A Wednesday letter for ultrarunners.
Endure Weekly arrives in your inbox every Wednesday at 5 AM Mountain. About a five-minute read. Calculators, gear notes, and the long pieces we keep coming back to. Free Zone 2 Training Guide on signup. Sweet because the miles are sweet. Practical because you're tired.
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The free guide
The Ultimate Zone 2 Training Guide.
A 15-minute editorial read on aerobic-base training — the workout that makes ultrarunners. MAF method, threshold testing, polarized vs pyramidal, why most of us train too hard. Free with your subscription.
- How to find your Zone 2 (the right way)
- A four-week ramp from couch to MAF base
- Threshold testing without a lab
- The mistakes most ultrarunners make at this intensity
- Working pace targets by age, weight, and current fitness
The Ultimate
Zone 2 Training Guide
PDF · 15-min read · Free
Past Issues · Read before you subscribe
Recent letters.
Read the last few issues to see if Endure Weekly is your kind of newsletter. If it is, subscribe above. If it isn't, we totally get it.
- №042 Hardrock training in the off-season — a quiet build for a loud race. May 7, 2026
- №041 Carbon plates in trail shoes — pace gain or marketing? Apr 30, 2026
- №040 Western States lottery math, plus the qualifier we'd actually recommend. Apr 23, 2026
- №039 Two ways to peak — and why most runners pick the wrong one. Apr 16, 2026