24 hours offline every week has made a world of difference for my health, sanity, and happiness

Stress — on the job and off — has been called a health epidemic by the World Health Organization. It makes us more prone to a host of maladies, such as heart disease, high blood pressure, obesity, diabetes, and cancer. And it's estimated to kill more than 120,000 American workers each year. It's not just work, of course. It's how we work. Our smartphones tether us to our 9-to-5 jobs 24/7. We're online, all the time. Day and night. Weekday and weekend. Technology, supposed to make our lives easier, has made it a lot more complicated.

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