Sylvia Keijzer – Keijzer Academy

Sylvia Keijzer is a Performance and Breath Coach in Maresme, passionate about transforming stress into strength. With 26 years of international corporate experience, she now helps busy professionals reduce stress and enhance performance through natural resources like breath, cold exposure, and time in nature. She also supports ultra-trail runners in optimising their performance.

Originally from the Netherlands, Spain is the seventh country Sylvia has called home. Living near the sea and mountains was a long-held dream. She now starts her days with energising choices: a sunrise view from the mountains or the sea. As an ultra-runner and cold-water enthusiast, being immersed in nature fuels her life and work.

Sylvia’s path to this work wasn’t linear. She was “always busy,” equating rest with laziness and constantly pushing through relentless schedules. This was the basis for a successful international career, but also created a lot of tiresome stress. Instead of strengthening her body, health and mind she was weakening it.

Functional breathing was the game-changer. Learning how to let her breath work for her and focusing on nasal breathing brought immediate, powerful shifts in how she felt, slept and performed.

Now, Sylvia shares these tools and all her learnings through her 1:1 programme, Stress Less, delivering masterclasses and talks for teams and companies to perform better. She also organises Wim Hof Method Fundamental Workshops and facilitates online and offline breath work sessions.

I’m a certified Vinyasa and Yin Yoga teacher, NLP Business Coach, Advanced Breath Instructor for Oxygen Advantage and the Wim Hof Method.

I help others tap into their “inner fuel” to enhance outer performance. It’s about shifting from speed to presence, restlessness to peace, and tension to relaxation. And also in that way, you can optimise performance. For me, it’s simple: the sky isn’t the limit—the mind is.
Sylvia Keijzer

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