另外，睡眠障碍，例如睡眠呼吸暂停、周期性肢动症等都与年龄有关，并且会影响睡眠质量。

In addition, specific sleep disorders such as sleep apnea and periodic limb movement disorder are also associated with age, and affect sleep.

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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。

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

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例如，女性在心脏病发作前更有可能经历睡眠紊乱、焦虑和异常疲劳。

For example, women are more likely to experience disturbed sleep, anxiety and unusual fatigue before a heart attack.

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