https://mkostov.com/articles/ Everything I publish in one place: engineering case studies on Medium, and the AI, engineering, and running posts written on this site. en Wed, 05 Aug 2026 00:00:00 GMT https://mkostov.com/articles/ai-garmin-stop-bouncing-vertical-ratio/ https://mkostov.com/articles/ai-garmin-stop-bouncing-vertical-ratio/ Wed, 05 Aug 2026 00:00:00 GMT I gave AI my Garmin data and tried its advice. Stop bouncing. Vertical ratio dropped 10.6% overnight. Then a pace-adjusted archive check gave the honest version.