Objectively-measured sedentary time and its association with markers of cardiometabolic health and fitness among cardiac rehabilitation graduates. (29th August 2020)

• Record Type: Journal Article
• Authors: Prince, Stephanie A; Blanchard, Christopher M; Grace, Sherry L; Reid, Robert D
• Is Part Of: European journal of preventive cardiology. Volume 23:Number 8(2016)
• Page Start: 818
• Page End: 825
• Publication Date: 2020-08-29
• Subjects: Sedentary lifestyle -- motor activity -- heart diseases -- rehabilitation; Cardiovascular system -- Diseases -- Prevention -- Periodicals; Cardiac patients -- Rehabilitation -- Periodicals; 616.12
• DOI: 10.1177/2047487315617101
• Languages: English
• ISSNs: 2047-4873

Abstract

Abstract: Background: Sedentary time is an independent risk factor for cardiometabolic disease and mortality. It is unknown how much time individuals with coronary artery disease spend being sedentary or how their sedentary time relates to markers of health. The objectives of this study were to: (a) quantify sedentary time in a post-cardiac rehabilitation (CR) population, and (b) assess association with cardiometabolic risk, independent of moderate-to-vigorous physical activity. Design: Cross-sectional. Methods: As part of a larger trial, 263 recent CR graduates (∼10 days post-CR, mean age 63.6 ± 9.3 years, 75% male) wore an ActiGraph GT3X accelerometer during waking hours (≥4 days, ≥10 hours/day) to quantify sedentary time (≤150 counts per minute). Spearman correlations were computed to assess relationships between sedentary time (adjusted for wear time) with markers of cardiometabolic health and fitness. Significant markers were examined using multiple linear regressions. Results: Participants spent an average of 8 hours/day sedentary (∼14 bouts/day). Sedentary time was negatively correlated with high-density lipoprotein and V · O2 peak and positively correlated with triglycerides, body mass index and waist circumference. After adjusting for age, sex, medications and moderate-to-vigorous physical activity, hours/day of sedentary time remained significantly associated with logV · O2 peak (β = −0.02, p = 0.001) and body mass index (β = 0.49, p = 0.02). Conclusions: Findings suggest that even among a group of post-CR individuals who are already probably more active than patients who have not undergone CR, sedentary time remains high and is associated with poorer cardiorespiratory fitness, suggesting a possible new area of focus among CR programs.