Walk this way: U.S. out of step with weight loss

Researchers compared 1,136 U.S. adults wearing pedometers with adults involved in similar studies in Australia, Japan and Switzerland. The mean number of steps Americans take in a day is 5,117, compared with 9,695 for Australians, the walking leaders among the four countries. The USA's 34% adult obesity rate is more than double Australia's 16%.