Iris, 33
-7 kg fat mass, deadlift 60 to 100 kg in 12 weeks, 3x/week, next to a full time job.
Feel strong again in 8 weeks.
We are ONE, a boutique personal training hub in Amsterdam with 3 locations. Build back your strength, energy and confidence in 8 weeks. Only 20 spots, starting October.
FREE ATHLETE ASSESSMENT Find out where you stand
One.athlete assessment
We look at scientific evidence to see where you are now compared to your peers. Your plan starts here.
Measure key health markers to understand the bigger picture behind how you feel and perform.
Understand how well your body handles effort and recovers.
Get a clearer picture of your muscle, body fat and physical starting point.
Assess your muscle development and identify where there’s potential to build more lean mass.
You used to train more consistently, but life got in the way.
You want to lose some weight and feel comfortable in your body again.
Your energy isn't what it used to be.
Work takes a lot out of you and your own health keeps moving down the priority list.
Real people Real results.
Mozart, 42
Personal Training
- Lost 50kg
- 104weeks
Rick, 36
12-Week Body Program. Fat Loss
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
Lous, 35
12-Week Body Program
- Lost 10kg
- Build muscle & tone
WE ARE ONE.
ONE is a personal training hub in Amsterdam with 3 locations across the city, built for people who want more from their health than just another gym membership.
We combine personal training, nutrition, lifestyle coaching and ongoing support into one approach built around you, your goals and your life. No crowded gym floors. No figuring it out alone. No one-size-fits-all programs.
Just expert coaching, a clear plan and a team that knows you by name.
One team. Three locations. Everything you need to feel strong again.
YOUR FIRST STEP.
1:1 assessment with a ONE expert
We discuss your goals, your current situation and what's been getting in the way.
5-metric body assessment
Get objective insight into your current starting point.
Your personal Athlete Assessment
Your results come together in one clear personal report.
Caloric Burn1234 cal
Lean Body Mass70.65 kg
Blood Pressure120/80
Speed32km/h
Your 8-week recommendation
Based on your assessment, we determine what you should focus on during the next 8 weeks. No guessing. No generic plan. A clear starting point.
The end result
We do everything possible to get you in the best shape of your life. With dedicated trainers and a proven method.
WHAT HAPPENS DURING YOUR 8 WEEKS?
Structured coaching based on your starting point, ability and goals.
Practical guidance that fits your goals without turning your life upside down.
We look at the habits outside the gym that influence how you feel and perform.
Expert guidance so you always know what to focus on next.
Because knowing what to do and consistently doing it are two different things.
We measure your progress so we can see what's working and adjust where necessary.
Founded with a purpose
After losing a family member, Glenn understood that health cannot wait. He built ONE because he believed people needed more than another gym, another workout or another short-term fitness program. They needed a place that looks at the whole person. A place where training, nutrition, lifestyle and coaching work together and where someone genuinely cares whether you're progressing.
A smarter way to train
Most fitness offerings focus on one thing. ONE brings everything together.
Our trainers
Every trainer at ONE works within a structure. They're mentored, supervised and held to the same standard we hold our clients to. Each week, the full team reviews results across the board: who is progressing, who needs more support and how we adjust. You don't just get a trainer. You get the whole team, applying the ONE Method.
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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Albert Cuypstraat
Albert Cuypstraat 33 1072 CL Amsterdam
Opening October Weekdays: 7:00 - 21:00 Weekends: 9:00 - 14:00
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Find a location
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.
Simply 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.
No problem, your plan flexes around it. You get 4 weeks of pause per year, and your coach adjusts the remaining weeks so you don't lose progress.
You keep going, if you want to. Most people roll straight into a regular membership once they see what 8 weeks of structure actually does to your health.
Yes, you can, but this month we are offering a free athlete assessment and we've only got 20 spots available. Training works whenever you start, but the sooner you begin, the sooner you’ll start feeling stronger and healthier.
You can expect to feel stronger, move better, have more energy and build a more consistent training routine. You may also feel better in your clothes, leaner, stronger and gain a clearer understanding of what your body needs. Individual results depend on your starting point, goals and consistency.
All our coaches speak English (plus other languages) not everyone speaks Dutch.
8 WEEKS FROM NOW...
You could still be thinking: "I really need to start training again." Or you could already be 8 weeks into becoming stronger, fitter and more in control. You don't need to wait until January. You don't need another perfect moment. You just need to start.