More than 90,000 new cancer cases a year in the United States may be due to physical inactivity and prolonged periods of sitting, a new analysis shows. The analysis, being presented today at the annual conference of the American Institute for Cancer Research (AICR) in Washington, D.C., cites about 49,000 cases of breast cancer and 43,000 of colon cancer… James Levine, a professor of medicine at Mayo Clinic in Rochester, Minn., says many people sit an average of seven to 9½ hours a day. "If you've sat for an hour, you've probably sat too long," he says.

USA Today, Nanci Hellmich, 11/3/11

Additional coverage: Tucson Citizen, Arizona Republic,

Tags: Breast Cancer, Weight, Wellness