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Open Access Thesis
Master of Science (M.S.)
Year Degree Awarded
Month Degree Awarded
Higher levels of allostatic load (AL), a composite measure of the impact of chronic stress on the body, are found among socially marginalized groups compared to privileged groups. AL is associated with premature aging and death, as well as a variety of chronic health conditions that impact quality of life. Effects of AL may be offset by physical activity (PA). Queer populations (including those who identify as lesbian, gay, or bisexual) may be at risk for elevated AL due to repeated exposure to discrimination in the form of sexual minority stress. There is mixed literature on sexual orientation differences in PA and research on AL among queer populations is limited. This study describes sexual orientation differences in the 1) prevalence of PA and mean AL levels and 2) association between PA and AL. Data from the 2001-2015 National Health and Nutrition Examination Survey were used to fit sex-stratified linear regression models assessing sexual orientation (heterosexual, gay/lesbian, bisexual, and heterosexual with same-sex experience) differences as well as sexual orientation-specific associations in PA and AL. AL was assessed using 8 biomarkers, while PA was assessed using metabolic equivalent of task (MET)-hours/week calculated from the Global Physical Activity Questionnaire. Models were adjusted for race/ethnicity, income, education, relationship status, veteran status, and citizenship status. Overall, heterosexual adults reported more PA than their same-sex queer counterparts. Gay men had lower (0.8), while bisexual men had higher AL scores (1.9) than heterosexual men (1.2). Among women, AL score was similar across sexual orientation groups. Overall, more PA was associated with lower AL scores among men and women (badjusted = -0.00508, padjusted=-0.00505, punadjusted =-0.00934, punadjusted =-0.03269, p=0.04), and heterosexual women with same-sex experience (bunadjusted =-0.01059, p=0.02). After adjusting for covariates the association was no longer statistically significant. Consistent with previous work, PA was inversely associated with AL score. PA may be an important modifiable behavior to mitigate some sexual orientation disparities in health.
Putnam, Natalia I., "Sexual Orientation Differences in the Association between Physical Activity and Allostatic Load: Results from the National Health And Nutrition Examination Study" (2023). Masters Theses. 1289.