My Sleep Analysis Is Showing Negative Durations

Sometimes, the analysis can hiccup during its processing. Try going to the watch app and swiping right on the main screen to the "Settings" page. To the left of the "Sync Again" button where it shows the used sensitivity level and date, tap and hold down your finger until you feel a haptic tap. A switch named "RE" should appear. Tap to turn this switch ON, then tap "Sync Again" and allow Sleep Pulse to re-analyze your sleep. By turning on the "RE" switch, Sleep Pulse will attempt to retrieve the raw motion data again and run an analysis over it, resetting any errors in the analysis.