Episode 47:  Your body knows: The physiology behind why your numbers lie episode artwork

EPISODE · Jun 23, 2026 · 37 MIN

Episode 47: Your body knows: The physiology behind why your numbers lie

from Dirt Nap Diaries · host Brittany Olson

Your watch doesn't know you. It doesn't know you had a rough night of sleep, that you're in your luteal phase, that you've been stressed all week, or that you're climbing in 90-degree heat. It just spits out a number. And yet somehow, that number has the power to make or break a run.In this episode, I'm going deeper on one of my favorite coaching topics: why your body doesn't know your pace, but it absolutely knows your effort. We've talked about RPE before, but this time I'm getting under the hood on the actual physiology, what's happening in your body when conditions stack up and your pace drops, and why that's not a bad run. That's just your body doing its job.What heat, humidity, sleep, stress, terrain, altitude, hormones, and fueling actually do to your pace (and why none of it means you're falling apart)Why chasing pace in your training blocks is quietly undermining your fitnessHow VO2 max, lactate threshold, and endurance blocks each connect back to effort-based trainingWhat to do with all of this information when you're standing at the trailhead about to lace upEffort is the stimulus. Pace is the result. You control one of those. Let's talk about which one.Links & Resources for This EpisodeEpisode 4: Your watch is lying to you: Ditch the data (RPE vs HR)Episode 19: Your Watch Is Being Dramatic: A Trail Runner’s Guide to ChillEpisode 31: Effort Over Pace: Their Effort is Not Your EffortFollow me on InstagramVisit my website: www.sunrisetrailscoaching.comWant to work together? Learn about 1:1 CoachingFree guide: What’s In My Pack? Download here

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Your watch doesn't know you. It doesn't know you had a rough night of sleep, that you're in your luteal phase, that you've been stressed all week, or that you're climbing in 90-degree heat. It just spits out a number. And yet somehow, that number has the power to make or break a run. In this episode, I'm going deeper on one of my favorite coaching topics: why your body doesn't know your pace, but it absolutely knows your effort. We've talked about RPE before, but this time I'm getting under t...

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Episode 47: Your body knows: The physiology behind why your numbers lie

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