My spreadsheet noticed the change before my mirror did

I keep a 12-column log. Weight is column one, but the one I actually check is 'minutes to feel normal after three flights of stairs.' Week 1: 9 minutes, sitting on the landing, pretending to check email. This morning: 2 minutes 40 seconds, and I was irritated my podcast hadn't ended yet. The scale is down 31.4 lb since January, which is fine, but the stair trendline fell harder and earlier. Mildly contrarian take: single weigh-ins and single NSVs are noise. Give me 20+ points and a slope. I’m not saying the medication did all of it — I also stopped treating the elevator as a personality trait. But the spreadsheet caught the change before my mirror or my old pants did. Anyone else track something odd that ended up mattering more than weight?