Some 400 Olympic volunteers will present medals to athletes as ceremony hosts. They are doing exercises in poise include "standing in five- to six-inch heels with jaws tucked in while balancing a 16-page book on their head and keeping a sheet of paper between their knees, for at least an hour. A total of 74,615 volunteers will work in Beijing and another 7,600 will be based at the six co-host cities.