Objective-To determine cross-sectional and prospective associations between loneliness and physical activity, and to evaluate the roles of social control and emotion regulation as mediators of these associations.Design-A population-based sample of 229 White, Black, and Hispanic men and women, age 50 to 68 years at study onset, were tested annually for each of 3 years.Main Outcome Measures-Physical activity probability, and changes in physical activity probability over a 3-year period.Results-Replicating and extending prior cross-sectional research, loneliness was associated with a significantly reduced odds of physical activity (OR = 0.65 per SD of loneliness) net of sociodemographic variables (age, gender, ethnicity, education, income), psychosocial variables (depressive symptoms, perceived stress, hostility, social support), and self-rated health. This association was mediated by hedonic emotion regulation, but not by social control as indexed by measures of social network size, marital status, contact with close ties, group membership, or religious group affiliation. Longitudinal analyses revealed that loneliness predicted diminished odds of physical activity in the next two years (OR = 0.61), and greater likelihood of transitioning from physical activity to inactivity (OR = 1.58).Conclusion-Loneliness among middle and older age adults is an independent risk factor for physical inactivity and increases the likelihood that physical activity will be discontinued over time. Keywords loneliness; physical activity; self-regulation; social control; longitudinal Social isolation plays an important role in health and longevity (Peel, McClure, & Bartlett, 2005), in part through its association with poor lifestyle behaviors such as lack of physical activity. Even small increases in physical activity have large effects on mortality (Kokkinos et Correspondence concerning this article should be addressed to Louise C. Hawkley, University of Chicago, 940 E. 57th St., Chicago, IL 60637. hawkley@uchicago.edu. al., 2008). Social isolation predicted declines in level of physical activity over a 9-year period among 4,025 adults in the Alameda County study (Kaplan, Lazarus, Cohen, & Leu, 1991). Social rejection and isolation in childhood predicted significantly less exercise behavior in young adulthood (Caspi et al., 2006).
NIH Public AccessSocial isolation tends to promote feelings of loneliness, which can be defined as the distressing feeling that occurs when one's social relationships are perceived as being less satisfying than what is desired (Peplau & Perlman, 1982). Although social isolation is associated with loneliness, loneliness is more closely related to qualitative than quantitative aspects of social relationships (Hawkley, Burleson, Berntson, & Cacioppo, 2003;Peplau & Perlman, 1982;Russell, Peplau, & Cutrona, 1980). A cross-sectional study of loneliness in 1,289 Australian adults between 18 and 89 years of age revealed that those in the lonely group were more likely than those in the nonlonely group to be...