Fat loss
A structured training and nutrition system that creates real, sustainable fat loss. Without crash diets or unsustainable routines.
Designed around your goals
We connect your training to what actually matters to you and build a complete system to get you there.
Explore by goals
Whatever brought you here; weight, energy, performance or recovery. We build a program around it. Choose your goal and see how ONE approaches it.
Build muscle & strength
Progressive, evidence-based strength training. We track your load, progression and recovery so every session builds on the last.
Energy and vitality
Feeling drained despite doing everything right? We look at training, sleep and stress together and build habits that restore your energy.
Stress and burnout
Movement is one of the most effective tools for managing stress. We build a programme that supports your nervous system.
Peri-menopause
We build a programme around peri-menopause changes; focused on maintaining strength, energy and consistency through every stage.
Return from injury
Structured rehabilitation through strength. We work alongside your recovery timeline to rebuild movement, confidence and capacity.
The whole picture in one package.
A 360º approach
We bring your training and lifestyle together into one integrated system.
Keeping you on track
24/7 support & accountability through our app
Caloric Burn1234 cal
Lean Body Mass70.65 kg
Blood Pressure120/80
Speed32km/h
Specialist trainers
Sessions built around your life. Guided by specalists who know your whole picture.
Sustainable results
No quick fixes. Progress built on structure that holds when life gets busy.
Community vibe
Train in a private, non-intimidating space alongside people who hold the bar high.
A smarter way to train
Most fitness offerings focus on one thing. At ONE we focus the whole picture in one place.
A holistic approach that gets results
Training is just one part of the picture. We account for your work demands, sleep quality, stress levels and daily habits. Because lasting results require the whole system working together. Our methodology is built on evidence, refined through 1,400+ members.
Meet the team
At ONE, your progress is a team effort. Every week, the full team reviews which clients are on track and who needs more support. Behind every trainer is a mentor. Behind every mentor is Glenn. You don't just get a coach. You get a team with a proven method, built to get you where you want to go.
1,000+ members training weekly.
In just six months, I’ve lost weight, built strength, and achieved more than I thought possible. This gym’s professional approach, personalized programs, and supportive environment make it a great choice for anyone serious about their fitness goals.
Giulia Battaglia, 33
Barbara Van Erp, 56
Personal Training Basic
- Improve health metrics
- Lose body fat
Rick Luger, 36
Private Training Basic
Came back to training after a long break (and I’ve been working out for years) and honestly ONE has been the best training I’ve ever had. In just 3 months I’ve had amazing results, proper body recomposition and I feel stronger/leaner already. The sessions really push you, but in a good way and it actually works.
Panos Ellinas
Barbara van Erp, 56
Jonathan Butler, 31
Personal Training Premium
- Improve overall health
- Muscle building
- Weight loss
Training at One has genuinely changed my life. I don’t just feel physically better than I ever have — I’m emotionally stronger too. The trainers here are incredibly dedicated; they truly understand life’s challenges and know exactly how to adapt your program to get the most out of you, even on days when you’re exhausted or emotionally drained. The environment is wonderful. Everyone is friendly, and you can tell people genuinely want to be there. It’s an incredible place, and I’m so grateful I found it. Highly recommend to anyone looking for more than just a gym.
Natalie Wills, 44
Giulia Battaglia, 33
Franca Cumbo, 54
Semi Private Training Basic
- Lose body weight
- Become more toned
- Feel more energetic
Joined ONE at the end of March and it’s honestly been one of the healthiest changes I’ve made this year. What I appreciate the most is how sustainable the approach feels — not just “go hard at the gym”, but actually building habits that fit my real life structure. A definite additional call out is for ONE environment which is welcoming, motivating and grounded. Very happy I started this journey here.
Gabriel Martins, 41
Siobhan D'Abreu, 30
Personal Training Basic
- Improve overall health
- Mental well-being
- Muscle building
Love this gym! The vibe, the concept and the energy - all spot on. It is the most inspiring and supportive workout community I have been part of.
Eerika Roos-Kulvik, 35
Jurriaan Puijpe, 31
Semi Private Training Premium
- Lose body fat
- Gain body mass
This place is more than just a gym; it’s truly a life-changing space. I’ve been training here for two months now, and I never imagined I would get this committed to my fitness journey.
Erdal Aydin
Louise Schalkwijk, 49
Semi Private Training Premium
- Lose body weight
- Become more energetic
- Move better
I’ve been blown away by my experience at One. It’s a gym that feels personal, like an actual community. When I started doing private sessions with my trainer, I immediately felt how closely my progress was being monitored to make sure I had the tools to succeed. You’re not just clocking into a class and clocking out. There are real people here who genuinely CARE about your success.
Melyssa Griffin, 37
Olga Pakholiuk, 33
Personal Training Basic
- Improve posture
- Build muscle
Mirjam Schuele, 45
Private Training Premium
Get started with a free consultation
Book your visit and see how training, lifestyle and context come together in one system, built around you.
- Completely free
- No pressure or commitment
- 30-minute personalized session
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