COVID-19 Update: The health and safety of our clients and staff is our top priority. Read our full update here.

Enquire now

Select A Country


Zrinka Loses 30kg in 20 Weeks to Feel Happy, Healthy and Confident Again

Losing an incredible 30kg has helped Zrinka become happier, healthier and more confident than ever.

She had struggled with her weight for years, piling on more than 45kg in the five years since she moved to London.

Unhappy with her body, she tried everything to lose the weight, but nothing worked, and she ended up gaining even more weight than before.

Feeling constantly tired, lethargic and low on energy, Zrinka went to the doctors for a check-up fearing she had diabetes – but what her GP found was dangerously high cholesterol levels.

This was the moment Zrinka decided she needed to make huge and lasting changes to her lifestyle, and she has never looked back since.

Despite never lifting weights before, in just 20 weeks she dropped three dress sizes and achieved her stunning 30kg transformation at Ultimate Performance London City, taking with her the knowledge to carry on her fitness journey for life.

“Every time I get into the ladies dressing room, everybody is like ‘wow! I cannot believe how much you have changed!’

“It’s just amazing – 30kg in 20 weeks!

“I don’t know where else you could actually get results like these! It sounds nearly impossible, and yet I’m here and I’ve done it.”

Zrinka explains the diet mistakes that had held her weight loss back in the past, and what changed when she came to U.P. to lose the weight and radically change her lifestyle for good.




Where did your transformation begin?


I started about 20 weeks ago. Why I decided to do this was because I was in quite bad shape. I had gained 45kg since moving to London in about four or five years.


It was really bad shape. I was very unhealthy. I was very uncomfortable with my body; it was just not me.


I started looking at U.P. and I found an ad in the British Airways magazine and I kept on looking at it every time I was flying.

Then I contacted U.P. but I saw it was ridiculously expensive so I thought ‘I’ll do something on my own.’ Of course, I failed quite miserably.

Eventually, I decided to do that. Then here I am today and I’m happy I’m doing it.


What was diet and lifestyle like before you started at U.P.?


It was quite bad. My husband is a vegetarian, so I started eating carbs. Everything was carb-based. It was pasta, rice, pasta, rice, all the time. No protein whatsoever.

It was very greasy and rich food. I guess it was one of the reasons it made me gain the extra 45kg.




How did being overweight affect your life?


I was very lethargic. My work requires lots of travelling long hours, so I was just constantly tired and out of breath. I didn’t have any energy for anything.


I just didn’t want to do anything. I would come home around 9 pm and go straight to bed. It was pretty bad.


What were your motivations for finally taking action taking that first step with U.P.?


I think it was about May time, after failing miserably on my own diet. I went to the GP to check if I had diabetes because you never know with gaining so much weight in such a short time. I wanted to see why I was gaining so fast.

I was completely ignoring the fact that I was eating so many carbs and trying to blame everything on something else – that it was not me that caused it, but something else. Something genetic.

Luckily, I did not have diabetes, but I had ridiculously high cholesterol. It was way off the charts.


It got me quite scared. I thought ‘I’m going to die of a heart attack.’ It’s not normal. I’m 33 years old, I shouldn’t be living life as I am.


Then I decided, that’s it! I can’t do it on my own. I need professional help and someone to guide me.


What other areas of your life do you think U.P. has helped you with?


Everywhere. That hour that I do, it’s like ‘me’ time. We all have stressful jobs and personal life, so having that hour to focus on myself, it’s amazing. It helps me mentally, first of all.

And I have so much more energy. I think I’m a lot more productive at work. I’m no longer lethargic. I don’t struggle with heavy breathing when I go up stairs. It’s just amazing what U.P. has done for me.




What would you say to someone who was thinking about doing a transformation at U.P.?


Do it! Don’t wait. Don’t think about money. Just do it right away. Because basically I started in August, but I first contacted U.P. in the November before.


In that time, I actually gained another 10kg. If I’d have started when I wanted to initially, and not been so cheap, I would have had a much better start than I did when I actually started.


Just do it. If you’re there on the webpage and you’re impressed with the results, which you most probably will be, just go and do it right away.


What is next for you?


I will definitely continue doing what I’m doing. I still have 20kg to lose. It might take me six months, eight months, it doesn’t really matter.

But I definitely will continue doing what I’m doing. It’s put me on the right path. I definitely don’t want to go back to where I was.

I was given some advice – keep some of my big clothes, because when I started I was size 20 and now I’m size 14.

Keeping something from that period nearby means you can always check and think ‘this is the place I never want to go back to.’

So I’m sure I will continue this for life.



  • We show you the best, we don't show you the worst.
  • We show you people who follow the plans, not those who are all talk.
  • We show you those who inspire even us with their commitment to their results.
  • You cannot get results exactly like these. You are unique and that means you can only get your own best possible results.
  • Your results are a function of time spent following the plan; your genetic response to the right exercise and diet program; how hard you train; how consistently you come to the gym; how disciplined you are with your diet; & your starting point.
  • Oftentimes the lower your starting point (poor fitness, terrible body composition) the better your results.
  • We cannot do the work for you and the results you see here are a testament to the work ethic of our clients.
  • Our reputation is that we are the best trainers in the world for helping you to unlock your potential, & we can lead you to the door, give you the key, even turn the handle and push the door open, but we cannot walk through it for you.
    In the end the result is down to you.

Like these results? Send us your details in the form below to receive information about our programs

DISCLAIMER | Results may vary | Results are based on individual circumstances | Timeframes for results are not guaranteed | Willpower is always required!

Enquire now

For more details and pricing information

United Kingdom
  • United Kingdom
  • United States
  • Europe
  • Middle East
  • Asia
  • Australasia
Choose Your Region First
  • Choose Your Region First

Tell us where you are

We are looking to expand our number of gyms in several locations around the globe. Register your interest in having a U.P. gym in your city.

North America
  • North America
  • Africa
  • Asia
  • Europe
  • Caribbean Islands
  • Central America
  • Middle East & North Africa
  • Oceania
  • South America
United States of America
  • United States of America
  • Canada
  • Cuba
  • Greenland
  • Mexico
  • Puerto Rico


Personal Training
  • Personal Training
  • Online Training
  • General Enquiry
  • Group Training
  • General Membership



By submitting this form, you are providing consent to receive communications from Ultimate Performance regarding your enquiry.


Save time and money, get our best content and offers before anyone else, direct to your inbox.



Privacy Overview
Strictly Necessary Cookies

Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.

Strictly Necessary Cookies

Strictly necessary cookies should be enabled at all times so that we can save your preferences for cookie settings and for basic functioning of the website.