Breaks in sedentary time

Healy, Genevieve N., Dunstan, David W., Salmon, Jo, Cerin, Ester, Shaw, Jonathan E., Zimmet, Paul Z. and Owen, Neville 2008, Breaks in sedentary time, Diabetes care, vol. 31, no. 4, pp. 661-666, doi: 10.2337/dc07-2046.

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Title Breaks in sedentary time
Author(s) Healy, Genevieve N.
Dunstan, David W.
Salmon, JoORCID iD for Salmon, Jo
Cerin, Ester
Shaw, Jonathan E.
Zimmet, Paul Z.
Owen, Neville
Journal name Diabetes care
Volume number 31
Issue number 4
Start page 661
End page 666
Total pages 6
Publisher American Diabetes Association
Place of publication Alexandria, Va.
Publication date 2008-04
ISSN 0149-5992
Keyword(s) clinical care
psychosocial research
Summary OBJECTIVE--Total sedentary (absence of whole-body movement) time is associated with obesity, abnormal glucose metabolism, and the metabolic syndrome. In addition to the effects of total sedentary time, the manner in which it is accumulated may also be important. We examined the association of breaks in objectively measured sedentary time with biological markers of metabolic risk.

RESEARCH DESIGN AND METHODS--Participants (n = 168, mean age 53.4 years) for this cross-sectional study were recruited from the 2004-2005 Australian Diabetes, Obesity and Lifestyle study. Sedentary time was measured by an accelerometer (counts/[minute-1] < 100) worn during waking hours for seven consecutive days. Each interruption in sedentary time (counts/min [greater than or equal to] 100) was considered a break. Fasting plasma glucose, 2-h plasma glucose, serum triglycerides, HDL cholesterol, weight, height, waist circumference, and resting blood pressure were measured. MatLab was used to derive the breaks variable; SPSS was used for the statistical analysis.

RESULTS--Independent of total sedentary time and moderate-to-vigorous intensity activity time, increased breaks in sedentary time were beneficially associated with waist circumference (standardized ß = -0.16, 95% CI -0.31 to -0.02, P = 0.026), BMI (ß = -0.19, -0.35 to -0.02, P = 0.026), triglycerides (ß = -0.18, -0.34 to -0.02, P = 0.029), and 2-h plasma glucose (ß = -0.18, -0.34 to -0.02, P = 0.025).

CONCLUSIONS--This study provides evidence of the importance of avoiding prolonged uninterrupted periods of sedentary (primarily sitting) time. These findings suggest new public health recommendations regarding breaking up sedentary time that are complementary to those for physical activity.
Language eng
DOI 10.2337/dc07-2046
Field of Research 111706 Epidemiology
Socio Economic Objective 920205 Health Education and Promotion
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2008, American Diabetes Association
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