Notes on training, design, privacy, and building a fitness app solo.https://kinoku.app/en-ushttps://kinoku.app/blog/hello-kinoku/https://kinoku.app/blog/hello-kinoku/Most fitness apps treat your body as a data product. I wanted one that didn't. Here is the story of Kinoku.Wed, 08 Apr 2026 00:00:00 GMThttps://kinoku.app/blog/hrv-without-whoop/https://kinoku.app/blog/hrv-without-whoop/HRV is one of the most useful recovery signals your body gives you. You do not need a paid band to read it. Here is a private setup on Android.Wed, 08 Apr 2026 00:00:00 GMThttps://kinoku.app/blog/periodization-plain-english/https://kinoku.app/blog/periodization-plain-english/Macro, meso, micro: the three training cycles that make you stronger, explained with no spreadsheets.Tue, 07 Apr 2026 00:00:00 GMThttps://kinoku.app/blog/training-calendar-done-right/https://kinoku.app/blog/training-calendar-done-right/Stop using your training calendar as a to-do list. Use it as a feedback loop between your plan and your reality.Mon, 06 Apr 2026 00:00:00 GMThttps://kinoku.app/blog/polarized-training-explained/https://kinoku.app/blog/polarized-training-explained/Why most runners run their easy days too hard, and the simple 80/20 fix backed by research.Sun, 05 Apr 2026 00:00:00 GMT