Need Will Power? Flex Your Muscles

The Journal of Consumer Research reports that flexing any body muscle can enhance one's will power.

In one study, those who tensed their calf muscles were more likely to drink more vinegar.

In another, a much larger percentage of people who clenched their fists were able to look at disturbing images of post-earthquake Haiti.

In another, subjects who tightened their fingers were more likely to choose healthful snacks than non-clenchers.