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Water Consumption during a School Day and Children’s Short-Term Cognitive Performance: The CogniDROP Randomized Intervention Trial

1
Research Department of Child Nutrition, University Children’s Hospital, Ruhr University Bochum, 44791 Bochum, Germany
2
Institute for Work, Learning and Ageing (ALA), 44805 Bochum, Germany
3
Department of Sports Medicine and Sports Nutrition, Ruhr University Bochum, 44801 Bochum, Germany
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(5), 1297; https://doi.org/10.3390/nu12051297
Received: 16 April 2020 / Revised: 28 April 2020 / Accepted: 29 April 2020 / Published: 2 May 2020
There is still little research examining the relationship between water consumption in school and specific cognitive performance. The aim of this cluster-randomized intervention CogniDROP trial was to investigate the short-term effects of drinking water during the morning on executive functions. The participants were from the 5th and 6th grade of a comprehensive school in Germany (14 classes, n = 250, 61.6% boys). The classes were randomly divided into an intervention group (an education on healthy drinking behavior and a promotion of water consumption) and a control group. A battery of computerized tasks (Switch Task, 2-Back Task, Corsi Block-Tapping Task and Flanker Task) was used to test executive functions. Urine color and thirst were evaluated to check the hydration level. Physical activity over the past 24 h was measured using GT3X ActiGraph. A non-linear relationship was observed between the amount of drinking water and executive performance. Consuming water up to 1000 mL (or up to 50% of Total Water Intake) had benefits during memory tasks. Urine color and number of steps on the study day correlated with water consumed. The results suggest that a water-friendly environment supports school-aged children in adequate water intake resulting in better cognitive performance, especially short-term memory. View Full-Text
Keywords: cognition; executive function; hydration; school children cognition; executive function; hydration; school children
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Drozdowska, A.; Falkenstein, M.; Jendrusch, G.; Platen, P.; Luecke, T.; Kersting, M.; Jansen, K. Water Consumption during a School Day and Children’s Short-Term Cognitive Performance: The CogniDROP Randomized Intervention Trial. Nutrients 2020, 12, 1297.

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