For example: You went to bed at 23:00 and fell asleep at 23:30. You woke up at 00:00 and
fell asleep again at 01:00. At 06:00 you were ultimately awake and got out of bed at 06:15.
You only enter the time you spent awake at night into the field "For how long was your sleep
interrupted" Thus the period between 00:00 and 01:00, thus one hour. The other times are
already registered when adding other sleep data.
If you're using a fitness tracker for registering your time spent awake at night, please be
aware that those tracker measure "waking time" differently. Please enter the times you are
consciously are of into the corresponding field. Fitnesstracker also registers the time you
were awake but not aware of it which can lead to a distortion of your data.