what the watch can't measure – between gravity and motion
what the watch can't measure
23 Jul, 2026
My watch doesn’t know if I’m tired.<br>It measures pace, heart rate, distance.<br>Slowly, without noticing, I started trusting those numbers more than my own body.
Before I had a GPS watch, I judged a run by the ache still in my legs after, by trying to slow my breathing enough to bring my<br>heart rate down,<br>by a guess at the distance, and the real number came from a course I already knew.<br>Now the watch shows everything in real time, and even though there’s a whole scale built to push runners toward judging effort by feel instead of by numbers, I still believe the watch first.
The watch doesn’t compare my run to some ideal, it just tells me what happened.<br>My own sense of pace can trick me, making a session feel better or worse than it actually was.<br>But the watch only solves part of the problem too.<br>It can tell me my heart rate hit 167 bpm, that’s a fact, but not whether it came from heat, a bad night’s sleep, poor recovery, or a GPS glitch.<br>The number is objective.<br>What it means is still on me.<br>I don’t think the answer is to distrust the watch, since it shows me things I’d miss on my own, but it doesn’t replace judgment either.<br>Murakami has a line about marathoners leaning on small phrases to get through the distance: pain is inevitable, suffering is optional.<br>The watch can confirm the pain, a climbing heart rate, a slipping pace, but it says nothing about whether that turns into suffering.<br>It just moves where the choosing happens.
None of this is new.<br>Before mechanical clocks, people organized their day around sunrise, the seasons, or what they managed to get done, not a number ticking away the hours.<br>The clock did to the whole day what a GPS watch now does to a single run, it swapped a lived experience for something external and measurable.<br>Oliver Burkeman argues this gave us more than a way to track time, it gave us a new relationship with it, one where time became something to manage, spend well, or fall behind on.<br>Maybe that’s also why a hard run or a good conversation seems to fly by while a boring meeting drags on.<br>The clock marks the same minutes either way.<br>What changes is how absorbed I am in what’s actually happening.
Not every device works the same way.<br>Whoop and Oura rings build their own idea of an ideal, an ideal recovery, night of sleep, effort, and hand me a score for how close I got, even though right looks different for every body.<br>Running data isn’t only personal anymore either.<br>It gets shared and compared, which has real value, but carries the same risk from another direction.<br>At some point the run stops being about the experience and becomes about how it looks afterward, something to prove instead of understand.<br>That isn't the same as chasing a real number for its own sake.<br>2026 year sub two hour marathon and the new mile world record at 3:42 still get me, and probably nudged plenty of people who'd never call themselves runners into thinking a personal best of their own might be possible.<br>The trap isn't ambition, it's forgetting the run is mine before it's anyone else's.<br>When it feels like play again, when the watch is something I use instead of something I answer to, the numbers go back to being a tool, not a scoreboard.
Maybe the answer isn’t a device at all.<br>There’s something to be said for paying attention to the ordinary: morning light breaking apart through a line of trees, the air changing a couple of miles in, shadows sliding across the road while I run straight through them.<br>No sensor logs any of that.<br>A watch can tell me the run happened, not whether I was actually there for it, or whether it was worth it.<br>Trusting these devices blindly means trading human judgment, uncertain<br>and full of tension, but mine, for the illusion of a certainty that doesn’t exist.<br>That doesn’t make the numbers worthless.<br>I still check my pace, still glance at my heart rate mid run.<br>I just try to let my own sense of things have the final say.
I think about why I started running in the first place, long before there was a watch to check.<br>Not to win anything, not to be first at anything.<br>Just a kid finding out how far the next street went, how much bigger the world got with every block.<br>Maybe that’s still the point now.<br>The watch can tell me my pace, my heart rate, the distance.<br>It can't tell me why I come back out tomorrow, that I'm not racing anyone, that I'm still going at my own pace.<br>In the end, what matters most isn’t what the watch says about my body, but being able to feel good, even without it, about what I’ve actually built.