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研究表明：看电视时吃得多 Entertaining TV programmes make you eat, study finds [ 2007-06-05 09:11 ] People eat more when they are glued to the television, and the moreentertaining the programme, the more they eat, according to newresearch. It seems that distracted brains do not notice what the mouth is doing,said Dr Alan Hirsch, neurological director of the Smell and TasteTreatment and Research Foundation in Chicago.Hirsch explored the impact of smell, taste and eating behaviors whilewatching TV by measuring potato chip consumption.Forty-five volunteers ate as many chips as they wanted duringfive-minute intervals while they watched monologues by late-night talkshow hosts David Letterman and Jay Leno.They also were given chips to eat when the television was off.Hirsch found people ate an average of 44 per cent more chips whilewatching Letterman and 42 per cent more while viewing Leno, than when theydid not watch TV."If you can concentrate on how the food tastes you'll eat less becauseyou'll feel full faster," Hirsch said in an interview at the EndocrineSociety's annual meeting in Toronto."So if that's the case, let's look at the opposite. What if you'redistracted? If you're distracted, in theory, then you'd eat more."Through his research at the foundation, Hirsch has helped peopleovercome the loss of sense and taste sensation, which typically results inweight gain because the brain does not know when it should stop eating.The ventromedial nucleus in the hypothalamus, where the so-calledsatiety centre is located, tells the body whether it is hungry or full. Ifit is inhibited or tricked, the result can be changes in eating patterns,he said."People who cook spaghetti all day don't feel like eating spaghetti atthe end of the day," said Hirsch. "By being exposed to a smell all daylong it's tricking the hypothalamus."Volunteers were asked to concentrate on the sensory characteristics ofthe food such as taste and smell. Researchers say these sensory clues, inaddition to internal body changes, signal satiety.But when distracted, a person does not pay attention to either thebody's sensations of feeling full, or to the sensory characteristics ofthe food.Many studies have linked obesity to watching television and that linkis likely due to inactivity, Hirsch said. But perhaps entertaining showsare also contributing."If you want to lose weight, turn off the television or watch somethingboring," he said. | 
