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Increased cardiometabolic risk is associated with increased TV viewing time
Katrien Wijndaele1, Genevieve N Healy, David W Dunstan
1Cancer Prevention Research Centre, School of Population Health, University of Queensland, Herston, Queensland, Australia.
Medicine and Science in Sports and Exercise
|February 9, 2010
Summary
Increased television viewing time is linked to worsening cardiometabolic risk factors like increased waist circumference and blood pressure, particularly in women. This highlights the importance of monitoring sedentary behavior for metabolic health.
Area of Science:
- Cardiovascular Health
- Metabolic Syndrome Research
- Public Health & Epidemiology
Background:
- Sedentary behaviors, such as television viewing, are increasingly prevalent.
- Existing research suggests a link between television viewing time and metabolic syndrome components.
- The impact of changes in television viewing time on cardiometabolic risk biomarkers over time requires further investigation.
Purpose of the Study:
- To investigate the association between baseline and 5-year changes in self-reported television viewing time and changes in cardiometabolic risk biomarkers.
- To assess these associations independently of leisure-time physical activity.
- To examine effects on waist circumference, triglycerides, HDL-cholesterol, blood pressure, fasting plasma glucose, and a clustered cardiometabolic risk score.
Main Methods:
- Prospective cohort study (Australian Diabetes, Obesity and Lifestyle Study - AusDiab).
- Baseline (1999-2000) and 5-year follow-up (2004-2005) data from 3846 Australian adults (aged >=25 years).
- Multiple linear regression analysis to assess associations between television viewing time changes and cardiometabolic biomarker changes.
Main Results:
- Increased television viewing time (10 h/week) over 5 years was associated with increased waist circumference in both men and women.
- Increases in television viewing time were linked to higher diastolic blood pressure and a higher clustered cardiometabolic risk score in women.
- These associations remained significant after adjusting for physical activity and other confounders.
Conclusions:
- An increase in television viewing time is associated with adverse changes in cardiometabolic biomarkers.
- Findings suggest that rising sedentary time may contribute to metabolic risk.
- Further research with objective measures is needed to confirm causality.
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