Sustainable weight loss with Bye Bye Belly Plan
It’s the beginning of your strongest, leanest, most confident self. And we’ll coach you there.
✔️ Lose visible fat in 10 Weeks
✔️ 24/7 nutrition & accountability support
✔️ Personal coaching & Semi private training
Start the Year with Structure - Become the Best Version of You
At ONE Human Performance Institute, we don’t just train bodies, we help people transform their lifestyle.
Whether your goal is weight loss, more energy, or finally feeling confident in your skin. We’ll build a program that works for you. You can start working with one of our personal trainers from €66,75 per week.
Fill in your goal(s), details, click ‘Next Step,’ and answer 4 short questions (only 1 minute to complete).
We will contact you personally within one business day with all (pricing)information.
What our members say about us
More than a personal trainer
"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 comes up with a tailored plan for anyone."Antonella
In the best shape of my life
"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
Holistic approach that includes everything
"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."Alexis
Toned, stronger, 8kg less body weight
"I have a new relationship with my body since joining ONE. I learned 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."Sandra
Proud to be part of the community
"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
Never done weight training before
"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
What’s Included in the 10-Week Bye Bye Belly Plan?
Just 3 Hours Per Week - Built for Busy Lives
Get in shape without overhauling your schedule. With just 3 focused hours per week, you’ll burn fat, build strength, and start feeling better fast. All in a private, distraction-free setting tailored to your goals.
1-on-1 Coaching & Real Accountability
You’re not doing this alone. Your coach keeps you focused, checks in weekly, and helps you stay consistent even when motivation dips.
Simple Nutrition Guidance That Works
No strict diets. No counting calories. Just realistic, personalized advice that fits your lifestyle and supports long-term fat loss.
Trackable Progress & Clear Structure
We measure what matters. You’ll know exactly how your body is changing and what to adjust to keep improving week after week.
Don’t wait for the “perfect moment”. This is it.
Join 400+ others in Amsterdam who started with ONE.
Get matched with a program that fits your goals, including: pricing, location, and coaching support.
