The positive association between physical activity and alcohol use in African American adults

African Americans have highest incidence and mortality from obesity-related cancers. Physical activity (PA), minimal alcohol use, and maintaining a low body mass index (BMI) are important cancer prevention behaviors, though there is little research on how these behaviors are associated with one another in African Americans. The purpose of this study is to assess the relationship between PA, alcohol use, and BMI using secondary data from an African American cohort recruited from Houston-area churches. Self-administered questionnaires measured self-reported PA, alcohol use, height, weight, and sociodemographic factors. Univariate and multivariable analyses assessed the relation between PA, alcohol use, BMI, controlling for covariates. Participants (N = 1009) were mostly female (77%), employed (72%), and college graduates (55%). Most (53%) reported both light-to-moderate alcohol use & moderate-to-high levels of PA. There was a statistically significant positive linear association between PA and alcohol use (Pearson's r = 0.15, p < 0.001). We also found that every one hour increase per week in PA was associated with 3% increased odds of being a heavy drinker (>2 drinks/day men, >1 drink/day women), as compared to an abstainer (Adjusted OR = 1.03, 95%CI 1.01-1.06). There was a statistically significant inverse association between PA and BMI, but no statistically significant association between alcohol use and BMI. In this sample of African Americans, PA and alcohol use were positively associated, mirroring results among Non-Hispanic Whites. However, alcohol use and BMI were not statistically significantly associated. Cancer and obesity prevention for African Americans should stress PA promotion while emphasizing messaging to curtail any associated increases in alcohol use.