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Prev Med. 2014 Aug;65:23-7. doi: 10.1016/j.ypmed.2014.04.005. Epub 2014 Apr 13.

Patterns of sedentary time and cardiometabolic risk among Canadian adults.

Author information

  • 1Faculty of Physical Education and Recreation, University of Alberta, Edmonton, AB, Canada; Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, ON, Canada. Electronic address: vlcarson@ualberta.ca.
  • 2Health Analysis Division, Statistics Canada, Ottawa, ON, Canada.
  • 3The University of Queensland, School of Population Health, Brisbane, Queensland, Australia.
  • 4The University of Queensland, School of Population Health, Brisbane, Queensland, Australia; Baker IDI Heart and Diabetes Institute, Melbourne, Victoria, Australia.
  • 5Healthy Active Living and Obesity Research Group, CHEO Research Institute, Ottawa, ON, Canada; Department of Pediatrics, University of Ottawa, Ottawa, ON, Canada.

Abstract

OBJECTIVE:

The aim of this study is to examine the associations of total sedentary time and patterns of sedentary time with cardiometabolic biomarkers in a large representative sample of Canadian adults.

METHODS:

The study is based on 4935 adults aged 20-79years, from the 2007/09 and 2009/11 Canadian Health Measures Survey. Total sedentary time, patterns of sedentary time (≥20minute prolonged sedentary bouts, number of sedentary breaks), and moderate- to vigorous-intensity physical activity (MVPA) were accelerometer-derived. Waist circumference, systolic and diastolic blood pressure, high-density lipoprotein (HDL) cholesterol, and C-reactive protein were measured. Triglycerides, low-density lipoprotein (LDL) cholesterol, insulin, and glucose were also measured in a fasting sub-sample (n=2551).

RESULTS:

Total sedentary time and time in ≥20minute prolonged sedentary bouts were associated with higher insulin and lower diastolic blood pressure levels (P<0.05). On average, each additional 10 breaks/day was associated with 0.83 (95%CI: 1.35, 0.31) cm lower waist circumference, 0.32 (0.62, 0.02) mmHg lower systolic blood pressure, 0.01 (0.00, 0.02) mmol/l higher HDL-cholesterol, 3.72 (1.34, 6.13) % lower triglycerides, 0.57 (0.23, 0.92) % lower glucose, and 4.19 (1.80, 6.63) % lower insulin.

CONCLUSION:

These findings in a large representative sample of Canadian adults indicate that breaking up sedentary time may be particularly important for cardiometabolic health.

Copyright © 2014 Elsevier Inc. All rights reserved.

KEYWORDS:

Adult; Cardiovascular diseases; Insulin resistance; Sedentary lifestyle

PMID:
24732719
[PubMed - indexed for MEDLINE]
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