Thinking can make us fat?

A small Canadian study has found that people eat more after an intellectual exercise than they do after just sitting quietly for the same amount of time and more or less same amount physical energy. Read it here at http://query.nytimes.com/gst/fullpage.html?res=9502E7DF103DF935A2575AC0A96E9C8B63

The scientists had 14 female students engage in three 45-minute sessions before being invited to eat as much as they wanted at a buffet. For one session, they rested in a sitting position. In the next, they read a document and wrote a summary of it, and in the third they performed a series of computer-based tests.
Even though the same amount of physical energy was involved in all three sessions, the women consumed an average of more than 25 percent more calories after the intellectual exercises than after just sitting quietly. The study, published in the September issue of Psychosomatic Medicine, controlled for habitual diet, body mass, anxiety level and other factors.