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December 09 2011
Chocolate Science #539: Taking a Walk Makes You Eat Less Chocolate
It should come as no surprise that scientists have spent many hours contemplating new tortures for the chocolate-addicted. After all, how else will science know how much, say, boredom, will affect chocolate intake? Or stress? Or watching a psychologist unwrap a chocolate bar? These are the important things, people.
The latest edition of this research addresses a question close to many a cubicle drone’s heart: will exercise reduce the amount of chocolate you eat while at work? Even brief exercise gives the same kind of mood boost that chocolate consumption does, and researchers were interested in seeing whether 15 minutes’ walk would change how much chocolate people working on a computer ate from a nearby bowl. They had 78 people who were confirmed chocolate cravers abstain from chocolate for 2 days (that’s the torturous part), then brought them into the lab to either sit quietly for 15 minutes or walk briskly on a treadmill. They then took them to a desk, casually said that the subjects could help themselves to the chocolates, and had them complete tasks of various levels of difficulty.
This is the part where you lean in a little closer, because it turned out that ...
June 06 2011
To Keep to Your Diet, Pretend You’re Constantly Breaking It
Is this milkshake better than yours?
Congratulating yourself on that calorie-conscious salad might just make you feel hungrier, scientists are now finding—better to close your eyes, take a bite, and pretend you’re eating ice cream.
We’ve already heard in recent years that eating imaginary M&Ms or cheese cubes can give you some of the satiety of the real thing: In a 2010 paper, researchers found that contrary to popular belief, imagining eating such foods in vivid detail actually made subjects eat fewer M&Ms, cheese chunks, and so on. Now, scientists have found that if you believe a shake is low in calories, you’ll feel less satisfied than people who think the shake was an indulgence, even when you’re both drinking the same shake. What gives?
The team (from Yale’s Rudd Center for Food Policy and Obesity) told subjects that a 380-calorie shake had either an indulgent 620 calories or a prudent 140 calories. Then they checked to see what effect that had on subjects’ blood levels of ghrelin, a hormone that triggers hunger and is high before meals and low after. They found that ghrelin didn’t subside afterwards in people who thought they ...
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