Researchers found the stress of thinking caused overeating with heavy thinkers seeking out more calories.

    The research team, supervised by Dr Angelo Tremblay, measured the spontaneous food intake of 14 students after each of three tasks.

    The first was relaxing in a sitting position, the second reading and summarizing a text, and finally completing a series of memory, attention, and vigilance tests on the computer.

    After 45 minutes at each activity, participants were invited to eat as much as they wanted from a buffet.

    The researchers had already discovered that each session of intellectual work requires only three calories more than the rest period.

    However, despite the low energy cost of mental work, the students spontaneously consumed 203 more calories after summarizing a text and 253 more calories after the computer tests.

    This represents a 23.6 per cent and 29.4 per cent increase, respectively, compared with the rest period.

    Blood samples taken before, during, and after each session revealed that intellectual work causes much bigger fluctuations in glucose and insulin levels than rest periods.

    Jean-Philippe Chaput, the study's main author, said: "These fluctuations may be caused by the stress of intellectual work, or also reflect a biological adaptation during glucose combustion."

    The body could be reacting to these fluctuations by spurring food intake in order to restore its glucose balance, the only fuel used by the brain.

    Mr Chaput added: "Caloric overcompensation following intellectual work, combined with the fact we are less physically active when doing intellectual tasks, could contribute to the obesity epidemic currently observed in industrialised countries.

    "This is a factor that should not be ignored, considering that more and more people hold jobs of an intellectual nature."

    The results of the study, carried out at Universite Laval in Quebec, Canada, are published in the journal Psychosomatic Medicine. 

    研究人員發(fā)現(xiàn), 思考的壓力會(huì)導(dǎo)致飲食過量

    由安吉羅.川柏雷所領(lǐng)導(dǎo)的研究團(tuán)隊(duì), 針對(duì)14位學(xué)生在正常三餐以外, 無意識(shí)的飲食習(xí)性做出上述結(jié)論

    實(shí)驗(yàn)分為三步驟: 首先是放松的閑坐著; 接下來是閱讀與匯整資料; 最后是在電腦上完成一系列有關(guān)記憶, 注意力與警覺性的測(cè)試.

    每一步驟進(jìn)行45分鐘, 結(jié)束時(shí)受測(cè)者均可以無限制的隨意享用餐點(diǎn)

    研究人員發(fā)現(xiàn), 相較于其它兩個(gè)步驟, 需要?jiǎng)幽X筋的步驟僅需多耗約三個(gè)卡路里的能量

    雖然動(dòng)腦筋只消耗少量的卡路里, 但學(xué)生們卻無意識(shí)地在匯整資料后多消耗203卡, 而在完成電腦相關(guān)測(cè)試后多耗了253卡

    也就是相較于放松的閑坐, 對(duì)于卡路里的需求, 后兩個(gè)步驟分別增長(zhǎng)了23.6%與29.4%

    而分別在測(cè)試前, 中, 后所做的血液抽樣檢驗(yàn)也顯示, 需要?jiǎng)幽X的步驟對(duì)于葡萄糖與胰島素的需求波動(dòng)遠(yuǎn)大于其他的步驟.

    該實(shí)驗(yàn)的主要實(shí)施人, 琴-菲利浦. 查普特說: 這種波動(dòng)可能來自于腦力激蕩后所帶來的壓力, 也可能反映出身體機(jī)能在調(diào)適上對(duì)于葡萄糖的消耗需求變動(dòng)

    我們的身體會(huì)因?yàn)榇竽X執(zhí)行作業(yè)而消耗能量, 于是藉由攝取食物以均恒體內(nèi)葡萄糖的方式來對(duì)這種變動(dòng)采取反應(yīng)

    查普特先生補(bǔ)充: 由于在腦力活動(dòng)后對(duì)于熱量的過度補(bǔ)充, 加上在腦力活動(dòng)時(shí)一般很少有相對(duì)應(yīng)的體力消耗, 于是造成現(xiàn)在很多工業(yè)化國(guó)家中常見的肥胖現(xiàn)象

    “這是一項(xiàng)不容忽視的重要因素, 特別是越來越多人從事著腦力活動(dòng)的工作＂

    該項(xiàng)研究報(bào)告由加拿大魁北克省Laval大學(xué)完成, 并刊載于＂身體與心理醫(yī)學(xué)＂雜志