<br/>The health benefits of water are manifold and according to a new study two more have been added to the list now, it raises alertness and blood pressure too. Researchers at Vanderbilt University Medical Center of the US, have carried out the study and found drinking water increases the activity of the nervous system, which raises alertness, blood pressure and energy expenditure.<br/><br/>Lead researcher Prof David Robertson said that water dilutes the plasma in the blood vessels leading away from the duodenum and that this short-lived reduction in salt concentration is responsible for water's blood pressure-raising effect.<br/><br/>The findings have been published in the latest edition of the 'Hypertension' journal.<br/>