You can wear the Apple Watch while you sleep using the Vitals game.

The Vitals app on watchOS 11
Apple Watch users can benefit from Vitals in watchOS 11 according to Apple’s VP of Health, but the app is only useful while you sleep. Apple has been offering limited sleep tracking on the Apple Watch as part of its overall health-and-wellbeing offering for several years. In watchOS 11, however, a new feature will require users wear the Apple Watch while they sleep to get a more accurate reading of their health. Apple VP of Health, Dr. Sumbul Dasai, explained in an interview with CNET how the Vitals app would provide a daily summary of a user’s health as collected by the Apple Watch. This information will include sleep data, heart rates, respiratory rates, blood oxygen levels, and skin temperatures at rest while the user is sleeping. The app will alert you if the Apple Watch detects multiple vital data points that are out of sync with the user’s norm. Sleep is required as stress and movement during the day can affect the measurements. It can only measure the “basal state” when the user is resting. Desai said that “so much of your health is hidden.” This daily health status is like a snapshot of how you feel overnight. Desai says the average Apple Watch wearer will need to change their behavior and sleep with the device. She insists that you must sleep with your Apple Watch to make it work for you. The snapshot will not necessarily give a user a score or distinct values, but rather how their state compares with a baseline. “We compare you against you,” Desai proposes. Subscribe to AppleInsider YouTube. The whole point of Vitals, is to show when a person has changed their lifestyle or their body is doing things outside the norm. If someone drank alcohol, they may have a higher heart rate or a lower heart rate. They could also be sick. The app uses data collected by the Heart and Movement Study – an Apple project in collaboration with the American Heart Association and Harvard’s Brigham and Women’s Hospital. The Vitals app is based on data points observed during the study. Desai was insistent that the notifications did not say “You need to see a doctor.” “We are very careful to not make you wait unnecessarily to see a doctor.” “We have thought about it very carefully. When do we want you to be notified, and how do you want to be notified,” she added. “We want to ensure that when we notify you, it’s for an actionable reason and a meaningful one.” Users will be able try out Vitals as part of watchOS 11 which will be released in the fall.