Light-Intensity Physical Activity and Cardiometabolic Biomarkers in US Adolescents

Carson V., Ridgers N.D., Howard B.J., Winkler E.A.H., Healy G.N., Owen N., Dunstan D.W. and Salmon J. (2013) Light-Intensity Physical Activity and Cardiometabolic Biomarkers in US Adolescents. PLoS ONE, 8 8: e71417.1-e71417.7. doi:10.1371/journal.pone.0071417

Author Carson V.
Ridgers N.D.
Howard B.J.
Winkler E.A.H.
Healy G.N.
Owen N.
Dunstan D.W.
Salmon J.
Title Light-Intensity Physical Activity and Cardiometabolic Biomarkers in US Adolescents
Journal name PLoS ONE   Check publisher's open access policy
ISSN 1932-6203
Publication date 2013-08-09
Year available 2013
Sub-type Article (original research)
DOI 10.1371/journal.pone.0071417
Open Access Status DOI
Volume 8
Issue 8
Start page e71417.1
End page e71417.7
Total pages 7
Place of publication San Francisco, United States
Publisher Public Library of Science (PLoS)
Collection year 2014
Language eng
Subject 1100 Agricultural and Biological Sciences
1300 Biochemistry, Genetics and Molecular Biology
2700 Medicine
Formatted abstract
Background:The minimal physical activity intensity that would confer health benefits among adolescents is unknown. The purpose of this study was to examine the associations of accelerometer-derived light-intensity (split into low and high) physical activity, and moderate- to vigorous-intensity physical activity with cardiometabolic biomarkers in a large population-based sample.
Methods:The study is based on 1,731 adolescents, aged 12-19 years from the 2003/04 and 2005/06 National Health and Nutrition Examination Survey. Low light-intensity activity (100-799 counts/min), high light-intensity activity (800 counts/min to <4 METs) and moderate- to vigorous-intensity activity (≥4 METs, Freedson age-specific equation) were accelerometer-derived. Cardiometabolic biomarkers, including waist circumference, systolic blood pressure, diastolic blood pressure, HDL-cholesterol, and C-reactive protein were measured. Triglycerides, LDL- cholesterol, insulin, glucose, and homeostatic model assessments of β-cell function (HOMA-%B) and insulin sensitivity (HOMA-%S) were also measured in a fasting sub-sample (n = 807).
Adjusted for confounders, each additional hour/day of low light-intensity activity was associated with 0.59 (95% CI: 1.18-0.01) mmHG lower diastolic blood pressure. Each additional hour/day of high light-intensity activity was associated with 1.67 (2.94-0.39) mmHG lower diastolic blood pressure and 0.04 (0.001-0.07) mmol/L higher HDL-cholesterol. Each additional hour/day of moderate- to vigorous-intensity activity was associated with 3.54 (5.73-1.35) mmHG lower systolic blood pressure, 5.49 (1.11-9.77)% lower waist circumference, 25.87 (6.08-49.34)% lower insulin, and 16.18 (4.92-28.53)% higher HOMA-%S.
Conclusions:Time spent in low light-intensity physical activity and high light-intensity physical activity had some favorable associations with biomarkers. Consistent with current physical activity recommendations for adolescents, moderate- to vigorous-intensity activity had favorable associations with many cardiometabolic biomarkers. While increasing MVPA should still be a public health priority, further studies are needed to identify dose-response relationships for light-intensity activity thresholds to inform future recommendations and interventions for adolescents.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Public Health Publications
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Citation counts: TR Web of Science Citation Count  Cited 40 times in Thomson Reuters Web of Science Article | Citations
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