Silke Werkhoven

Hi, I’m Silke, also known as @fitbysilke. I’m a passionate runner on a mission to break the 3-hour mark in the marathon. When I’m not logging miles on the road, you’ll find me on the bike, I even founded a cycling group in Friesland to bring people together through movement. Through every high and low, I share my journey authentically to inspire others to move with purpose, grow through challenges, and push beyond their limits.

My disciplines

Running & cycling

Number of hours’ training per week

12h - 15h

"Some people meditate. I run"

My favourite Etixx products

As a dedicated runner, I swear by Nutritional Energy gels. They’re my go-to fuel for those challenging miles. Whether I’m pushing through intervals or chasing a long-run goal, they give me the boost I need to stay strong and keep moving forward.

My greatest sporting achievements

Sub 3 marathon

My personal record

5Km - 19:48
10Km - 42:05
21Km - 1:34:25
42Km 3:58:22

My #GiveItYourAll moment in 2025

Spontaneous marathon – 3 weeks prep – part of sub-3 journey – biggest challenge!

My social media

Instagram: fit_by_silke
TikTok: fitbysilke
Strava: Silke Werkhoven

Discover more ambassadors

Glen Van den Bulcke

Running, (Gravel)cycling, Inline skating

An enthusiastic exercise coach, chocolate-lover, passionate entrepreneur and endurance sportsman with a mission: to help as many people as possible in their search for happiness. I have been an Etixx ambassador for 3 years and I fully integrate their products into my daily routines. In doing so, I have seen a visible improvement in my sporting achievements. I am therefore extremely grateful to Etixx for this.

Robbert Slagers

Running and fitness

Hi. I am Robbert Slagers, I am most happy when I run that gives me so much joy. I did different sports like korfball, hocke and basketball. Until my son's BSO school asked if I wanted to join the kids run of the Eindhoven Marathon. I liked it so much and it was a great experience that I started getting into running. I started training to get my fitness level up, so that I could start achieving my goal of running a longer distance at the Eindhoven Marathon one day.

Fleur Hooyberghs

Athletics - Pole Vault

I am Fleur, 23 years old, pole vaulter and physiotherapy student. I have been on the athletics track since I was 6 years old. At 15, I specialised in pole vaulting. Sport is my hobby and my passion. I am a competitive animal, love to push my physical limits and I am driven to reach my goals. Besides the athletics track, you can also find me among my school books, on the racing bike or in a cosy coffee bar. Etixx products support me to perform optimally during busy training and competition periods and thus further pursue my goals.

Go to the overview with all ambassadors