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The effects of time and intensity of exercise on novel and established markers of CVD in adolescent youth

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Author
Buchan, Duncan S.
Ollis, Stewart
Young, John D.
Thomas, Non E.
Cooper, Stephen-Mark
Tong, Tom K.
Nie, Jinlei
Malina, Robert M.
Baker, Julien S.
Date
2011
Type
Article
Publisher
Wiley
ISSN
1520-6300 (online)
Metadata
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Abstract
Objectives: This article examines the effects of brief, intense exercise in comparison with traditional endurance exercise on both novel and traditional markers of cardiovascular disease (CVD) in youth. Methods: Forty seven boys and ten girls (16.4 ± 0.7 years of age) were divided into a moderate (MOD), high intensity (HIT), or a control group. The MOD group (12 boys, 4 girls) and HIT group (15 boys, 2 girls) performed three weekly exercise sessions over 7 weeks. Each session consisted of either four to six repeats of maximal sprint running within a 20 m area with 20–30 s recovery (HIT) or 20 min continuous running within a 20 m area at ∼70% maximal oxygen uptake (VO2max). Results: Total exercise time commitment over the intervention was 420 min (MOD) and 63 min (HIT). Training volume was 85% lower for the HIT group. Total estimated energy expenditure was ∼907.2 kcal (HIT) and ∼4410 kcal (MOD). Significant improvements (P ≤ 0.05) were found in systolic blood pressure, aerobic fitness, and body mass index (BMI) postintervention (HIT). In the MOD group, significant (P ≤ 0.05) improvements were noted in aerobic fitness, percentage body fat (%BF), BMI, fibrinogen (Fg), plasminogen activator inhibitor-1, and insulin concentrations. Conclusions: These findings demonstrate that brief, intense exercise is a time efficient means for improving CVD risk factors in adolescents. Am. J. Hum. Biol., 2011. © 2011 Wiley-Liss, Inc.
Journal/conference proceeding
American Journal of Human Biology
Citation
Buchan, D.S., Ollis, S., Young, J.D., Thomas, N.E., Cooper, S.M., Tong, T.K., Nie, J., Malina, R.M. and Baker, J.S., 2011. The effects of time and intensity of exercise on novel and established markers of CVD in adolescent youth. American Journal of Human Biology, 23(4), pp.517-526.
URI
http://hdl.handle.net/10369/4021
DOI
http://dx.doi.org/10.1002/ajhb.21166
Description
This article was published in American Journal of Human Biology on 4 April 2011 (online), available at http://dx.doi.org/10.1002/ajhb.21166
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