Getting your Stability from overnight data

If you have a Visible Band 2.0, your Stability Score uses data collected while you sleep.

Your band measures your resting heart rate and heart rate variability overnight. Your Stability Score then combines this data with your morning sleep score and, optionally, any symptoms you rated in your Evening Check-in.

Wear your band to bed to get your Stability Score from data collected while you sleep.

Here's how it works:

We recommend having at least 15% battery charge on your band before going to sleep.

Stability needs a baseline of overnight resting heart rate and heart rate variability data before it can calculate a score. It takes 4 nights of wearing your band to bed before you'll get a score.

While your baseline is building, you'll see a Building your baseline card on your Stability result page.

Stability needs overnight data to calculate your score. If your band doesn't record enough data while you sleep, you'll see a "Stability Score unavailable" message instead.

This can happen if:

To help avoid this happening again, make sure your band has at least 15% charge before you go to sleep, and that you're wearing it snugly on your wrist or arm while you sleep.

You can't take a morning reading as a backup on days when your overnight data is unavailable.

Overnight data is the most reliable option for getting your Stability Score with Visible Band 2.0. However, if you prefer not to sleep wearing your band, you can choose to use morning readings for your Stability Score instead.

Visible uses your body’s signals over time to understand what’s normal for you. To keep your score as accurate as possible, it needs to compare either morning data across multiple days, or overnight data across multiple days.

If you're only able to wear your band on certain nights, or think you may often forget to wear it, we recommend using morning readings to get your Stability Score.

To switch to morning readings:

Then put your band on when you wake for the day, and take a short morning reading to get your Stability Score.

You can switch back to overnight data at any time later in Profile → Stability.

Any time you switch between overnight data and morning readings, you may need to build a new baseline. For example, if you switch to overnight data and haven't worn your band overnight in the past 90 days, you'll need to rebuild your baseline.

If this happens, you'll get a message explaining that you need to rebuild your baseline.

The Stability algorithm handles the switch between overnight and morning measurements, so you can keep comparing your scores over time, no matter how you choose to take your body's data.

Your morning data may look different from your overnight data. This is normal.

Overnight and morning data are shown separately across the app, for example, on the Trends page and in the Health Report PDF.

Your resting heart rate (HR) and heart rate variability (HRV) are labeled by when they were measured: Overnight Resting HR and Overnight HRV, or Morning Resting HR and Morning HRV.