Accessible Personal Training in Amsterdam
Sustainable results for sustainable prices
A proven method combining Personal training, Semi-private classes, and 24/7 online nutrition support + accountability — across 3 locations, led by 25 expert trainers, trusted by 400+ clients.
If you’re tired of starting over…
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Energy dips, clothes don’t fit right, and big gyms feel intimidating.
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You’re busy, want structure, and need accountability that actually sticks.
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You’ve tried plans that worked for a month — then life happened.
What changes with ONE: a clear 360° plan, a coach who cares, and places that feel welcoming — so progress becomes your new normal.
Real People, Real Results
Why ONE? What makes us different?
360° intake, plan & measurements
Proven method with 400+ clients
24/7 personal trainer support
Sustainable nutrition & lifestyle changes
Private, non-threatening spaces
Community that keeps you consistent — workshops, events, belonging
Meet Glenn — Founder
After losing a family member, I committed my work to helping people live healthier, longer lives. We created ONE to be welcoming, non-threatening places where real support meets clear structure.
A place to transform. A place to belong.
Our aim is simple: make sustainable change accessible — training, nutrition, and habits — so you can grow and flourish.
Book a Free Consultation
Our Happy Customers
"Working with Fabian is great! He is more than a personal trainer, he provides you with support and guidelines on how to exercise, eat accordingly, change your habits to reach your goal, while being a great motivator. He is eager to see how your body and mind react to the transformation and always explain you in details the reasons behind all steps you take together. Fabian is also very attentive to your emotional balance and suggests relaxing exercises and techniques. All clients are different and Fabian come up with a tailored plan for anyone."
Antonella
"If you want a gym that will motivate you and help you get to your goals, go to One Institute . 3 months into the program, my transformation is real and i am in the best shape of my life... Yes you do need to put the work in, but the guidance, tools and vision you receive from One will help you get there."
Ayoub
"I’ve been training with One from the beginning and it has been nothing less than a positive transformative experience. Their secret sauce? Not focus on the physics aspects of the individual but a holistic approach that includes everything that affects one’s life: work, sleep, stress etc. The result: a deeper more meaningful relationship that transcends the traditional 2-3 hour relationship you might have with your PT."
Engin
"I have a new relationship with my body’s since joining ONE. I learnt how to make better choices eating, drinking and what impact those choices have on my physical and mental well-being. The training plan is tailored to me. Every move makes max effect on my body. I see the difference every day as I look in the mirror. More toned, stronger, 8kg less body weight, more muscle, less fat."
Alexis
"Glenn is a very dedicated personal trainers who want the best for their clients and always look at you and your situation in a holistic way. I train with Glenn since 3 years through different life stages and no matter where I am at Glenn always tries to find the best solution for training, nutrition and mindset. I can highly recommend ONE and I'm proud to be part of the community."
Sandra
"I highly recommend Glenn at ONE for his full programme transformations. I've never done weight training before, I exercise a lot, however Glenn has really shown me how this type of exercise is so beneficial for your body shape. Alongside the nutrition advise and coaching I've now finally lost most of the weight gained during pregnancy. Highly highly recommended."
Katie
Kickstart your new lifestyle at ONE - Human Performance Institute!
About ONE - Human Performance Institute in Amsterdam
ONE – Human Performance Institute has been helping members get fitter and healthier since 2015. Our team of experienced trainers are happy to guide you to your new lifestyle. All members start with a Free Intake so everyone can experience why ONE – Human Performance Institute is your partner for fitness and lifestyle. Or do you first want to discover what suits you best? Then start by taking the Online Membership Test.
Frequently Asked Questions:
- Is 2×/week really enough?
Yes — our progressive method focuses on what moves the needle, supported by nutrition and habits. - I’m nervous in gyms — will I fit in?
Absolutely. Our places are private, friendly, and non-threatening.
- Do you really offer 24/7 support?
Yes — your trainer is available for questions and guidance between sessions.
