Sex differences in postprandial lipaemia after acute high-intensity interval running in young people
journal contributionposted on 2017-11-06, 14:04 authored by Alice ThackrayAlice Thackray, Laura BarrettLaura Barrett, Keith TolfreyKeith Tolfrey
Acute exercise reduces postprandial triacylglycerol concentrations ([TAG]) in boys and girls; however, it is not known whether between-sex differences exist in response to exercise. Fifteen boys (mean(SD): 11.8(0.4) years) and sixteen girls (12.1(0.7) years) completed two, 2-day conditions. On day 1, participants rested (CON) or completed 10×1 min high-intensity interval runs at 100% maximal aerobic speed with 1 min recovery (HIIR). On day 2, participants consumed a standardised breakfast and lunch over a 6.5-h period during which seven capillary blood samples were collected. Based on ratios of the geometric means (95% CI for ratios), fasting [TAG] was 32% lower in boys than girls (-44 to -18%, ES=1.31, P<0.001), and 12% lower after HIIR than CON (-18 to -5%, ES=0.42, P=0.003); the magnitude of reduction was not significantly different between the sexes (8% (ES=0.36) vs. 15% (ES=0.47), respectively; P=0.29). The total area under the [TAG] versus time curve was 27% lower in boys than girls (-40 to -10%, ES=1.02, P=0.005), and 10% lower after HIIR than CON (-16 to -5%, ES=0.36, P=0.001); the magnitude of reduction was similar between the sexes (11% (ES=0.43) vs. 10% (ES=0.31), respectively; P=0.87). The small-moderate reduction in postprandial [TAG] after HIIR was similar between the sexes.
The research was supported by the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre.
- Sport, Exercise and Health Sciences
Published inJournal of Sports Sciences
CitationTHRACKRAY, A.E., BARRETT, L.A. and TILFREY, K., 2017. Sex differences in postprandial lipaemia after acute high-intensity interval running in young people. Journal of Sports Sciences, 36(15), pp. 1673-1681.
PublisherTaylor & Francis
- AM (Accepted Manuscript)
Publisher statementThis work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/
NotesThis is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Sports Sciences on 24 Nov 2017, available online: https://doi.org/10.1080/02640414.2017.1409610