(Created page with "==睡眠下限== {{see also|Age}} Since vital sleep stages are generally not possible to reduce, the extent of compression required to sustain a schedule increases dramaticall...")
Since vital sleep stages are generally not possible to reduce, the extent of compression required to sustain a schedule increases dramatically as total sleep time reduces. Compressing sleep, however, requires adaptation, and greater levels of compression necessitates harsher and/or longer adaptations. As such, schedules can be classified by their difficulty level, which is mostly a function of the amount of sleep cut.
