Sleep quality refers to how well you sleep and how rested you feel when you wake up. It's about the depth and undisturbed nature of your sleep, as well as how refreshed you feel afterwards. Full definition
In this way, they hope to discover treatments that will improve sleep quality in old age. (sciencedaily.com)
(1) Poor sleep quality with longer duration sleep has been reported in common among women who report high pain score. (integrativewomenshealthinstitute.com)
Especially given the many benefits of vitamin D and only the slight changes in sleep quality noted in this one study. (drcolinobrien.ca)