Gymnastik- och idrottshögskolan, GIH

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Acute effects of nitrate and breakfast on working memory and cerebral blood flow in adolescents: a randomized crossover trial
Swedish School of Sport and Health Sciences, GIH, Department of Physical Activity and Health. (Fysisk aktivitet och hjärnhälsa)ORCID iD: 0000-0001-7175-0093
Swedish School of Sport and Health Sciences, GIH, Department of Physical Activity and Health. (Fysisk aktivitet och hjärnhälsa)ORCID iD: 0000-0002-8079-0596
Swedish School of Sport and Health Sciences, GIH, Department of Physiology, Nutrition and Biomechanics. (Fysisk aktivitet och hjärnhälsa)ORCID iD: 0000-0002-7456-8606
Swedish School of Sport and Health Sciences, GIH, Department of Physical Activity and Health. (Fysisk aktivitet och hjärnhälsa)ORCID iD: 0000-0003-0004-8533
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2023 (English)Conference paper, Oral presentation with published abstract (Other academic)
Abstract [en]

Purpose: Beneficial acute effects of dietary nitrate have been demonstrated on working memory in adults, with changes in cerebral blood flow (CBF) being a potential mechanism. However, these effects have not been studied in adolescents. Moreover, having breakfast compared to skipping may also exhibit positive effects on working memory. Therefore, this randomized crossover trial investigated the acute effects of nitrate and breakfast on working memory and changes in task-related CBF in adolescents.  Methods: This trial will recruit at least 43 adolescents (13–15 years old). There were three experimental breakfast conditions: (1) none, (2) regular, and (3) regular breakfast with high nitrate in the form of concentrated beetroot juice. Working memory (1-, 2-, 3-back tests) and task-related CBF (prefrontal cortex oxygenated and deoxygenated-hemoglobin changes estimated using functional near-infrared spectroscopy) were measured immediately after breakfast and 130 min later. The data collection for this study is ongoing, thus results for 35 adolescents are presented here and due to blinding of the researcher we are unable to report at this time in which condition these effects occurred, but will be revealed by the time of the conference, as well as for the results on changes in CBF.  Results: Preliminary results from the ongoing study showed that from pretest to posttest there was a statistically significant improvement in reaction time in all three conditions for all three n-back tests, but no intervention effects. Accuracy, however, improved from pretest to posttest in only one condition, for all three nback tests (β [95% confidence interval] from linear mixed-effects models with subject as random effect: 1-back 2.8[1.2-4.3], 2-back 2.6[0.9-4.2], 3-back 3.6[2.2-5.0]), and there was a tendency towards an intervention effect between this breakfast condition and another on the accuracy of the 3-back test (P for time-by-condition interaction 0.07).   Conclusions: The results from this study will increase our understanding into the effects of breakfast and its composition (i.e., nitrate-rich) on acutely improving working memory in adolescents and the potential mechanisms. In turn, the results will inform on whether policies on providing breakfast in schools should be considered to improve students' cognitive performance.

Place, publisher, year, edition, pages
2023.
Keywords [sv]
E-PABS, EPABS, hjärnhälsa, brain health
National Category
Nutrition and Dietetics
Research subject
Medicine/Technology; Medicine/Technology
Identifiers
URN: urn:nbn:se:gih:diva-7794OAI: oai:DiVA.org:gih-7794DiVA, id: diva2:1797662
Conference
The International Society of Behavioral Nutrition and Physical Activity (ISBNPA), Uppsala, Sweden, June 15-18, 2023
Part of project
E-PABS - a centre of Excellence in Physical Activity, healthy Brain functions and Sustainability, Knowledge FoundationPhysical Activity for Healthy Brain Functions in School Youth, Knowledge Foundation, Skandias Stiftelse Idéer för livet
Funder
Knowledge FoundationSkandias Stiftelse Idéer för livet
Note

Partners are: IKEA, Kronprinsessparets stiftelse/Generation Pep, Skanska, Coop, KFS

Available from: 2023-09-15 Created: 2023-09-15 Last updated: 2024-03-21Bibliographically approved

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Heiland, Emerald G.Kjellenberg, KarinTarassova, OlgaNyberg, GiselaEkblom, MariaEkblom, ÖrjanHelgadóttir, Björg

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Heiland, Emerald G.Kjellenberg, KarinTarassova, OlgaNyberg, GiselaEkblom, MariaEkblom, ÖrjanHelgadóttir, Björg
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Department of Physical Activity and HealthDepartment of Physiology, Nutrition and Biomechanics
Nutrition and Dietetics

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