The Personal Trainer in London 

Body Transformation London

6 week body transformation london - Before and after - Samir

Body Transformations London

You are unique and your personal training and nutritional advice should reflect this, especially if you are looking to transform your body.

We stay in our lane, we only work with Body Transformation clients as this is our speciality, helping people to lose fat, build muscle or both.

Our Body Transformation results are built on providing bespoke personal training and diet plans for our clients that provide unique solutions to their fitness needs.

Tailoring our approach to the individual, we put the Personal in Personal Trainer, by fitting the approach to each client as opposed to trying to shoehorn our clients into an approach that doesn't fit their lifestyle or that they simply do not enjoy.

Click here to to see our Personal Training Body Transformation results

12 week body transformation london - Before and after - Sam

Personal Training in London

Founded by London Personal Fitness Trainer James Cronin, Rockstar Fitness was born from a desire to help people take back control of and transform their bodies by providing the very best personal training in London.

Our Personal training programs will turbocharge you by providing exercise and nutrition advice specifically tailored for you, advice that, if followed, will make you the leanest, healthiest and most energetic you have ever been. 

We want your friends and colleagues talking about you as the "lucky" guy or girl who seems to be able to eat what they want and still have a lean, toned body, in fact we want them asking your who your personal trainer is. 

You are investing in your physique, health and well being when you engage our services, we understand that and we mean to provide you with a return on that investment that goes far beyond a body transformation.

Click here to find out more about our Personal Training packages.


10 week body transformation london - Before and after - Duncan Photoshoot

What is a successful Body Transformation?


We only view our Personal Training and Body Transformation results as successful if they adhere to specific criteria.

  1. The Personal Training client must have improved their body composition, this means they have to have lost fat, gained muscle or both.
  2. They must become healthier, a body transformation is simply not worth it if you are dieting or training to the point that it becomes detrimental to their health.
  3. The client must become more vital, When you engage a personal trainers service you shouldn't end up feeling lower in energy, becoming more energetic and capable should be the norm.
  4. The client should not develop any fears or worries about eating certain foods, they should feel comfortable including foods they enjoy in their diet and our nutrition advice and coaching will help to teach them how whilst rapidly transforming their body.

Want to learn more? Check out our Personal Training Services, Click here!

12 week body transformation london - Before and after - Rebecca Photoshoot
Personal Trainer in london -James Cronin

James Cronin

Founder Rockstar Fitness

James Cronin has been a Personal Trainer for nearly a decade and from the moment he first decided that he wanted to be a personal trainer he knew that he wanted to help people achieve life changing body transformations.

Having worked in the hustle and bustle of the busy commercial gym environment,  he transitioned to private gyms by moving to London to work for body transformation specialist Ultimate Performance London where he spent close to three years honing his craft and developing his skills in both one to one 12 week transformations and online personal training.

He now runs his own London Body Transformation business from a private personal training gym near Liverpool street


Check out what our clients are saying, Click here!

Online Personal Trainer

If you can't make it to train with us in London but you still want a stunning Body Transformation you should check out our Online Personal training Packages, We have worked with clients all over the world so there really is no excuse for not getting in the shape of your life.

For more info about working with an Online Personal Trainer click here!

Ready to start your own Body Transformation? Book now!

It only takes a few seconds to book a free telephone consultation with us and find out how Personal Training  with us can help you achieve that Body Transformation....... just hit the button.