Sleep: Tight

Years went by, and Lily grew up to be a strong and healthy young woman, with a deep appreciation for the importance of sleep. And she never forgot the Sleep Fairy, who had helped her to develop good sleep habits and a lifelong love of reading and relaxation.

Every night, millions of parents tuck their children into bed and whisper, “Goodnight, sleep tight.” It’s a rhythmic, comforting lullaby of a phrase. But have you ever stopped to think about what you’re actually saying? Why “tight”? Are we asking someone to clench their muscles? To hold onto the bed frame? Sleep Tight

Scientifically, sleeping "tight" refers to , which is defined by a lack of frequent arousals, minimal daytime sleepiness, and a general feeling of satisfaction with one's rest. Years went by, and Lily grew up to