Barbara van Erp, 56
One decision. Lasting results.
Everyone sees a part of you. We see the whole picture: training, nutrition, sleep, stress, and the life it all has to fit into. Human Performance. Based in Amsterdam
You’re taking care of everything: except, sometimes, yourself.
Work, family, and responsibilities come first. Your own health gets whatever time and energy are left.
You can get started. It’s staying consistent that’s hard.
When life is going well, so is your routine. When things get busy, it’s often the first thing to slip.
You’ve tried to figure it out, but there’s too much conflicting advice.
Train more. Eat less. Sleep better. Stress less. You know the advice, you just need to know what actually matters for you.
You’ve tried before, so you’re understandably cautious about trying again.
You don’t need another short-term fix. You need an approach that works with your life, and keeps working when life changes.
500+ members training weekly.
Rick Luger, 36
Private Training Basic
Giulia Battaglia, 33
"After my stage 3 cancer diagnosis, four months of coaching with Serva helped me make peace with my body, reconcile with a sister I hadn't spoken to in ten years, and face treatment as an adventure instead of something happening to me."
Beverly
Olga Pakholiuk, 33
Personal Training Basic
- Improve posture
- Build muscle
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
Siobhan D'Abreu, 30
Personal Training Basic
- Improve overall health
- Mental well-being
- Muscle building
"After years of therapists and psychiatrists, working with Serva was the first thing that actually helped me move forward — by finally feeling safe enough to be vulnerable."
Private client
Franca Cumbo, 54
Semi Private Training Basic
- Lose body weight
- Become more toned
- Feel more energetic
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
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
Jonathan Butler, 31
Personal Training Premium
- Improve overall health
- Muscle building
- Weight loss
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
Jurriaan Puijpe, 31
Semi Private Training Premium
- Lose body fat
- Gain body mass
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
Louise Schalkwijk, 49
Semi Private Training Premium
- Lose body weight
- Become more energetic
- Move better
Mirjam Schuele, 45
Private Training Premium
Everyone sees a part. We see the whole picture.
A 360º approach
We bring your training, lifestyle and context together into one system.
Your whole picture, in one dashboard
24/7 support & accountability through our app
Caloric Burn1234 cal
Lean Body Mass70.65 kg
Blood Pressure120/80
Speed32km/h
Specialist trainers
Guided by a specialist who knows your body better than you.
Structure that holds
Progress that doesn't reset when life gets busy, because the plan accounts for your real life, not just the workout.
One Tribe
Train in a private, non-intimidating space alongside people who hold the bar high.
Founded with a purpose
After losing a family member, I understood that health cannot wait. I built ONE to be more than a gym. A place where real support meets real people. So you progress in real life.
One.Journey
We look at where you are now. Training history, lifestyle, nutrition, sleep. Your plan starts here.
Together we decide what success looks like. Clear targets, specific timelines, built around your life.
Your training and nutrition plan is built around your goals, your schedule and where you start. Adjusted as you progress.
Regular check-ins and measurements keep your progress visible. Your coach uses the data to keep your plan sharp.
Between sessions, your trainer stays close. Questions answered, adjustments made, accountability kept.
Choose a membership
Personal Training
One-on-one coaching built around your whole picture: training, nutrition and lifestyle, working together instead of apart.
- One-on-one sessions with your dedicated coach
- 360° intake: training, nutrition and lifestyle
- 24/7 support and accountability
Semi-Private Training
Personal coaching in a small group, built around consistency, structure and a community that pushes you forward.
- Small group sessions with expert coaching
- 360° intake: training, nutrition and lifestyle
- 12-week plan of action, built around your goals
One community
At ONE, you train alongside people who are serious about their progress, in a space built for real connection. One tribe, working toward the same standard.
Our locations
Vondelpark
Tesselschadestraat 1D 1054 ET Amsterdam
Weekdays: 7:00 – 21:00 Weekends: 9:00 – 14:00
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Prins Hendrikkade
Prins Hendrikkade 176 1011 TC Amsterdam
Weekdays: 7:00 - 21:00 Weekends: 9:00 - 14:00
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Groenburgwal
Groenburgwal 9G 1011 HR Amsterdam
Weekdays: 7:00 - 21:00 Weekends: 9:00 – 14:00
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Find a location
Get started today from €329,- per month
Membership plans starting from only €83 per week.
Have a question? Let us help.
Yes. You can pause for up to 4 weeks per calendar year, taken as 2+2 weeks or 4 consecutive weeks, with 4 weeks' notice. For cancellation: cancel at the end of your first 4-week period with no notice. After your second period begins, we ask for 4 weeks' notice. Both are handled in the Trainin app. (Note: pausing doesn't apply to one-off Flex packages.)
Our group classes are our Semi-Private Training (SPT) sessions: small-group, coach-led, and structured around twice-a-week training. Beyond that, we run community events and the occasional challenge or competition, like the ONE Open, but SPT is the core class offering.
Personal training is included in all three PT memberships — Basic (8 sessions), Premium (8 PT + 4 SPT), and Platinum (12 sessions). It's also part of the Semi-Private Premium membership (1 PT session per month) and available as a standalone PT Flex package.
No, you don’t need any experience. We build the confidence, knowledge and strength from the ground up.
Book a free consultation by leaving your details. Our Customer Success Team will reach out and set it up. In this call you will talk through your goals, what's motivating you to change, and what's held you back so far.
Semi-Private memberships run from €329 to €399, and Personal Training memberships from €789 to €1,149. Billing is every 4 weeks rather than monthly, with the first payment due before your intake session. Flex packages (one-off) start at €675 for SPT and €1,650 for PT.
There's no strict minimum, but our standard memberships are best suited to roughly 20–75 years old. We don't recommend targeted, machine-based strength training under the age of 12, bodyweight work is the better approach at that stage. For younger people we run our Stronger Future programme, and for those 65 and over we have our Golden Age class. Both are free, our way of giving back to the community.
