9Mile Marathon Running School
Private
587 members
Free
Avoid the deep-rooted training mistakes traditional coaches told us the past 40 years!
I’m Marlies Kort. In my 30s I ran a 2h47 marathon. In my 40s I became World Champion Ironman 70.3.
Throughout my running career, I’ve found that traditional 12+mile long runs are counterproductive. I developed a smarter training system for age-group runners that focuses on fewer miles - helping to save time, reduce fatigue buildup, and lower risk of injury.
I called it The 9Mile Marathon.
👉 Course Updated 👈 July 6, 2026
My free Skool Members Get 👇
✅ a 1:1 Training Tune-Up Zoom call with me, in person
✅ 9Mile Marathon training course and roadmap
✅ 5k, 10k, half- and full marathon training schedules
✅ a thriving community with more than 500 9Milers from all over the world
I also have a VIP Premium Program. Premium members get👇
💎 fully customized training schedules (event specific, running, strength, nutrition)
💎 my personal help, guidance and accountability
Click the 'Yellow Button' to join for free 🙏.
skool.com/the9milemarathon
Running solid marathons - train FEWER miles. Avoid the deep-rooted training mistakes traditional coaches told us the past 40 years. We teach you how..
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