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Build your resilience for the long term.

Understand your body. I translate the latest research and the physiology of breathing and cold exposure into safe practices tailored specifically to your health. 

Photo by Patrick Reymann - Momentesammler.pro
Bas Metsemakers, Wim Hof Instructor
Why icenurse

Expert nursing care meets the power of nature

Cold training is powerful, but it must be done safely. I combine the proven Wim Hof Method with my clinical expertise. With me, you won’t learn stunts—you’ll learn scientifically proven tools for your health.

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Science, Not Hype

I'll explain the physiological processes to you. We use cold and breathing in a targeted way to reduce inflammation and relieve stress.
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Maximum security

As an expert in emergency medicine, I understand the body’s limits. You’ll train in a safe environment—secure, supervised, and without pressure to perform.
Workshops & Training

Experience the Power of Cold, Mindset & Breathing

Whether it’s a one-day workshop in Villmergen or Zurich, a multi-day retreat in Europe, or a corporate event: find the format that’s right for you. Professionally guided with medical expertise—safe and without pressure to perform.

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Wim Hof Fundamentals Workshops

The perfect introduction. Get a solid grasp of the three pillars (breathing, cold, focus). We combine theory and practice to boost your energy and reduce stress. No prior experience required.
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Retreats & Travel

A break for your health. Multi-day events at powerful locations across Europe. Deepen your practice, find peace, and fully recharge your batteries in nature.
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Team Events & Companies

Build your team's resilience. Professional workshops on stress management. No empty platitudes—just practical tools for a healthy workday.
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Community Events

The Swiss Cold Water Society

Cold brings people together. In addition to the workshops, we organize regular “Community Dips.” These are open gatherings for everyone—whether you’re an experienced cold-water swimmer or a curious beginner. We get into the water together, motivate one another, and enjoy nature. It’s not about performance or training, but about the shared experience, connecting with others, and having fun.

Bas Metsemakers

Wim Hof Method Advanced Instructor

Swiss Cold Water Society

Bas & Mirjam - Founders & Organizers
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Wim Hof Workshop

Safety is our top priority at IceNurse. As a medical professional, I pay close attention to contraindications such as heart problems or high blood pressure. Before each workshop, we assess your health status so you can enjoy the benefits of cold therapy without any risk.

Yes. Scientific studies show that controlled breathing exercises and exposure to cold can reduce inflammation in the body and help regulate the nervous system. You’ll learn practical techniques to help you stay calmer in your daily life and actively build your resilience.

No, absolutely not. My workshops are designed for both beginners and advanced students. We approach the cold step by step—without any pressure or expectation to perform. You’ll learn the technique from the ground up so you can safely practice it at home.

SBK Lecture
Workshops Held
0+

In 7 different countries

Enthusiastic participants
808080+

Successfully "thawed" ice cream

About Bas Metsemakers

"IceNurse" – Combining medicine and nature.

I come from a practical background, not a theoretical one. As a longtime nursing director in cardiology, oncology, and emergency medicine, I know exactly how our bodies react to stress. For me, the Wim Hof Method isn’t just an internet trend, but a physiologically sound tool for maintaining good health. I combine my clinical expertise with the power of nature to show you a safe path to more energy—without any esotericism, but with a lot of heart and medical insight.

Contact & Consultation

Do you have any questions or concerns?

Trust is especially important when it comes to health issues or pre-existing conditions. Are you unsure whether a workshop is right for you, or are you worried about the cold? That’s completely normal. Just send me your questions. As a medical expert, I’ll give you an honest assessment—no strings attached and straight to the point.

125 Dorfstrasse, 5637 Geltwil

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