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Genes & Cells

Inheriting sleep habits, plus more in this week’s news

1:27pm, February 18, 2011

Heritable sleep
Morning larks can thank their parents for their early waking habit. The team captured physical activity using monitors worn on the hip and used sleep diaries to learn the sleep habits of 723 Old Order Amish in Lancaster County, Penn. This insular population lives free from many sleep-confounding technological gadgets. On average, men work up at 4:59 a.m., while women slept in until about 5:14 a.m. Whether a subject rose early or late depended heavily on the waking habits of his or her relatives, researchers from the University of California, San Francisco and colleagues report in an upcoming Sleep. —Laura Sanders

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