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Title: Exercise energy expenditure and postprandial lipemia in girls
Authors: Tolfrey, Keith
Engstrom, Alex
Murphy, Caoileann
Thackray, Alice E.
Weaver, Robert
Barrett, Laura A.
Keywords: Adolescent
Triacylglycerol Concentration
Issue Date: 2014
Publisher: © American College of Sports Medicine
Citation: TOLFREY, K. ...et al., 2014. Exercise energy expenditure and postprandial lipemia in girls. Medicine and Science in Sports and Exercise, 46(2), pp. 239-246.
Abstract: Purpose: This study aimed to examine the effect of 30 and 60 min of moderate-intensity treadmill walking on postprandial triacylglycerol concentrations ([TAG]) in healthy girls. Methods: Eighteen 10- to 14-yr-old girls (mean ± SD; body mass = 48 ± 11 kg, body fat = 19.0 T 4.6%, peak oxygen uptake [VO2] = 47 ± 6 mL·kg -1min-1) completed three 2-d trials in a counterbalanced crossover design, each separated by 14 d. On day 1, they rested (CON) or completed 30 min (EX30) or 60 min (EX60) of intermittent treadmill exercise at 56% peak VO2, inducing energy expenditures of 777 and 1536 kJ (186 and 367 kcal), respectively. On day 2, after a 12-h fast, a capillary blood sample was taken for fasting [TAG] before a high-fat milkshake (80 kJ·kg-1 body mass) was consumed. Further blood samples were taken hourly over a 6-h postprandial rest period for [TAG]. ANOVA and Student's t-tests were used to analyze the data. Results: Fasting [TAG] was lower in EX60 than CON (95% confidence interval [CI] = -0.36 to 0.04, effect size (ES) = 0.41) and EX30 (95% CI = -0.47 to 0.04, ES = 0.46); all group mean concentrations were low (≤0.90 mmol·L-1). The main effect for condition revealed differences in postprandial [TAG] over time (ES = 0.36). The EX60 total area under the [TAG] versus time curve was lower than CON (95% CI = -2.66 to -0.04, ES 0.40) and EX30 (95%CI = -2.11 to 0.15, ES = 0.30); CON and EX30 were similar (95%CI = -1.44 to 0.71, ES = 0.10). Conclusion: This study demonstrates that 60 min but not 30 min of moderate treadmill exercise, with a gross energy expenditure of 1536 kJ (367 kcal), attenuated postprandial [TAG] in girls. Copyright © 2013 by the American College of Sports Medicine.
Description: This is a non-final version of an article published in final form in TOLFREY, K. ...et al., 2014. Exercise energy expenditure and postprandial lipemia in girls. Medicine and Science in Sports and Exercise, 46(2), pp. 239-246.
Version: Accepted for publication
DOI: 10.1249/MSS.0b013e3182a59ab1
URI: https://dspace.lboro.ac.uk/2134/19440
Publisher Link: http://dx.doi.org/10.1249/MSS.0b013e3182a59ab1
ISSN: 0195-9131
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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