http://au.news.yahoo.com/nsw/a/20232711/standing-classroom-trial/
As silly as it sounds, the explanation makes total sense.
http://www.nbcnews.com/id/3404446/#.Ul2LilBvOI4
Read the article to find out. It is scary.
http://mashable.com/2011/05/09/sitting-down-infographic/
