Heavy media use interferes with sleep by reducing sleep duration.

大量使用媒体设备会缩短睡眠时间，从而干扰睡眠。

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For example, sleep duration has declined from some 8 hours in the 1950s to 7 in recent years.

例如，睡眠时间从20世纪50年代的8小时左右下降到近年来的7小时。

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Sleep duration is a modifiable risk factor with potentially important implications for obesity prevention and treatment.

睡眠时间是一个可变危险因素，对肥胖症的预防和治疗有着潜在的重要意义。

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Bartfield said other factors include a person's hydration, sleep duration, sleep patterns and emotions.

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Sleep duration did not significantly affect cancer risk for women of any age in the lower physical activity bracket.

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Segmenting the data industry by industry, workers reported anywhere from 24.1% (other services, except public administration) to 41.6% (mining) incidence of short sleep duration.

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