For leaders who carry a lot

Perform at your best without running on empty

You carry a team, a home and a full calendar, and everyone assumes you’ll manage. You usually do. But your head is rarely quiet and you wake up tired. I help leaders sleep again, think clearly and stay steady under pressure, with breath, movement and time outdoors.

Steadiness isn’t a personality trait. It can be trained.

Sound familiar?

The pressure isn’t going away. The tension can.

You know what's healthy. The deadline wins. It's just a period
Everyone counts on you. Few ask how you are.
You wake up at night and never feel rested.
Your energy isn't what it used to be.
You are always on.

Switching off is a skill

Under pressure your body shifts into high gear: faster breathing, tight shoulders, a head that keeps running.

That helps for a moment.

The trouble is that many leaders never switch off again, not even at night.

Self-regulation is the skill of bringing yourself back to calm and clarity, on purpose and performance, while the pressure is still there.

I teach it with breathing, movement and time outside. Practical and backed by research.

Measured
We measure at the start and at the end, so you see the change for yourself.
Built for a real calendar
Short practices for before a hard meeting, in the middle of one, and after it.
Adjusted to you
Age, sleep, training load and hormones all shape how you handle stress. For women that includes the changes after 40, which I'm specifically trained in.

Why outdoors

The trail teaches what a meeting room can’t. On uneven ground you have to watch where you put your feet. Your breathing finds the rhythm of the climb, and your head goes quiet.

Research backs this up. After an hour’s walk in a forest, activity in the brain’s stress centre goes down; after the same walk along a busy street, it doesn’t. And 20 to 30 minutes in nature is enough to lower the stress hormone cortisol.

That’s why time outside is part of how I work: short practices outdoors wherever you live, the Personal Reset near Barcelona, and from 2027 the Steady Leadership Journey in the Pyrenees.

Where to start

START HERE · ONLINE

Booster Breathing Session

In two hours you see how you breathe now and what to change, and you leave with a personal protocol you can use the same day. If you continue into the 90-day programme, the session is deducted from the price.

€299,-

ex. 21% VAT

PROGRAMME · ONLINE

Stress Less in 90

The Booster session shows you what to change. This programme makes sure it still works three months later, when the pressure is back.

We start with your baseline measurement, followed by seven private sessions, practices for daily life and support in between. At the end we measure again.

€1.950,-

ex. 21% VAT

OUTDOORS

Personal Reset

A few days between the sea and the hills. Walks, breathing, cold water and honest conversation, at your pace. You go home with a clear plan that’s yours.

€995,-

ex. 21% VAT, travel, stay, food

OUTDOORS (ES)

Steady Leadership Journey

6 months · max 6 leaders · 2028: €4.500

Three months online to prepare. Four days and three nights on the trail in the Pyrenees: walking, breathing and honest conversations, in terrain that asks for your full attention. Online follow up to make it stick at work. All inclusive from the start in Barcelona; your travel to Barcelona is not included.

€3.250,-

ex. 21% VAT · founding price

For companies and teams

I speak at company events and for leadership teams. I run masterclasses and workshops on performing under pressure. Every session includes practice and a live stress measurement, so people feel the difference, not just hear about it.

I work in English, Spanish, Italian and Dutch. Organisations I’ve worked with include Bayer, Novartis, Ørsted, US Health Connect and Oxygen Advantage.

I teach what I once needed most

For 26 years I worked in strategic marketing and project management in international pharma, in six countries, up to director level. I was always on. It put me in intensive care.

Breathing, movement and the mountains gave me back control. Today I’m a breath coach and ultra trail runner, and I’m training as a wilderness guide. I teach what I once needed most myself.

People tell me my strength is calm. I create a safe place, and then I give you the push to take your next step.

Why work with me

I won’t ask you to push harder. You left your comfort zone years ago. What you haven’t practised is coming back down.
I’ve had your job. I know the reorganisations, the calls across time zones, and what it costs to be the one who always delivers.
The body was my subject before it became my work. A degree in sport and nutrition science, a postgraduate qualification in how stress affects the immune and nervous systems, and instructor training in several breathing methods and approaches.
I’ve started over many times. Six countries and a new working culture each time. We can work in English, Spanish, Italian or Dutch.

