Sleep enough, and at the same time every night.
Your nervous system does most of its recovery overnight, and that's when your wearable reads HRV. Short or irregular sleep keeps your body in "alert" mode, and your morning number shows it.
Aim for 7–9 hours, and protect the schedule as much as the total. Going to bed and waking up within the same 30-minute window, weekends included, gives your body a rhythm to recover against.
- Keep the room cool, dark and quiet
- Screens off an hour before bed
- Same wake-up time, even after a late night

