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Research suggests modifiable lifestyle behaviors are associated with delayed cognitive decline. Identifying modifiable lifestyle behaviors in African Americans is critical because they are more likely to be diagnosed with Alzheimer’s disease and other related dementias. Evidence shows the positive effects of physical activity (PA) on cognitive functioning. Sleep quality also impacts cognitive functioning. Therefore, the purpose of this study examined how sleep quality and sex moderated the relationship between PA and cognitive functioning in African Americans. Methods A sample of 147 African Americans (mean age 59) completed the Pittsburgh Sleep Quality Inventory (PSQI) and a battery of cognitive tests (The Delis-Kaplan Executive Function System (DKEFS) Verbal Fluency Test, The Stroop Color Word Test and Trail Making Test). Participants completed a participant screener to determine PA frequency and intensity. Anthropomorphic measures were also obtained. A moderated moderation analysis was conducted. Results Poor sleep quality was associated with poorer performance on a verbal fluency task after controlling for age, BMI and years of education (B=-1.37, p=.012). There was a significant interaction between PA frequency and sleep quality on verbal fluency performance (B=0.42, p=.047). Additionally, there was a significant interaction between sleep quality and sex on verbal fluency performance (B=0.80, p=.016). Further adjustments revealed significant conditional effects such that more frequent PA per week improved verbal fluency performance among women, who reported better sleep quality (B=0.20, p=0.03). Conclusion The current study suggests sleep quality strengthens the relationship between PA and cognitive performance, specifically in African-American women. Consistent with previous studies, our findings support the need to target sleep quality and PA in women as modifiable lifestyle factors that may delay cognitive decline. Support This research was funded by the Office of the Provost at Howard University.

0842 The Moderating Effects of Sleep and Sex on Physical Activity and Cognitive Functioning in African Americans