睡出自己的苗条身姿

王墩田译

食欲和食量并不是睡眠较少女性体重增加的原因。女人要保持好身材，每天睡足7小时。这和我们能睡的人容易长胖的惯常思维可谓大不相同。看来，女性要减肥，还得注意保证每天7小时睡眠。

ere’s a dreamy weight-loss plan:take a nap. That’s the message from work by Sanjay Patel at Case Western Reserve University in Cleveland,Ohio.His study of more than 68,000 women has found that those who sleep less than 5 hours a night gain more weight over time than those who sleep 7 hours a night.

Controlling for other differences between the groups, Patel found that women who slept 5 hours or less gained 0.7 kilograms more on average over 10 years than 7-hour sleepers.The short-sleeping group was also 32 per cent more likely to have gained 15 kilograms or more,and 15 per cent more likely to have become obese.

Significantly,the short-sleepers consumed fewer calories than those who slept 7 hours,says Patel,who presented his results this week at the American Thoracic Society International Conference in San Diego,California. This finding overturns the common view that overeating among the sleep-deprived explains such weight differences.

Lower metabolic rate or less fidgeting resulting from less sleep may be the reason behind the weight gain,Patel suggests.“It obviously also suggests that getting people to sleep more might be a relatively easy way to help people lose weight,”he says.

打个小盹儿是一个理想的减肥计划：这是来自俄亥俄州克利夫兰市凯斯西储大学桑吉・帕特尔的研究信息。他对超过68000名女性的研究发现，随着时间的推移，那些每晚睡眠少于5个小时的女性能比每晚睡眠7个小时的女性体重增加更多。

在对不同试验组其他差异控制基础上，帕特尔发现，平均每晚睡眠时间仅5小时或不足5小时的女性中比每晚睡眠7个小时的女性在10年时间里多增加体重0.7公斤。睡眠不足组比睡眠正常者多32%的可能会增加15公斤或者更多，多15%的可能会变成肥胖者。

值得注意的是，睡眠不足者比那些每晚睡眠7个小时的人消耗更少的卡路里，帕特尔如是说。他于本周在加利福尼亚圣迭哥举行的美国胸腔协会国际研讨会上提出了他的研究发现。这一发现了以吃得过量来解释睡眠缺乏者体重差异的一般观点。

帕特尔提出，由于缺少睡眠而导致的低新陈代谢率或轻微烦躁可能是体重增加的原因。他说，“这很明显说明，让人们多睡可能是帮助其减肥的一个相对容易的办法。”