%0 Journal Article %T Local Labor Market Fluctuations and Physical Activity among Adults in the United States, 1990¨C2009 %A Ruopeng An %A Junyi Liu %J ISRN Public Health %D 2012 %R 10.5402/2012/318610 %X Being physically active is a key health promotion strategy. The late-2000s economic downturn, labeled the ¡°Great Recession,¡± could have profound impact on individuals' health behaviors including engagement in physical activity. We investigated the relationship between local labor market fluctuations and physical activity among adults 18 years and older in the United States by linking individual-level data in the Behavioral Risk Factor Surveillance System 1990¨C2009 waves to unemployment rate data by residential county and survey month/year. The association between labor market fluctuations and physical activity was examined in multivariate regressions with county and month/year fixed effects. Deteriorating labor market conditions were found to predict decreases in physical activity¡ªa one percentage point increase in monthly county unemployment rate was on average associated with a reduction in monthly moderate-intensity physical activity of 0.18 hours. There was some preliminary evidence on the heterogeneous responses of physical activity to local labor market fluctuations across age and income groups and races/ethnicities. Findings of this study suggest special attentions to be paid to the potential detrimental impact of major recessions on physical activity. This correlational study has design and measurement limitations. Future research with longitudinal or experimental study design is warranted. 1. Introduction Being physically active is essential to improving overall health and fitness and preventing adverse health outcomes and diseases, such as coronary heart disease, stroke, type 2 diabetes, osteoporosis, and depression [1]. The late-2000s economic downturn, labeled the ¡°Great Recession¡±, could have profound impact on individuals¡¯ health behaviors including engagement in physical activity. Such concerns are highlighted in recent medical journal editorials: ¡°Job insecurity, unemployment, and deterioration of working conditions are all potentially harmful to population health and require urgent attention¡± [2]; ¡°The economic downturn can be expected to reduce nutrition quality and physical activity, worsening obesity prevalence when society is least able to bear the escalating financial burden¡± [3]. A number of hypotheses have proposed causal links between economic conditions and physical activity. One popular hypothesis among economists is related to time use¡ªa reduction of hourly wages during recessions (or even the absence of paid work options) lowers the opportunity cost of time, creating incentives for people to increase leisure-time activities %U http://www.hindawi.com/journals/isrn.public.health/2012/318610/