The Third World Squat
By Craig Weller
http://www.t-nation.com/readArticle.do?id=1856085&cr
T-Nation is hit or (mostly) miss, in my opinion, but I found the above link interesting. I started holding a squat sometimes when I'm watching TV. At first I had great difficulty (the muscles of my shin were the limiting factor), but now I can hold it for quite some time.
A recent trip to the Philippines really illuminated, for me, how many people actually rest in this position.
Food for thought, I suppose.