Sleep Score, Resilience and Health Score

WHOOP, Oura and COROS send their own recovery score, and some devices score your sleep. When yours does not, Stride works out its own scores from the sleep, HRV and resting heart rate your devices record. There are three, each from 0 to 100, and higher is better.

Sleep Score#

Sleep Score rates last night's sleep. If your device sends its own sleep score, Stride shows that one instead.

Stride's version is made of four parts:

• Duration (40%): 7 to 9 hours scores best. Much less, or much more, scores lower.
• Stages (20%): about 90 minutes each of deep and REM sleep scores full marks.
• Consistency (20%): going to bed within about 15 minutes of your usual time over the last two weeks.
• Interruptions (20%): time awake during the night, and how many times you woke.

Resilience#

Resilience shows how steady your HRV has been over the last 7 days. It is about consistency, not about how high your HRV is.

HRV that changes little from one day to the next usually means you are coping well with your training and the rest of your life. Large swings often mean something is putting you under strain, such as hard training, poor sleep, illness, travel or stress. So a high Resilience means your HRV has been steady, and a low one means it has been jumping around.

Stride takes your average HRV for each day and measures how much it varies. If it varies by about 7% or less, Resilience is 100. If it varies by 40% or more, it is 0, with everything in between scaled evenly.

Resilience needs HRV on at least 5 of the last 7 days, so it does not appear until your device has recorded HRV on most nights. If you wear more than one device, Stride uses one of them each day, because a ring and a watch measure HRV differently enough to look like variation.

Health Score#

Health Score is Stride's daily recovery rating. It combines:

• your Sleep Score (45%)
• your Resilience (40%)
• your resting heart rate compared with your average for the last two weeks (15%). A resting heart rate at or below your average scores well, and one that has risen 20% or more scores 0.

It needs at least two of the three. If a part is missing, the others make up the score.

Days with a recovery score from your device do not get a Health Score, because that score is shown instead. Recovery History on your dashboard charts whichever of the two a day has.

Where to see them#

• On your dashboard, add a Metric tile set to Sleep Score, Resilience or Health Score. Hover over the label for a short explanation.
• In the iPhone and Android apps, Home shows your recovery for the day, with Resilience and the other parts behind it.

You need a device that records sleep and HRV. See Connecting Your Devices.