Chewed gum...

Students who chewed gum for five minutes before taking a test got

better marks than those who didn't chew gum.

Previous research has shown that any type of physical activity improves

brain performance, but this study shows that even minor physical

activity can do so.

The benefits of chewing gum occurred only when it was done for five

minutes before a test, not if it was done during the entire test. This

may be because chewing and thinking conflict with each other, Onyper

suggested in a university news release.