More than 35 million adults in the workforce with a musculoskeletal condition reported lost work days in the previous 12 months, totaling nearly 364 million days. Lost work days for persons with a musculoskeletal conditions accounted for more lost work days than any other major health condition, with workers losing an average of 10 days of work. Chronic circulatory conditions, including high blood pressure and heart conditions, accounted for 283 million lost work days, and were reported by an increasing share of the working age population.