Nearly 40 percent of all currently employed American adults have jobs that require both frequent exertion and frequent standing, according to a new report published by the Centers for Disease Control and Prevention. The report is based on responses to an occupational health supplement to the 2015 National Health Interview Survey, the largest in-person health survey in the United States. The NHIS generated more than 17,400 responses to questions about the frequency with which working adults engage in repetitive lifting, pulling, pushing, or bending, and in standing or walking while at work. After weighting the responses to be nationally representative, CDC determined that an estimated 52.7 million American adults have jobs that require frequent exertion and standing. The report also presents weighted data on the prevalence of frequent exertion and frequent standing within the industry and occupational groups identified by the North American Industry Classification System.  Further information from the report appears below.