SAYA - Sleep Analytics

Most sleep trackers show raw data, but leave you guessing why your recovery failed. SAYA bridges this gap for Garmin users through effortless, zero-friction tracking. By automatically analyzing advanced physiological markers like Evening Resting Heart Rate (eRHR) and overnight HRV-Incline, SAYA uncovers hidden recovery debts. Using statistically robust within-subject correlation models, it delivers actionable, high-impact guidance—revealing your ideal dinner timing, optimal training loads, and ideal sleep windows to reliably maximize overnight recovery.