I don't trust scales. I trust the same scale.

I stopped weighing myself years ago because every scale in my life disagreed. The one at home, the one at my sister's, the one in the hotel gym in Rotterdam. One of them said I'd gained three kilos overnight, which is not a thing bodies do.

So when my studio said the scan was the same machine every quarter, using the same protocol, I relaxed. That was the entire pitch, and it worked.

Now the quarterly review is the only measurement in my life I believe, and weirdly it made me less obsessed with the others. When you have one trustworthy number every three months, the daily noise loses its grip.

I've also caught myself using it the way my coach does: looking at direction over two quarters instead of any single visit. One bad day doesn't become a bad week.

The other thing a consistent measurement gives you is the ability to argue. My waist number looked wrong in June and it turned out the posture during the scan was different from March. We could only see that because nothing else about the method had changed.

Boring methodology turns out to be the feature. It's the only reason the trend line means anything.

MOJOWAY keeps the measurement protocol fixed across quarters, which is what makes a client's year comparable to itself.