Acute Exercise and Postprandial Lipemia in Young People

Abstract

Exaggerated postprandial triacylglycerol concentrations ([TAG]

Exercise intensity and postprandial health outcomes in adolescents

“…There is consistent evidence showing that performing 30-60 min of moderate to vigorous exercise (50-75% ̇O 2 peak ) ~ 12-16 h before a HFM can reduce PPL in healthy adolescents (Tolfrey et al 2014). Furthermore, an acute bout of low volume HIIE running performed 15.5 h before a HFM can reduce TAUC-TAG (~11%, ES=0.50) and IAUC-TAG (~15%, ES=0.39) over a 6.5 h postprandial period in healthy 11-12 y old boys ).…”

“…Thirdly, PPL in adolescents is known to be influenced by exercise performed up to 16 h before the HFM (Tolfrey et al 2014). While we are not able to provide objective measurements of our participants' physical activity, all participants were asked not to undertake formal exercise 48 h before each laboratory visit.…”

“…It is known that 60 min of intermittent or continuous exercise at a moderate to vigorous intensity (50-75% ̇O 2 peak ) can reduce PPL by ~ 20-30% in male and female adolescents Tolfrey et al 2008;Tolfrey et al 2013). Furthermore, 30 min of moderate exercise (<1 MJ) was similarly effective at reducing PPL as 60 min in 13 year old boys , indicating that even a small volume of exercise may have a beneficial effect on PPL.…”

“…Homogeneity of variance was determined using Mauchly's test of sphericity and the degrees of freedom were adjusted using the Greenhouse-Geisser correction if required. To facilitate comparison with recent studies examining exercise and PPL in adolescents Tolfrey et al 2013) pairwise comparisons between means were interpreted using the P value, 95% confidence intervals (CI) and standardised effect sizes (ES) (Cohen 1988;Hopkins et al 2009). The null hypothesis was rejected at an alpha level of 0.05, and an ES of 0.20 was considered to be a small change between means, with 0.50 and 0.80 interpreted as a moderate and large change respectively (Cohen 1988).…”

Energy replacement diminishes the effect of exercise on postprandial lipemia in boys

“…Previous research highlights the potency of acute moderate-to vigorous-intensity exercise interventions completed up to 18 h before a standardised meal to reduce postprandial [TAG] in adults [6] and young people [7]. Furthermore, acute exercise has been shown to increase resting fat oxidation in the postprandial period in adults [8,9].…”