How Long Should a Nap Be: Choose Duration by Purpose, Sleep Inertia, and the Next Task
Nap duration should be chosen by purpose, expected time to fall asleep, the chance of post-nap grogginess, and the task that follows waking. Time in bed is not the same as time asleep, so the alarm must account for settling time as well as the wake-up buffer. Brief naps can fit quick alertness goals, while