“It’s alright,” I tell the Upright posture trainer, which is attached to the base of my spine. “I’ll do it right this time.”
I’m not looking at the device itself; that would be impossible. Instead, I’m looking at the three smiley-face icons in the thing’s companion app. The green one is lit up now, but I just slipped into yellow for a second before I caught myself, and if it hits the red one — either from me slouching or overextending my back — it will be unpleasant.