“Do you often feel tired and groggy in the morning, even on nights when you’ve gotten enough sleep? It’s a frustrating experience, but there may be a simple explanation: you have poor sleep quality. Poor sleep quality can impair your focus (concentration), worsen your mood, and is even linked to an increased risk of Alzheimer’s disease.”.

Sleep Deprivation (https://www.sleepfoundation.org/sleep-hygiene/how-to-determine-poor-quality-sleep)