Free 15 min call | Mettle

Services
Running coaching Mental training Run your best race
Speaking
Events
Blog
About
Mettle Dr Kaz Williams
Contact

Mettle

Services
Running coaching Mental training Run your best race
Speaking
Events
Blog
About
Mettle Dr Kaz Williams
Contact

Based in Chamonix, FRANCE…and wherever you are!
+33 (0)6 74 55 85 55 | hello@mettlerunning.com

Services
Speaking
Events
Blog
About
- Mettle
- Dr Kaz Williams
Contact

Home
Blog

Free 15 min call

JOIN US

tag yours #runwithmettle

Martha wanted a sub 4 road marathon at Streewald,

Martha wanted a sub 4 road marathon at Streewald, and she ran a strong 3:48!

On a course that was more trails, bridges and steps, than road, Martha smashed her goal.

The best part?

She’s already thinking about what time is possible on a true road marathon! This finish…is a launchpad 🚀

Incredible work Martha!

Love and Mettle,
Kaz 👊

@marthapierce

#runwithmettle #marathon #trailrunning #sub4 #running

This is what a well-executed race looks like. Cof

This is what a well-executed race looks like.

Coffee in a gorgeous race mug (lush race swag Traprock!) and post-run bliss with Hoka’s Recovery Slides for some foot TLC.

Janet finished Traprock 50K at the weekend. Three loops over technical terrain, and she stayed strong and steady all the way through.

In the past, Janet has had fueling issues, which we’ve been working on. Saturday she nailed it!

Consistent energy, dialled hydration and electrolytes on point, which is all great practice for the bigger races she has ahead.

Way to go Janet! 🔥

Love and Mettle,
Kaz 👊

PS Still guessing your race-day nutrition? Let’s fix that at Eat Sleep Think, Chamonix. Link in bio ⬆️

#runwithmettle #trailrunning #ultrarunning #eatsleepthink
@janetrsanderson @hoka

This is what running with intention looks like. No

This is what running with intention looks like. Not suffering. Joy.

Yes, there are mountain highs and valley lows, but it’s knowing what to do when you’re feeling nauseous, fatigued, and doubt has set in.

Joy doesn't happen by accident. It happens when you have a nutrition strategy, your sleep has been dialled in, and your mind knows how to stay present when things get hard.

That's exactly what Eat Sleep Think is about.

Saturday 23 May | Hôtel Les Aiglons, Chamonix | 08:45–13:00

Three experts. One morning. Everything you need to run your next race smarter.

Fuelling: Rebecca Dent, High Performance Dietician
Sleep: Dr Charlotte Edelsten, Performance Sleep Specialist
And on drums 🥁 Mental game: me, Dr Kaz Williams, Performance Psychologist

€30 Limited spots. Link in bio.

Love and Mettle,
Kaz

#eatsleepthink #trailrunning #ultrarunning #chamonix #runwithmettle #mountainrunning

It’s -25°C and the snow conditions are fantastic!

It’s -25°C and the snow conditions are fantastic! ❄️
- Jean-François

This message made my day! Jean-François trained hard to be strong for an epic backcountry trip to Japan. We focused on endurance and aerobic capacity, basically building the engine to go further and longer 💪

At Mettle, we help athletes prepare, build resilience, and confidence to take on their personal challenges, on trails, slopes, or in life.

Love and Mettle,
Kaz 👊

PS Can’t you hear the excitement in Jean-François’s message?! ✨

@jeanfrancoiscoquoz

Photos: @livsansoz

#japow #hokaido #mountains #mettle #believe

Become a Mettle insider

Get the latest trail and ultra running advice and training directly in your inbox!

© 2026 METTLE. Born by the sea. Made in the mountains.

Based in Chamonix, France and wherever you are in the world.
+33 (0)6 74 55 85 55 | hello@mettlerunning.com

Privacy Policy Terms and Conditions

Website powered by 100% renewable energy!