The Sleep page in-app provides a summary of your previous night’s sleep.
Highlighted: Your Sleep Performance score, which is the Hours of Sleep (achieved) compared to the amount of Sleep Needed. (refer to below screenshot)
Reporting and Statistics
Sleep Performance is reported on a 0-100% scale, with 100% indicating that you achieved all the sleep you needed for the night. This page also provides statistics, such as: Time in Bed, Disturbances, and Latency - relative to the average calculated from the last 30 days.
You can access more detailed statistics by tapping Hours of Sleep. From here, you will see your heart rate data for the entire time in bed, along with the below statistics detail:
Disturbances - the number of times you wake up through the night. These are not usually conscious awake times, but instead typically reflect times when you shifted in your sleep or came briefly out of a light phase of sleep.
Efficiency - How long you were asleep relative to how long you were in bed. This period begins from the time you fell asleep to the time you officially woke up. For example, if you went to bed at 10:15 pm and woke up at 7:40 am, then the time you spent in bed would be 9:25 hours. However, the amount detected at this time was only 7:25 hours. If this is the case, the Sleep Efficiency would be about 80%.
Respiratory Rate - The average number of breaths a minute throughout the entire Sleep.
Sleep Stages - shows the Sleep Staging for the selected night. There are 4 main Sleep Stages: Awake, Light, REM, and SWS (Deep). By tapping on the designated button next to each Stage, you can view each specific Stage's details (in red) on the Heart Rate graph at the top of the page.
When you tap on Sleep Needed (under Sleep Performance), you will find:
- Total Sleep Need (hours) / divided by:
- Sleep Baseline
- Sleep Need gained from any recent Strain you accumulated
- Sleep Debt based on the previous night's Sleep acquired vs. actual Sleep needed
- Any credit for recent Naps
Sleep Performance is a key component of your Recovery, and dedication to Sleep has been shown to improve athletic performance. WHOOP data demonstrates that both time spent asleep and time spent in Rapid Eye Movement (REM) sleep are positively correlated with performance.
WHOOP uses advanced sleep monitoring technology to accurately capture the true amount of time you are sleeping, and not just the amount of time you spent in bed.
To read more about WHOOP's Sleep algorithm, check out our Locker post: WHOOP Proven as Most Accurate, Non-Invasive Sleep Monitor.
To read about Sleep Staging, check out this Locker Post: How Much Time Should You Spend in Each Stage of Sleep?
To read about Sleep Debt, check out this Locker Post: The Optimal Sleep Playbook: Managing Sleep Debt with WHOOP.