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J Sports Sci. 2015;33(8):806-16. doi: 10.1080/02640414.2014.964749. Epub 2014 Oct 30.

Effect of repeated sprints on postprandial endothelial function and triacylglycerol concentrations in adolescent boys.

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1
a School of Sport, Exercise and Health Sciences , Loughborough University , Loughborough , UK.

Abstract

This study investigated whether repeated, very short duration sprints influenced endothelial function (indicated by flow-mediated dilation) and triacylglycerol concentrations following the ingestion of high-fat meals in adolescent boys. Nine adolescent boys completed two, 2-day main trials (control and exercise), in a counter-balanced, cross-over design. Participants were inactive on day 1 of the control trial but completed 40 × 6 s maximal cycle sprints on day 1 of the exercise trial. On day 2, capillary blood samples were collected and flow-mediated dilation measured prior to, and following, ingestion of a high-fat breakfast and lunch. Fasting flow-mediated dilation and plasma triacylglycerol concentration were similar in the control and exercise trial (P > 0.05). In the control trial, flow-mediated dilation was reduced by 20% and 27% following the high-fat breakfast and lunch; following exercise these reductions were negated (main effect trial, P < 0.05; interaction effect trial × time, P < 0.05). The total area under the plasma triacylglycerol concentration versus time curve was 13% lower on day 2 in the exercise trial compared to the control trial (8.65 (0.97) vs. 9.92 (1.16) mmol · l(-1) · 6.5 h, P < 0.05). These results demonstrate that repeated 6 s maximal cycle sprints can have beneficial effects on postprandial endothelial function and triacylglycerol concentrations in adolescent boys.

KEYWORDS:

coronary heart disease risk; flow-mediated dilation; high-intensity exercise; postprandial lipaemia; repeated sprint exercise

PMID:
25357120
DOI:
10.1080/02640414.2014.964749
[Indexed for MEDLINE]

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