Personal training · 24/7 open gym · Haarlem & Alkmaar
Start personal training with a Kickstart or Experience onboarding programme. Meet your coach, build your base and then choose how to continue. Already train independently? Get 24/7 open gym access.
Start personal training with Kickstart or Experience. Already training independently? Get 24/7 open gym access.
2017
EST.
2017
Coaching people in Haarlem since
1,000+
Members helped to a healthier life
3
Gyms in the middle of town
20+
Certified coaches and physios
“I'm not at ease in a classic gym. Here I am.”
Gerben V.
“There's humour, there's calm, and every coach shares what they know.”
Jacqueline C.
“Who'd have thought I'd ever go to the gym. Just go.”
Martine d.E.
“My program keeps adjusting to my results.”
Marianne D.
“Not a treadmill-and-machines gym. I like this much better.”
Remon R.
LD
“Every session looks at what I can do, and at my motivation.”
Lindsay D.
“I'm not at ease in a classic gym. Here I am.”
Gerben V.
“There's humour, there's calm, and every coach shares what they know.”
Jacqueline C.
“Who'd have thought I'd ever go to the gym. Just go.”
Martine d.E.
“My program keeps adjusting to my results.”
Marianne D.
“Not a treadmill-and-machines gym. I like this much better.”
Remon R.
LD
“Every session looks at what I can do, and at my motivation.”
Lindsay D.
Thijs Avezaat
· founder
Why Fundamentals
I started Fundamentals in 2017 with one belief: get the basics right and progress follows. How you move, how strong you are, what you eat, and whether training fits your week.
We coach you on that base. Then we hand you the key, so you can keep going on your own.
Why
Everyone deserves a strong base to build a healthy life on.
How
Personal coaching first, then the freedom to train on your own.
What
Personal training, a 24/7 open gym, small group classes and in-house physio.
Most members combine the two: one session a week with a coach, the rest in the open gym. Good coaching, at a price you can keep paying.
With a coach
Personal training starts with onboarding. Choose Kickstart or Experience to meet your coach, assess your starting point and build a plan around your goal.
€75–110
per hour, package tailored to you
On your own · 24/7
Your own key and login. Train whenever you want, in a gym full of people who take training seriously. For experienced lifters.
€55
per month · Alkmaar €50 · no contract, no sign-up fee
From €49 / month
Circuit training with coach Eva at Haarlem Oost, Monday and Wednesday evening. Your first class is free.
Book a free class
More about group training
At every location
Treatment and training under one roof, so recovery turns into lasting strength.
Meet our physios
Meet our physios
Not sure which fits?
Personal training starts with Kickstart or Experience. Find the start that fits you, then decide what comes next.
Member stories
Member stories
Onboarding
New to training, returning after a break or ready for a better plan? Your personal training starts with Kickstart or Experience. Meet your coach and decide afterwards whether to continue.
01
Apply for your start. A trainer contacts you to discuss your goals and arrange your first session.
02
An intake and physical assessment help your coach understand how you move and what you need.
03
Train with a personal programme and practical nutrition guidance, tailored to your level.
04
Review your progress together and decide whether to continue with coaching, independent training or a mix.
30-second check
Three questions. No email needed.
How much do you train right now?
Most chosen
€149
one-off
3 × 60 min personal training
Intake and physical assessment
Your own training program
Food coaching basics
Afterwards you decide what's next
6 weeks
€297
one-off
6 × personal training + unlimited open gym
Coached and solo training combined
Tailor-made program
Nutrition and lifestyle
6 weeks of 24/7 access
Group classes · Haarlem Oost
€0
first class
Small group circuit with Eva
Monday 19:00
Wednesday 18:00
All levels welcome
From €49/month after
You won't find us on an industrial estate. Every Fundamentals sits in the middle of a city or a neighbourhood, because a gym is a place to meet people. Closer means easier, and easier means you keep showing up. More locations are on the way.
Essenstraat 25
Rockplein 10 · Slachthuis
Laat 47
The coaches
Certified coaches, each with their own specialty. We match you with the one who fits your goal.
Questions
Anything else? Send us a WhatsApp on +31 6 51 877 186.
Three one-hour sessions with a personal trainer. We start with an intake and a physical assessment, then build your training program and cover the basics of food. After the third session we look back together and you decide if and how you continue.
Stronger · Fitter · Fundamentals
Book a Kickstart and we'll get in touch to plan your intake.
Don't be shy.
Just say hi.
© Fundamentals 2017–2026
