By Tanner Garrity Fitness wearables with sleep-tracking software emphasize the importance of sleeping through the night. They catalogue “disturbances” (all the times you woke up, whether you remember them or not) and prize a night’s sleep that goes through all four stages (three non-rapid eye movement cycles, then the rapid eye movement cycle) three to four times, over the course of a consistent seven-to-nine hours in bed. After all, this sort of deep, steady sleep is where all the magic happens. Your brain sorts and processes all the things you saw and learned that day; the pituitary gland fl…