The watch lies. My lungs don't.

This week I did the nerdy thing I’d been promising to do for ages: I drove my running route in the car and watched the odometer.

The verdict was humbling. My watch has been generous — reading my distances about a third longer than they actually are. The kilometres I’ve been proudly logging were, let’s say, optimistic. My longest run wasn’t quite what the screen claimed. My totals came down. And I’ll be honest — it knocked my confidence for a day or two. There’s a particular sting in finding out the numbers you were proud of were partly a friendly fiction.

Then today the watch tried it again. It told me I’d spent a third of my easy run in the “anaerobic” zone — breathing hard, working near my limit. Which would be alarming, except for one small detail: I was chatting the entire way. Full sentences. Easy breath. You cannot hold a conversation and be gasping at your anaerobic threshold at the same time. The two things don’t coexist.

So the watch lies about distance. And, it turns out, it lies about heart rate too.

But here’s what I keep coming back to, and it’s the lesson I want to actually keep from all of this: there has always been one instrument on every single run that has never lied to me once. My own breath.

The watch can inflate my distance and panic about my heart rate all it wants. My lungs know the truth. When I can talk, I’m easy. When I can’t, I’m not. That gauge has been strapped to me my whole life, it needs no charging, no GPS, no calibration, and it has never once been wrong. I just spent two months trusting a gadget over it.

The distances were shorter than I thought. Fine. But every run still happened. Every minute on my feet was real. My legs are genuinely stronger than they were two months ago — I feel that on the same roads that used to take more out of me. The work was never fictional. Only the ruler was.

So I’m keeping the watch, generous fibs and all — it’s a consistent enough liar to still show me trends, and a better one will come in time. But I’m demoting it. From now on it reports to my lungs, not the other way around.

Talk test passed. Easy run. That’s the only number that was ever true.