Seven Hours of Sleep Is Just About Optimal

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How much sleep does a normal, healthy adult need? The Wall Street Journal reports:

Several sleep studies have found that seven hours is the optimal amount of sleep—not eight, as was long believed—when it comes to certain cognitive and health markers, although many doctors question that conclusion.

Other recent research has shown that skimping on a full night’s sleep, even by 20 minutes, impairs performance and memory the next day. And getting too much sleep—not just too little of it—is associated with health problems including diabetes, obesity and cardiovascular disease and with higher rates of death, studies show.

That’s sort of interesting. In the past, I would have had no idea how to guess at this. I always slept exactly the same every night, so I always felt about the same every morning. Over the past couple of years, however, my sleeping habits have become far more erratic, spanning anywhere from six to eight hours fairly randomly. And sure enough, I’ve vaguely come to the conclusion that six hours makes me feel tired throughout the day, and so does eight hours. Seven hours really does seem to be pretty close to the sweet spot.

Unfortunately, I don’t seem to have much control over this. I wake up whenever I wake up, and that’s that. Today I got up at 6, tried to get back to sleep, and finally gave up. There was nothing to be done about it. And right about now I’m paying the price for that.

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DEMOCRACY DOES NOT EXIST...

without free and fair elections, a vigorous free press, and engaged citizens to reclaim power from those who abuse it.

In this election year unlike any other—against a backdrop of a pandemic, an economic crisis, racial reckoning, and so much daily crazy—Mother Jones' journalism is driven by one simple question: Will America will move closer to, or further from, justice and equity in the years to come?

If you're able to, please join us in this mission with a donation today. Our reporting right now is focused on voting rights and election security, corruption, disinformation, racial and gender equity, and the climate crisis. We can’t do it without the support of readers like you, and we need to give it everything we've got between now and November. Thank you.

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