A definitive work on this subject that started the trend: http://www.amazon.com/Chair-Rethinking-Culture-Body-Design/dp/0393319555/ref=sr_1_2?s=books&ie=UTF8&q

A definitive work on this subject that started the trend: http://www.amazon.com/Chair-Rethinking-Culture-Body-Design/dp/0393319555/ref=sr_1_2?s=books&ie=UTF8&qid=1381257325&sr=1-2&keywords=the+chair http://www.amazon.com/Chair-Rethinking-Culture-Body-Design/d... It is also worth noting that Humans were not meant to stand for 8-12 hours a day non-stop either.