Cooper at Hampstead personal training. James knows his stuff from nutrition to training and motivation. I can’t recommend him enough… Not only am I getting into the best shape of my life I’m seeing the nutritional and health benefits also. It’s the best investment I ever made. Thanks, JC for all your help!
Pete M
Pete M
17 May 2023
the best in all of London. I had tried almost every diet out there and I'm relatively in shape but just struggled to stay consistent diet-wise. since I started I've noticed increases in strength, speed and my body composition is changing too. My gas tank is also so much better and I'm able to row and train in bjj for long periods of time. I'm also not shying away from foods which has helped me to stay consistent. I now look leaner but fuller at the same time. Can't recommend highly enough
nigel salem
nigel salem
1 May 2023
BTX has really helped me to achieve sustained and effective training based on focused nutrition. Their dedication and commitment really shines through, which creates a positive and enjoyable experience. They want the results as much as you do and will work out the best route to those goals! Along with Giuseppe, James and the rest of the team I would highly recommend this camp to anyone serious about making a real change.
Danielle Vides
Danielle Vides
27 April 2023
It is now a month since I started with Reshma. Wasn't too sure how BTX was going to help me as I have been a gym nutter for over 40 years and think I know it all! Well, I was in for a surprise, Reshma is brilliant, with small little changes to my technique, I have managed to shift 1/2 a stone in weight along with my recommended eating programme. She is incredibly knowledgeable on recipes, on eating well, on trying new products and as a vegetarian, she has helped me up my protein which I think I have suffered a deficiency of for years. Forget the days of post menopause tummy - I am heading for my six-pack - Reshma you are one amazing trainer in every sense!!
Lorenzo Bernaudo
Lorenzo Bernaudo
10 March 2023
I have started a body transformation plan 3 months ago with PT Giuseppe Marchesani member of the BTX team,I must say I have never felt so good into my life! In about 3 months I lost 10Kg obtaining a great muscle definition as a first part of the program,before the bulking phase. I am very grateful to have Giuseppe as my PT: he weekly monitors my weight and definition,updating weights exercises etc. Giuseppe is very reliable and professional. He but also James and all the others from BTX know very very well what they do and how to tailor the program to each person. Highly reccomended!
10 February 2023
I’ve been working with Giuseppe for two months now and have already achieved progress I couldn’t do in two years on my own (consider myself advanced at the gym). You need a coach who has the knowledge base to help you be as efficient with time and energy to reach your specific goal (it’s not just about going to the gym everyday). The team are friendly where you can be open with your challenges for them to really help tailor a programme for you (including weight sessions, cardio, diet, nutrition and supplements) Anyone looking to change their body (and mindset) should look no further. Assaf
matt graham
matt graham
13 December 2022
I've worked with a few fitness coaches over the last 10 years or so and can honestly say that Giuseppe, James and the team in North London are absolutely elite-level. I have achieved the best results in the 20 years I've been training since I started working with Giuseppe. The attention to detail in the personal training sessions themselves as well as nutrition, supplementation and no BS general advice set these guys apart. Coming from a military background i thought I was training well and knew what I was doing, but there are levels to this and the BTX team is at the pinnacle of their profession. There are many snake oil salespeople in the world of fitness but these guys are the real deal, absolute experts - by using simple, effective and sustainable systems my results have been supercharged and I'm in the best shape of my life. I initially signed up for a 12-week transformation - but now that I've found BTX I'll absolutely be working with them on a permanent basis. Excited to see the results we can achieve long term. Thanks, Giuseppe and team.
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