The run is over and I am on a corner with my hands on my knees, and before my breath is back I am making an editorial decision. The watch has already turned the last 40 minutes into a map, a pace curve, a heart-rate trace, and a position on a leaderboard for the hill I have just come up. Strava is waiting to be told who gets to see it.
The feed is why anyone goes out on a wet Tuesday
The obvious reading is that this is the good part, and it deserves more credit than it usually gets from people like me. The social layer is why a lot of running happens at all. Someone will see it, someone will tap the little thumb, and that thin thread of public accountability gets more people out the door more often than any theory of periodisation ever has. Kudos is cheap and it is kind and it works on me. I have gone out on a bad evening mostly because I did not want a hole in the week to be visible to anyone looking, and a tool that makes me do the thing is not to be sneered at.
The switch that gives it away
What changed my mind about the feed is not an argument. It is a switch inside the app. You can save a run so that only you can see it, and you can stop the map from drawing a line to your front door.
Those controls are not a bug fix and they are not there for modesty. They exist because being watched does something to the activity, and the people who built the audience understood that well enough to ship a way out of it. The switch is the company’s own quiet admission that a public run and a private run are not the same run.
What an audience does to a session
The moment a run has viewers it picks up a second job. It is training, and it is also a small piece of published work, and those two jobs want different things out of the same 40 minutes. Training wants an easy day to be genuinely easy, which on a screen looks like nothing at all. Training wants the session that fits the fatigue you actually turned up with. The published version wants the segment, the round number, the negative split, the route that draws a shape worth looking at.
I am not going to pretend there is a study behind this. I have not found one, and inventing a number for a thing I noticed about myself would be exactly the sort of evidence the argument does not need. What I can say is that the effect is legible from the inside, and it shows up most clearly in the gap between a run I saved and a run I did not.
The half nobody is receiving
There is a separate complaint about these apps, that they measure a run down to the metre and act on none of it, and I have made that argument at length elsewhere. Here it matters only for what it leaves room for. If the loop between today’s run and tomorrow’s session were ever closed, the run would have a private job to do and something at the other end would be receiving it, and the audience would stop being the only thing the effort was for.
There is at least one place the individualised version has been measured, though not on runners. When exercise intensity was set to each person’s own physiological markers rather than a fixed share of maximum, 67% of the individualised group no longer met the criteria for metabolic syndrome after 12 weeks, against 17% of the standardised group. (Weatherwax and colleagues 2018) That is a small feasibility study in a clinical population, and the pooled picture is more sober: across eight studies, training guided by daily recovery data was not significantly better than a good predefined plan, with only some trends in its favour. (Granero-Gallegos and colleagues 2020) That would not necessarily make you dramatically faster than a good fixed plan, but it would fit the training to you, which is the thing an archive can never do.
Kudos is not coaching. They have been quietly conflated, so that encouragement arriving in volume feels like it must be doing the work instruction would do, and the difference only becomes obvious when you notice that one of them changes tomorrow and the other one cannot.
The run nobody sees
So a private run is not a small act of shyness. It is the only condition under which the run is one thing. Nothing about it is being composed, and the easy day is allowed to be as slow as it needs to be, because there is no second audience with a different set of preferences to satisfy. The alternative I keep sketching has no feed in it anywhere, which is less a design position than the only way to keep the effort doing a single job. There is a quiet dignity in a run that nobody sees. It is done for the only person it was ever for, and it asks nothing back except that you show up again tomorrow.
That is also the part no better feed will fix, because a performance and a training session leave the identical trace. Distance, pace, elevation, a line through the streets: the record cannot tell the difference between the run my legs needed and the run that was going to look like something, and neither can anything reading the record. So the app keeps offering its applause to whichever one photographs better, and I keep deciding, on a corner, with my hands on my knees, which run I am going to hand it.