Objectively measured sedentary time may predict insulin resistance independent of moderate- and vigorous-intensity physical activity
Diabetes, ISSN: 0012-1797, Vol: 58, Issue: 8, Page: 1776-1779
2009
- 192Citations
- 219Captures
- 1Mentions
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Metrics Details
- Citations192
- Citation Indexes189
- 189
- CrossRef158
- Policy Citations2
- Policy Citation2
- Clinical Citations1
- PubMed Guidelines1
- Captures219
- Readers219
- 219
- Mentions1
- News Mentions1
- News1
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Article Description
OBJECTIVE - To examine the prospective association between objectively measured time spent sedentary and insulin resistance and whether this association is independent of moderate- and vigorous-intensity physical activity (MVPA) and other relevant confounders. RESEARCH DESIGN AND METHODS - This was a population-based study (Medical Research Council Ely study) in 376 middle-aged adults (166 men; 210 women) over 5.6 years of follow-up. Physical activity and sedentary time were measured objectively by individually calibrated minute-by-minute heart rate monitoring at both baseline and follow-up. Sedentary time was calculated as the heart rate observations (in minutes) below an individually predetermined threshold (flex heart rate) and expressed as a percentage of total monitored time during waking hours over 4 days. The percentage of time spent above 1.75 x resting heart rate represented MVPA. Fasting plasma insulin was used as a surrogate measure of insulin resistance. RESULTS - Time spent sedentary at baseline was significantly and positively associated with log fasting insulin at follow-up (β = 0.003, 95% CI 0.0006-0.006, P = 0.015) independent of baseline age, sex, fat mass, fasting insulin, smoking status, and follow-up time. After further adjustment for MVPA, this association was somewhat strengthened (β = 0.004, 95% CI 0.0009-0.006, P = 0.009). CONCLUSIONS - Time spent sedentary predicts higher levels of fasting insulin independent of the amount of time spent at moderate- and vigorous-intensity activity levels. This highlights the importance of reducing sedentary time in order to improve metabolic health, possibly in addition to the benefits associated with a physically active lifestyle. © 2009 by the American Diabetes Association.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=68049142427&origin=inward; http://dx.doi.org/10.2337/db08-1773; http://www.ncbi.nlm.nih.gov/pubmed/19470610; https://diabetesjournals.org/diabetes/article/58/8/1776/15206/Objectively-Measured-Sedentary-Time-May-Predict; https://dx.doi.org/10.2337/db08-1773; http://diabetes.diabetesjournals.org/content/58/8/1776; http://diabetes.diabetesjournals.org/content/58/8/1776.abstract; http://diabetes.diabetesjournals.org/content/58/8/1776.full.pdf; http://diabetes.diabetesjournals.org/cgi/doi/10.2337/db08-1773; https://diabetes.diabetesjournals.org/content/58/8/1776; https://diabetes.diabetesjournals.org/content/58/8/1776.abstract; https://diabetes.diabetesjournals.org/content/diabetes/58/8/1776.full.pdf; http://diabetes.diabetesjournals.org/lookup/doi/10.2337/db08-1773
American Diabetes Association
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