seriously, you have to wonder about his shoes and his foot problems. The wrong shoes will cause injuries. It is a proven fact.
I remember that Yao has a lifelong contract with Reebok, you would see the advertisement of Yao for Reebok in Chinese sport's shop.
When Yao first came to the NBA he had a deal with Nike then he opted to go with Reebok. I think Reebok does a horrible job of pushing its players. Iverson has been with Reebok for over a decade and his shoes never sold well even when he was in his prime. I guess Reebok just banks on the fact that people in China buy the shoes because I've yet to see Yao's shoe for sale anywhere in Houston.