Sustainable Weight loss for Busy Professionals

Take charge of your health. Even with a full agenda.

Visible fat loss in 10 weeks

24/7 online nutrition support

Build around your busy agenda

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Coaching That Fits Your Life - Request a Free Intake

At ONE Human Performance Institute, you get a personal training program tailored to your goals. You can start working with one of our personal trainers starting from €66,75 per week.

Fill in your details, answer 4 short questions, and we’ll contact you within 1 business day.

What our members say about us

Antonella

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

Ayoub

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

Alexis

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

Sandra

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

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

Katie

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

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What’s Included in the 10-Week Bye Bye Belly Plan?

Just 3 Hours Per Week - Built for Busy Lives
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
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.

24/7 Nutrition & Accountability Support
24/7 Nutrition & Accountability Support

Stay supported beyond your sessions. Our team is available around the clock to answer questions, keep you on track, and help you stay consistent. No matter how busy life gets.

Trackable Progress & Clear Structure
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.

Request your Free Intake in 3 easy steps:

Step 1

Click on the button below, fill in your details and click on ‘Send’

Step 2

We will contact you within 1 working day to invite you for a personal introduction.

Step 3

Come and experience ONE Human Performance Institute on an agreed day and time and discover whether you can feel at home.

Request Free Intake
Don’t wait for the “perfect moment”. This is it.

Don’t wait for the “perfect moment”. This is it.

Join 400+ other professionals in Amsterdam who started with ONE.

Frequently asked questions about the 10-week Bye Bye Belly Plan

Absolutely. This plan is built for real people, not fitness pros. Whether you're starting from scratch or returning after a break, we coach at your level and help you build momentum step by step.
Just 3 hours per week. That’s it. We focus on quality over quantity with short, powerful sessions that fit your schedule.
Most people experience measurable fat loss, more energy, and better confidence, both in and out of the gym. Expect sustainable progress, not crash results.
Nope. No extreme diets or unrealistic restrictions. You’ll receive simple nutrition guidance that fits your lifestyle and helps you build better habits that actually stick.
Yes, we always begin with a free intake. Depending on the campaign, a trial period may also be available. You don’t have to decide everything right now. Just take the first step.
Just fill in the short form on this page. We’ll contact you within 1 business day with everything you need to start. No pressure, no guesswork.

Receive all rates and (start) information without obligation now.