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dc.contributor.authorAfeef, Sahar M.O.
dc.contributor.authorBarrett, Laura A.
dc.contributor.authorZakrzewski-Fruer, Julia K.
dc.contributor.authorTolfrey, Keith
dc.date.accessioned2022-08-17T09:58:01Z
dc.date.available2022-08-15T00:00:00Z
dc.date.available2022-08-17T09:58:01Z
dc.date.issued2022-08-15
dc.identifier.citationAfeef SM, Barrett LA, Zakrzewski-Fruer JK, Tolfrey K (2022) 'Postprandial glucose responses to standardised meals consumed after moderate- and high-intensity exercise bouts across standard school days in healthy adolescents', Recent Progress in Nutrition, 2 (3)en_US
dc.identifier.issn2771-9871
dc.identifier.doi10.21926/rpn.2203020
dc.identifier.urihttp://hdl.handle.net/10547/625509
dc.description.abstractExercise-induced moderation of postprandial glycaemia in adolescents is unclear and has not been examined under free-living conditions. We assessed the effect of moderate-intensity exercise (MIE) and high-intensity intermittent exercise (HIIE) bouts on subsequent postprandial glycaemic responses across three standard school days. Fourteen healthy adolescents (13 ± 1 years) completed three conditions in the following order across consecutive days: MIE, 30-min continuous brisk walking; CON, no-exercise control; HIIE, 30- min of 10 × 30-s sprints interspersed with 2.5-min brisk walking bouts. Participants consumed three standardised meals (breakfast, lunch and dinner) at standardised times. Interstitial glucose, energy intake, sedentary time and physical activity were assessed under free-living conditions. Linear mixed models compared glucose outcomes between conditions, and Cohen’s d effect sizes were calculated. Although non-significant, the reduction in postbreakfast glucose iAUC was moderate for MIE (-0.24 mmol·L -1 ; P = 0.59; d = 0.77) and large for HIIE (-0.26 mmol·L -1 ; P = 0.44; d = 0.86) compared with CON. Non-significant, moderate (0.37 mmol·L -1 ; P = 0.22; d = 0.70) and large (0.42 mmol·L -1 ; P = 0.20; d = 0.81) increases in postlunch glucose iAUC were observed for MIE and HIIE compared with CON. Nevertheless, the 24-h mean glucose was stable at ~5.4 mmol·L -1 across conditions. The glycaemic variability indices calculated over 24-h after the onset of exercise for each condition including standard deviation (P = 0.59) and mean amplitude of glycaemic excursion (P = 0.82) were not different between conditions. Thirty-minute bouts of MIE and HIIE did not change postprandial glycaemia or 24-h glycaemic variability significantly in the small sample of healthy adolescents. However, the moderate and large effect sizes suggest both MIE and HIIE reduced breakfast glucose iAUC compared with CON, yet led to increases in post-lunch iAUC in the two exercise conditions. The mismatch between the probability values and effect sizes was a consequence of our COVID-reduced sample. The ramifications of these exercise effects are unclear and need to be confirmed in a larger sample of adolescents.en_US
dc.description.sponsorshipThis research was funded by King Abdulaziz University, Jeddah, Saudi Arabia, through a PhD scholarship to Ms Sahar M Afeef.en_US
dc.language.isoenen_US
dc.publisherLidsen Publishingen_US
dc.relation.urlhttps://www.lidsen.com/journals/rpn/rpn-02-03-020en_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectphysical activityen_US
dc.subjectexerciseen_US
dc.subjectadolescentsen_US
dc.subjecthealth outcomesen_US
dc.subjectSubject Categories::C600 Sports Scienceen_US
dc.titlePostprandial glucose responses to standardised meals consumed after moderate- and high-intensity exercise bouts across standard school days in healthy adolescentsen_US
dc.typeArticleen_US
dc.contributor.departmentLoughborough Universityen_US
dc.contributor.departmentKing Abdulaziz Universityen_US
dc.contributor.departmentUniversity of Bedfordshireen_US
dc.identifier.journalRecent Progress in Nutritionen_US
dc.date.updated2022-08-17T09:52:57Z
dc.description.notejournal is gold oa http://lidsen.com/policies/open-access "We publish all LIDSEN journals under the Creative Commons Attribution (CC BY 4.0) License, unless otherwise noted"


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