Feet hurt?

Pedestrians in Singapore were crowned the world's fastest movers, walking 30 percent faster than they did in the early 1990s, and in China, the pace of pacing in Guangzhou has increased by more than 20 percent.
http://www.themoscowtimes.com/stories/2007/05/04/255.html

No wonder my feet blister and leg sometimes hurt after a day out.