Short-term effects of carbohydrates differing in glycemic index (GI) consumed at lunch on children’s cognitive function in a randomized crossover ... View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2020-03-12

AUTHORS

Kathrin Jansen, Jana Tempes, Alina Drozdowska, Maike Gutmann, Michael Falkenstein, Anette E. Buyken, Lars Libuda, Henrik Rudolf, Thomas Lücke, Mathilde Kersting

ABSTRACT

BackgroundIntervention studies suggest an influence of breakfast dietary glycemic index (GI) on children’s cognition. The Cognition Intervention Study Dortmund-GI-I study examined whether lunch dietary GI might have short-term effects on selected cognitive parameters.MethodsA randomized crossover study was performed at a comprehensive school on 2 test days. One hundred and eighty-nine participants (5th and 6th grade) were randomly assigned to one of the two sequences, medium-high GI (m-hGI) or high-medium GI (h-mGI), following block randomization. In the first period, one group received a dish containing hGI rice (GI: 86) ad libitum, the other mGI rice (GI: 62)—1 week later, in the second period, vice versa. Tonic alertness, task switching, and working memory updating were tested with a computerized test battery 45 min after beginning of lunch break. Treatment effects were estimated using the t test for normally distributed data or the Wilcoxon rank-sum test for non-normally distributed data.ResultsThe crossover approach revealed no effects of lunch dietary GI on the tested cognitive parameters in the early afternoon. However, we determined carryover effects for two parameters, and therefore analyzed only data of the first period. The reaction time of the two-back task (working memory updating) was faster (p = 0.001) and the count of commission errors in the alertness task was lower (p = 0.04) in the hGI group.ConclusionNo evidence of short-term effects of lunch dietary GI on cognition of schoolchildren was found. Potential positive effects on single parameters of working memory updating and tonic alertness favoring hGI rice need to be verified. More... »

PAGES

757-764

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41430-020-0600-0

DOI

http://dx.doi.org/10.1038/s41430-020-0600-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1125558682

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/32203229


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