Consistently getting a good night's sleep may be one of the answers to maintaining a healthy weight, if early research findings are correct.
The small study found that when healthy young men slept for only fours hours on two nights in a row, they showed dips in a hormone that suppresses appetite, coupled with increases in an appetite-stimulating hormone.
On top of that, the volunteers reported being more hungry after their sleep-deprived nights than after nights when they slept for 10 hours.
Though more research is needed, the new findings suggest that "if you do not run a sleep debt, you will be able to curb your appetite more easily and maintain or lose weight," study leader Dr. Eve Van Cauter, a professor of medicine at the University of Chicago, told Reuters Health.
The two appetite-regulating hormones in question are leptin, which is released from fat cells and helps alert the brain that it's time to stop eating, and ghrelin, which is produced in the stomach and helps trigger hunger.
Van Cauter's team found that when the 12 men in their study slept for four hours on two consecutive nights, their levels of leptin were 18 percent lower and their levels of ghrelin were 28 percent higher than they were after two nights of spending 10 hours in bed.
The exact reasons for the hormonal changes associated with sleep deprivation are not yet known. According to Van Cauter, the mechanism may have to do with a small area in the brain where neurons respond to both eating and sleeping.
美國科學家最近在該國醫(yī)學期刊《內科年鑒》上發(fā)表研究報告指出，長期充足和健康的睡眠可能是很好地控制體重的原因之一。
據路透社12月7日報道，科學家經研究發(fā)現，如果健康的年輕男性連續(xù)兩晚只睡4個小時，他們體內抑制食欲的激素水平就會下降，同時刺激食欲的激素水平會上升。負責此項研究的美國芝加哥大學醫(yī)學教授伊夫·考特博士說，盡管還需要進一步研究，但這項新的實驗結果顯示“如果不缺乏睡眠，那么你將可以輕松地控制食欲并成功地保持或降低體重”。
此項實驗中研究的兩種可以調節(jié)食欲的激素分別是“萊普汀”(leptin)和“葛瑞林”(ghrelin)。前者由脂肪細胞分泌，幫助提醒大腦“已經飽了”；后者由胃分泌，使人感到饑餓。實驗發(fā)現，與連續(xù)兩晚睡足10個小時相比，連續(xù)兩晚只睡4小時的年輕男子，體內leptin的水平降低了18%，而ghrelin水平則上升了28%。
科學家還發(fā)現，缺乏睡眠的男子對自己的食量和“饑餓等級”的評估也平均上升了24%，他們要的食物多是一些甜食，或者炸薯條和堅果之類的咸食，還有淀粉含量很高的面包和通心粉等?？继卣f，這種與缺乏睡眠有關的激素變化的確切原因還不清楚，這種機制可能與大腦中某個區(qū)域有關，在這個區(qū)域中神經元對飲食和睡眠都會作出反應。
The small study found that when healthy young men slept for only fours hours on two nights in a row, they showed dips in a hormone that suppresses appetite, coupled with increases in an appetite-stimulating hormone.
On top of that, the volunteers reported being more hungry after their sleep-deprived nights than after nights when they slept for 10 hours.
Though more research is needed, the new findings suggest that "if you do not run a sleep debt, you will be able to curb your appetite more easily and maintain or lose weight," study leader Dr. Eve Van Cauter, a professor of medicine at the University of Chicago, told Reuters Health.
The two appetite-regulating hormones in question are leptin, which is released from fat cells and helps alert the brain that it's time to stop eating, and ghrelin, which is produced in the stomach and helps trigger hunger.
Van Cauter's team found that when the 12 men in their study slept for four hours on two consecutive nights, their levels of leptin were 18 percent lower and their levels of ghrelin were 28 percent higher than they were after two nights of spending 10 hours in bed.
The exact reasons for the hormonal changes associated with sleep deprivation are not yet known. According to Van Cauter, the mechanism may have to do with a small area in the brain where neurons respond to both eating and sleeping.
美國科學家最近在該國醫(yī)學期刊《內科年鑒》上發(fā)表研究報告指出，長期充足和健康的睡眠可能是很好地控制體重的原因之一。
據路透社12月7日報道，科學家經研究發(fā)現，如果健康的年輕男性連續(xù)兩晚只睡4個小時，他們體內抑制食欲的激素水平就會下降，同時刺激食欲的激素水平會上升。負責此項研究的美國芝加哥大學醫(yī)學教授伊夫·考特博士說，盡管還需要進一步研究，但這項新的實驗結果顯示“如果不缺乏睡眠，那么你將可以輕松地控制食欲并成功地保持或降低體重”。
此項實驗中研究的兩種可以調節(jié)食欲的激素分別是“萊普汀”(leptin)和“葛瑞林”(ghrelin)。前者由脂肪細胞分泌，幫助提醒大腦“已經飽了”；后者由胃分泌，使人感到饑餓。實驗發(fā)現，與連續(xù)兩晚睡足10個小時相比，連續(xù)兩晚只睡4小時的年輕男子，體內leptin的水平降低了18%，而ghrelin水平則上升了28%。
科學家還發(fā)現，缺乏睡眠的男子對自己的食量和“饑餓等級”的評估也平均上升了24%，他們要的食物多是一些甜食，或者炸薯條和堅果之類的咸食，還有淀粉含量很高的面包和通心粉等?？继卣f，這種與缺乏睡眠有關的激素變化的確切原因還不清楚，這種機制可能與大腦中某個區(qū)域有關，在這個區(qū)域中神經元對飲食和睡眠都會作出反應。