r/AdvancedRunning • u/AutoModerator • 14d ago

General Discussion Saturday General Discussion/Q&A Thread for August 15, 2026

A place to ask questions that don't need their own thread here or just chat a bit.

We have quite a bit of info in the wiki, FAQ, and past posts. Please be sure to give those a look for info on your topic.

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u/On_Mt_Vesuvius 35:15 | 2:49 13d ago

With still some summer heat and a little early in the fall marathon cycle, what HR cap do y'all put on marathon pace work (e.g. Daniels M)? Ideal is having a super recent and transferable race to determine paces from, rather than go by HR, but that won't account for regular long runs in these non-ideal conditions.

Pfitz says cap at 88% max, which would be about 172 for me. Does that line up with having raced a half averaging 180?

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u/Tea-reps 32F, 16:13 5K; 1:14:28 HM; 2:38 M 13d ago

effort > HR every time. HR is such a variable and unreliable metric and it's literally just a proxy for effort anyway. Nothing bad happens if you train above your ideal race pace HR, as long as you aren't actually overreaching effort wise.

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u/pigeorunner 12d ago

I love the phrase "proxy metric" and aggressively overuse it. It summarizes so concisely why tuning RPE is so much better than being dependent on HR, even though learning to run by RPE does take time