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Memes • Dark Mode on Instagram: "Thanks I just wasted 8 hours 🤪 Even if you sleep for 7-9 hours (the recommended amount for most adults), the quality might be low. Sleep cycles through stages like light sleep, deep sleep, and REM (rapid eye movement). Disruptions such as frequent awakenings you don’t remember can prevent you from getting enough restorative deep or REM sleep. This often leaves you groggy, a phenomenon sometimes called “sleep inertia.” Irregular bedtimes or wake times throw off y