You're in bed by 11, having had a busy, productive day. After a full night's sleep you wake up naturally and feel,.. exhausted. If this sounds familiar, you're not alone. According to a recent survey of over 20,000 people by researchers at Radboud University in the Netherlands, about 30 per cent of visits to doctors involve complaints about being tired all the time. Some 20 per cent of people in the US report having experienced fatigue intense enough to interfere with living a normal life. This hits us in our pockets, too: workers who are unproductive because of fatigue cost US employers more than $100 billion a year.
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