Sleep Quality Is Associated With Habitual Physical Activity In Overweight, Older Adults: 2371 Board #290 May 28 3:00 PM - 4:30 PM

Poor sleep quality has been associated with negative health outcomes. This relationship has mostly been documented in middle-age and young adults with less focus on older adults. Therefore, the PURPOSE of this cross-sectional study was to examine relationships between sleep duration/quality with body composition, physical activity, blood lipids, and indicators of blood glucose control. METHODS: In 34 overweight (BMI ≥ 27 kg/m2) older adults (≥58 years) enrolled in a longitudinal weight-loss and exercise training study, baseline measures of body composition [skeletal muscle mass (SMM), visceral fat area (VFA) and fat mass (FM)]; cardiorespiratory fitness (VO2max, indirect calorimetry); moderate-to-vigorous physical activity (MVPA, 7-day accelerometry); blood lipids/glucose/HbA1c (point-of-care analyzer); and sleep quality and duration (Pittsburgh Sleep Quality Index ,PSQI) were assessed. PSQI scores can range from 0-21 with higher values representing lower sleep quality. Pre-intervention relationships among these variables were analyzed utilizing partial correlations, controlling for age and sex. Significance was set at ɑ<0.05. RESULTS: Mean values were age: 64.3 ± 4.5 years; BMI: 35.3 ± 5.0 kg/m2; VFA: 217.8±41.5 cm2; sleep duration: 6.8±1.2 hours; PSQI score: 10.6±1.3; VO2max: 15.6±3.8 ml/kg/min; MVPA: 45.6±22.8 min/day; HbA1c:5.5± 0.5% . Sleep score was correlated with MVPA (-0.41, p< 0.05), but not BMI, VFA, FM, or VO2max. CONCLUSION: These preliminary data suggest that higher levels of MVPA were associated with better sleep quality in older adults. However, unlike previous studies, we found no relationship between indices of body composition and sleep quality. This study was supported by a grant from the National Institute on Aging (R15 AG055923-01)