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(guó)科學(xué)家最近在該國(guó)醫(yī)學(xué)期刊《內(nèi)科年鑒》上發(fā)表研究報(bào)告指出，長(zhǎng)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(jù)路透社12月7日?qǐng)?bào)道，科學(xué)家經(jīng)研究發(fā)現(xiàn)，如果健康的年輕男性連續(xù)兩晚只睡4個(gè)小時(shí)，他們體內(nèi)抑制食欲的激素水平就會(huì)下降，同時(shí)刺激食欲的激素水平會(huì)上升。負(fù)責(zé)此項(xiàng)研究的美國(guó)芝加哥大學(xué)醫(yī)學(xué)教授伊夫·考特博士說(shuō)，盡管還需要進(jìn)一步研究，但這項(xiàng)新的實(shí)驗(yàn)結(jié)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(xiàng)實(shí)驗(yàn)中研究的兩種可以調(diào)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(xì)胞分泌，幫助提醒大腦“已經(jīng)飽了”；后者由胃分泌，使人感到饑餓。實(shí)驗(yàn)發(fā)現(xiàn)，與連續(xù)兩晚睡足10個(gè)小時(shí)相比，連續(xù)兩晚只睡4小時(shí)的年輕男子，體內(nèi)leptin的水平降低了18%，而ghrelin水平則上升了28%。
科學(xué)家還發(fā)現(xiàn)，缺乏睡眠的男子對(duì)自己的食量和“饑餓等級(jí)”的評(píng)估也平均上升了24%，他們要的食物多是一些甜食，或者炸薯?xiàng)l和堅(jiān)果之類(lèi)的咸食，還有淀粉含量很高的面包和通心粉等。考特說(shuō)，這種與缺乏睡眠有關(guān)的激素變化的確切原因還不清楚，這種機(jī)制可能與大腦中某個(gè)區(qū)域有關(guān)，在這個(gè)區(qū)域中神經(jīng)元對(duì)飲食和睡眠都會(huì)作出反應(yīng)。
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(guó)科學(xué)家最近在該國(guó)醫(yī)學(xué)期刊《內(nèi)科年鑒》上發(fā)表研究報(bào)告指出，長(zhǎng)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(jù)路透社12月7日?qǐng)?bào)道，科學(xué)家經(jīng)研究發(fā)現(xiàn)，如果健康的年輕男性連續(xù)兩晚只睡4個(gè)小時(shí)，他們體內(nèi)抑制食欲的激素水平就會(huì)下降，同時(shí)刺激食欲的激素水平會(huì)上升。負(fù)責(zé)此項(xiàng)研究的美國(guó)芝加哥大學(xué)醫(yī)學(xué)教授伊夫·考特博士說(shuō)，盡管還需要進(jìn)一步研究，但這項(xiàng)新的實(shí)驗(yàn)結(jié)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(xiàng)實(shí)驗(yàn)中研究的兩種可以調(diào)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(xì)胞分泌，幫助提醒大腦“已經(jīng)飽了”；后者由胃分泌，使人感到饑餓。實(shí)驗(yàn)發(fā)現(xiàn)，與連續(xù)兩晚睡足10個(gè)小時(shí)相比，連續(xù)兩晚只睡4小時(shí)的年輕男子，體內(nèi)leptin的水平降低了18%，而ghrelin水平則上升了28%。
科學(xué)家還發(fā)現(xiàn)，缺乏睡眠的男子對(duì)自己的食量和“饑餓等級(jí)”的評(píng)估也平均上升了24%，他們要的食物多是一些甜食，或者炸薯?xiàng)l和堅(jiān)果之類(lèi)的咸食，還有淀粉含量很高的面包和通心粉等。考特說(shuō)，這種與缺乏睡眠有關(guān)的激素變化的確切原因還不清楚，這種機(jī)制可能與大腦中某個(gè)區(qū)域有關(guān)，在這個(gè)區(qū)域中神經(jīng)元對(duì)飲食和睡眠都會(huì)作出反應(yīng)。