Endurance Mindset · The Running Newsletter
👋 I'm Henri — certified running coach, exercise scientist, and runner. I've spent over a decade coaching endurance athletes across the US, Colombia, and Venezuela — from first-time 5K runners to advanced marathoners. Endurance Mindset is the science-based running newsletter built for runners who want to train smarter. Every week: real training science, practical application, and the most relevant news from the running world — no fluff. 🙏 Pray · Love · Run 🏃♂️ 🇻🇪 También en Español 🇻🇪 😉
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There was a time Chicago seemed impossible to me 🌄
You're comparing your day one to someone else's day 500. 🌄 Sat Aug 29 · 🇺🇸 Home•Blog•News•Run With Us•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Saturday August 29 · Week close We're closing the week with something more personal. This week I announced a seven-edition series for a marathon I ran eight years ago. And putting it together reminded me of something I rarely mention: there was a time when that distance...
READ POSTThe problem isn't day one. It's day 19 📋
Almost everyone gets day one right. The problem shows up on day 19. 📋 Fri Aug 28 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Friday August 28 · Short edition Yesterday we covered the first four weeks. Today the question that follows: and then what? Running without a plan works for a month. Then the body adapts, progress stalls, and frustration arrives. Today I'll show you what a properly...
READ POST"I can't even run a 5K yet" 👟
Your heart adapts in weeks. Your tendons take months. That's the whole problem. 👟 Thu Aug 27 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Thursday August 27 · Short edition Yesterday we kicked off the Chicago series and several of you wrote me something along these lines: "Henri, I can't even run a 5K yet — this is way over my head." Relax. Today is for you. If you started recently or you're...
READ POSTChicago: 46 days 🏙️ The series begins (1 of 7)
46 days to Chicago. The 7-edition series starts now. 🏙️ 🏙️ Chicago 2026 · D-46 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Wednesday August 26 · Chicago series · 1 of 7 Yesterday I announced the campaign. Today it starts for real. Over the next seven Wednesday editions we're building the complete preparation for the Chicago Marathon together. The last one lands October 7, four days before the...
READ POSTThe half marathon world record fell in Buenos Aires 🇦🇷 (+ Chicago starts)
56:51 in Buenos Aires. And the Chicago campaign starts now. 🇦🇷 Tue Aug 25 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Tuesday August 25 · Weekly edition Happy start of the week to all my readers, and thank you for the chance and the loyalty. Remember Endurance Mindset runs Tuesday through Saturday. And this weekend had everything — above all in Buenos Aires, where the half marathon world...
READ POST"I show up to every session already tired" 😮💨
Exhaustion isn't the price of improving. It's a signal something needs adjusting. 😮💨 Sat Aug 22 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Saturday August 22 · Week close An athlete wrote to me a few weeks ago: "Henri, I'm doing the sessions, but I show up to each one already tired. And I finish worse than I started." He wasn't talking about a bad day. He was describing a pattern of weeks....
READ POSTThe 10K is not a stretched 5K 🌉
The 10K isn't a stretched 5K. It's a different physiological beast — and it trains differently. 🌉 Fri Aug 21 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Friday August 21 · Short edition Every summer I get the same message: "I've run a decent 5K — now what do I do for the 10K?" And the answer almost nobody wants to hear is that it isn't about running twice as far with the same training. Treat...
READ POSTS to Z: closing the runner's alphabet 🔤
Closing the alphabet. Eight letters that explain why you train the way you train. 🔤 Thu Aug 20 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Thursday August 20 · Short edition We've reached the end of the alphabet. Four parts, twenty-six letters — and today we close with the last eight. It's no coincidence that the final letters include the concepts that generate the most questions from my...
READ POST222 seconds: the record he announced before breaking it 🎯 (+ Josh Kerr)
Josh Kerr announced the record before he broke it. That decision is the part you can use. 🎯 Wed Aug 19 · 🇺🇸 Home•Blog•News•Share•Apply•Plans•Store 🌍 Receiving this in the wrong language? Update preferences in the footer → Español 🇪🇸 👋🏻 Hey Reader! Wednesday August 19 · Short edition Yesterday we talked about choosing your fall race. Today I'm bringing you the other half of that conversation — and it's what I promised you. At the London Diamond League, Josh Kerr ran the mile in 3:42.66 and...
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