Recent research has highlighted the link between sleep, work, and poverty, according to a Fast Company news report.

More than ever, working Americans are starved of sleep: Up to 30% of employed adults report routinely sleeping less than 6 hours a night, representing approximately 40.6 million workers. (The American Academy of Sleep Medicine recommends that adults get about 7 to 9 hours of nightly sleep for optimal health, productivity, and alertness.) Short sleepers are also potentially sacrificing their health and safety: Short sleep duration has been linked to obesity, diabetes, hypertension, stroke coronary artery disease, and higher levels of mortality in general.

“My research has shown that individuals with lower socioeconomic status (i.e., less education, unemployed) are more likely to have inappropriate sleep duration and poorer sleep quality,” says Lauren Hale, who is an editor of the journal Sleep Health.

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