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Increasing sleepiness over 5 years doubled dementia risk among cognitively unimpaired women in their 80s. Sleep efficiency, wake after sleep onset, and nap duration and frequency were individually ...

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When young adults start working, the amount of daily physical activity they do increases sharply, only to fall away again over the new few years, while the amount of sleep they get falls slightly, ...

UC San Diego PhD student Varun Viswanath is the paper's corresponding author. The researchers analyzed data from the Oura ring, a smart wearable that tracks temperature, sleep and other information.