Results that last

Our private training system in Amsterdam delivers real, lasting results.

What we believe

We believe that human strength is the foundation of a thriving society. By setting a new professional standard for private training, we bridge the gap between individual growth and collective progress.

Clients served1400+
Locations4
Trainers30
Total transformations534+

500+ members training weekly.

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

Franca Cumbo, 54

Semi Private Training Basic

  • Lose body weight
  • Become more toned
  • Feel more energetic

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

Olga Pakholiuk, 33

Personal Training Basic

  • Improve posture
  • Build muscle

Rick Luger, 36

Private Training Basic

"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

Barbara van Erp, 56

Giulia Battaglia, 33

Louise Schalkwijk, 49

Semi Private Training Premium

  • Lose body weight
  • Become more energetic
  • Move better

"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

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

Siobhan D'Abreu, 30

Personal Training Basic

  • Improve overall health
  • Mental well-being
  • Muscle building

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

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

Barbara Van Erp, 56

Personal Training Basic

  • Improve health metrics
  • Lose body fat

Mirjam Schuele, 45

Private Training Premium

Watch real member stories

Hear how real lives have been changed training with us.

Barbara van Erp

Your story could be next

Meet a coach, see the space and get a personalised plan.

Rafael Cabral

Sales Manager

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