Another idea, floated by her team recently, is to stress that the states she has won have more electoral votes in the November poll than the states won by Mr Obama.

ECONOMIST: Hillary Clinton has few weapons to hand

It measures what HeartMath calls coherence an algorithm applied to heart-rate variability, which the company says can reflect emotional states and stress levels.

WSJ: Review of Tink�� and HeartMath Inner Balance Sensor for iOS

The report states that severe stress could trigger depression, anxiety, workplace injuries and suicide, and lead to a greater risk of heart disease.

BBC: Work stress hits people in and out of work

Russia did not veto the debate, as it could have, but was not enthusiastic and the United States chose to stress the role that governments should play.

BBC: Security Council takes on global warming

That prompted Transportation Secretary Mary Peters to advise states to carefully consider any additional stress placed on bridges during construction projects.

NPR: Officials Warn of Possible Flaw in Nation's Bridges

With the euro in crisis and the EU under extraordinary stress, some might wonder why the western Balkan states are so keen to join.

ECONOMIST: The Balkans and Europe

Europe has hesitated more than the United States to subject its banks to measures like stress tests because of an entrenched belief that it would be better to wait for the market to recover and for the bad assets that banks still hold to pick up on value.

FORBES: Global Economy

The Stress in America survey was conducted online within the United States by Harris Interactive on behalf of the American Psychological Association between August 11 and September 6, 2011, among 1, 226 adults aged 18 and older who reside in the U.S. In addition to the 1, 226 interviews among the general population, oversamples of 300 caregivers and 1, 221 people living with chronic illnesses were also included in the 2011 research.

FORBES: Study: Stress In America - 8 Cities Explored

Not only may this help remove unpleasant memories, such as those involved in post-traumatic stress disorder, but it may also help to return the brains of addicts to their pre-addicted states.

ECONOMIST: Cognitive enhancement