4.7 Article

Sedentary Time and Metabolic Risk in Extremely Active Older Adults

Journal

DIABETES CARE
Volume 44, Issue 1, Pages 194-200

Publisher

AMER DIABETES ASSOC
DOI: 10.2337/dc20-0849

Keywords

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Funding

  1. Allan M. McGavin Foundation
  2. Canadian Diabetes Association

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The study found a significant association between sedentary behavior and increasing cardiometabolic risk even in active older adults. Therefore, reducing sedentary time in daily life may help lower cardiometabolic risk in the elderly population.
OBJECTIVE Increasing evidence suggests that time spent sedentary predicts increasing cardiometabolic risk independent of other physical activity. We objectively measured activity levels in active older adults and examined the association between sedentary behavior and the continuous metabolic syndrome risk score (cMSy). RESEARCH DESIGN AND METHODS Older adults (age >= 65 years) were recruited from the Whistler Masters ski team, a group of active older adults who undergo organized group training. Daily activity levels were recorded with accelerometers (SenseWear) worn for 7 days. A compositional approach was used to determine proportion of the time spent sedentary as compared with all other nonsedentary behaviors (isometric log-ratio transformation for time spent sedentary [ILR1]). Waist circumference, triglycerides, HDL, systolic blood pressure, and fasting glucose were measured, and cMSy was calculated using principal component analysis (sum of eigenvalues >= 1.0). RESULTS Fifty-four subjects (30 women and 24 men, mean +/- SE age 71.4 +/- 0.6 years) were recruited. Subjects demonstrated high levels of physical activity (2.6 +/- 0.2 h light activity and 3.9 +/- 0.2 h moderate/vigorous activity). In our final parsimonious model, ILR1 showed a significant positive association with increasing cMSy (standardized beta = 0.368 +/- 0.110, R-2 = 0.40, P = 0.002), independent of age and biological sex. CONCLUSIONS Despite high levels of activity, ILR1 demonstrated a strong association with cMSy. This suggests that even in active older adults, sedentary behavior is associated with increasing cardiometabolic risk.

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