In their words

“I came in with chronic stress, short sleep, and a head full of noise. After one session with Sylvia, I slept through the night for the first time in months. … I now use these breathing tools daily, even before big meetings.”
Ton, executive leader

“…ensuring that we felt safe at every part of the process and at the same time challenging us to trust ourselves and commit.”
Doris, workshop participant

“They call it retreat, which sounds like detaching from the real world for a while. But I’ve never experienced anything that brought me back to myself and my real life as much as my three days with Sylvia.”
Francesca, VP

      
   Keijzer Academy
   37 Google reviews 
  
 
 
   
 
 
       Posted on Google  
   
   Renée Meyer 
 
 
 
 Trustindex verifies that the original source of the review is Google. Following our 2-hour session, I am quite  pleased with the apparent results of my new breathing practices.  I have been sleeping much better, and sometimes, I am not too thirsty when I wake up.  I try to remember to do the exercises, but I have alot of well-being "treatments" to fit into daily routines.
  
 
      Posted on Google  
   
   Aline Noizet 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing experience with Sylvia. Very valuable for every woman. It was eye opener for me. Get in touch you won’t regret it!
  
 
      Posted on Google  
   
   samantha ho 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing experience! Sylvia is so kind and knowledgeable. I really learnt a lot from her, and about myself. I was nervous about the ice bath but she was so helpful and guided me the whole time. Thank you!
  
 
      Posted on Google  
   
   Stephanie Rinkel 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had an individual retreat with Sylvia for 4 days. A wonderful experience on personal reflection. Sylvia guides you with questions to your core worries, offers tools that help you face your current concerns, insecurities, while putting an emphasis on your mental health (reducing stress, anxiety, etc.) Yoga, hiking, ice-bathing and watching the sun rise, everything was incorporated. Excellent.
  
 
      Posted on Google  
   
   Simonetta Roma 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had wanted to experience an ice bath for a long time, and being able to do it with Sylvia was a wonderful opportunity. She accompanies you with empathy and charisma, making you feel supported at every step. This is not just about jumping into cold water, it’s about learning how to face your fears, manage your breathing, and reconnect with the inner power you already have. I highly recommend the experience with Sylvia.
  
 
      Posted on Google  
   
   Esther Goergen 
 
 
 
 Trustindex verifies that the original source of the review is Google. Sylvia has created a beautiful setting in her home in which she shares the basics of the Wim Hof Method. Alongside a warm welcome with homemade banana bread and other healthy treats, she creates a space where you feel safe, heard, and supported. Within just three hours, you gain a clear understanding of the core Wim Hof techniques. A wonderful location and highly professional guidance ;  I would wholeheartedly recommend it to anyone.
  
 
      Posted on Google  
   
   Alexa 
 
 
 
 Trustindex verifies that the original source of the review is Google. My 4-day time-out with Sylvia was fantastic.

Not only the yoga session where only one session brought significant improvement in my body, but also the wonderful hike and the exchanges on its way, the meditation at the beach at sunrise, followed by a swim in the sea and the breathing session were so beneficial.

I can highly recommend Sylvia’s Reset-Program to all that need a reset or time-out, time for yourself to reflect and exchanges with someone that ask the right questions that bring you closer to you and your wishes and visions.

In Sylvia’s Reset Program you’ll have everything, from yoga-lesson, to breathing session, meditation on the beach at sunrise, wonderful hike in the hills, coaching and very empowering and motivating exchanges.

I appreciate Sylvia’s positiv attitude, her warm welcome, the reflective, inspiring, and motivating exchanges. Not to forget the follow-up calls, after returning home, to see where you stand, what worked, what not yet and why, which were so helpful.
  
 
      Posted on Google  
   
   Jane Mitchell 
 
 
 
 Trustindex verifies that the original source of the review is Google. Taking an ice bath workshop with Sylvia was so empowering. The breath and mind preparation was perfect. She guided us in such a way that I felt calm, safe and informed throughout the whole experience. I could not have done it without you Sylvia!
  
 
      Posted on Google  
   
   Info 4Voices 
 
 
 
 Trustindex verifies that the original source of the review is Google. An invigorating experience from start to finish. Sylvia is the ultimate professional and held our hands (figuratively and literally) throughout the process - from the breathing techniques to the ice bath itself. I so recommend it!!
  
 
      Posted on Google  
   
   Mireia Ibáñez Cid 
 
 
 
 Trustindex verifies that the original source of the review is Google. My parter and I attended Sylvia's WHM workshop and it was amazing. Sylvia was lovely and very attentive of us, ensuring that we felt safe at every part of the process and at the same time challenging us to trust ourselves and commit to the activity. We both highly recommend this experience - and that you do it with Sylvia!