| Am J Clin Nutr ：边看电脑边吃饭会影响记忆力 电脑, Clin, Nutr, 记忆力, 吃饭 不少人因为事务繁忙，常常边看电脑边吃饭。英国一项研究表明，这会影响人的记忆力，令人饭后吃下更多甜食。 进食实验 英国布里斯托尔大学研究人员找来44名志愿者，分成两组：第一组人边用电脑玩纸牌游戏边用午餐，第二组则专心致志地用相同的午餐。每份午餐包括9种食品。 饭后30分钟，研究人员给志愿者做“味道测试”，让他们随便吃饼干。接着，研究人员让他们回忆午餐时吃了哪些食物，同时回忆吃这些食物的顺序。 研究结果显示，吃饼干时，先前边吃饭边玩电脑的“分心组”人均摄入热量250卡路里，是“专心组”的2倍。另外，与“专心组”相比，“分心组”更难记起午餐时吃下各种食物的顺序，感觉没吃饱的人更多。 研究人员说，实验结果意味着，“分心组”之所以吃更多饼干，可能是因为玩电脑令他们分心，记不清楚午饭时吃过多少东西。 研究报告由American Journal of Clinical Nutrition月刊发表。 影响胃口 微软全国广播公司（MSNBC）12月16日引述研究人员杰夫·布伦斯特伦的话报道：“我们认为，对最近一顿饭的记忆影响人下一顿饭时吃掉的食物数量……记不清楚时，人会在下一顿饭时选择并吃下更多食物。” 他说：“提到记忆力，人们总是想到记住购物清单、人名等等类似的东西。实际上，有时不用想，记忆力就已经在帮我们了。譬如，它帮我们记住走哪条路去上班，还会影响我们的胃口。” 布伦斯特伦认为，研究告诉人们“不要在受干扰时吃饭，也就是说，吃饭时要远离电脑和电视”。 他认为，研究结果对生活在当前“多进程”世界里的人尤为重要，因为越来越多的人喜欢坐在各种屏幕前吃东西，其中不乏儿童。 类似研究 先前类似研究表明，人边看电视边吃饭时，会比坐在餐桌前吃饭吃掉更多食物。这可能是因为人们花更多精力关注电视，忽略胃发出的信号。 |
省部重点实验室
第1楼2010/12/20
“几项研究告诉我们，分心会让人吃更多，”布伦斯特伦说，“这里，我们进一步延伸这一结果，告诉大家分心吃饭的影响饭后也能显现。”
那么，谈话或看报纸等行为是否会影响食欲？
一项实验室研究表明，无论吃饭时看电视还是与朋友交谈，都会令人不知不觉吃下更多食物。另一项研究表明，吃饭时听广播同样会令人食欲大增。Am J Clin Nutr doi: 10.3945/ajcn.110.004580
Playing a computer game during lunch affects fullness, memory for lunch, and later snack intake1,2
Rose E Oldham-Cooper, Charlotte A Hardman, Charlotte E Nicoll, Peter J Rogers, and Jeffrey M Brunstrom
Abstract
Background: The presence of distracting stimuli during eating increases the meal size and could thereby contribute to overeating and obesity. However, the effects of within-meal distraction on later food intake are less clear.
Objective: We sought to test the hypothesis that distraction inhibits memory encoding for a meal, which, in turn, increases later food intake.
Design: The current study assessed the effects of playing solitaire (a computerized card-sorting game) during a fixed lunch, which was eaten at a fixed rate, on memory for lunch and food intake in a taste test 30 min later. A between-subjects design was used with 44 participants. Participants in the no-distraction group ate the same lunch in the absence of any distracting stimuli.
Results: Distracted individuals were less full after lunch, and they ate significantly more biscuits in the taste test than did nondistracted participants (mean intake: 52.1 compared with 27.1 g; P = 0.017). Furthermore, serial-order memory for the presentation of the 9 lunch items was less accurate in participants who had been distracted during lunch.
Conclusions: These findings provide further evidence that distraction during one meal has the capacity to influence subsequent eating. They may also help to explain the well-documented association between sedentary screen-time activities and overweight.
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