Don't sit tight on flight, it can kill you

If you have a long flight, drinking plenty of water and maintaining body movement can spare you a lot of trouble. Drinking adequate fluids, especially non-alcoholic beverages, is a must during long flights.

http://timesofindia.indiatimes.com/city/delhi/Dont-sit-tight-on-flight-it-can-kill-you/articleshow/38881181.cms