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Vitamin D Supplementation and Physical Activity of Young Soccer Players during High-Intensity Training


Skalska, Maria; Nikolaidis, Pantelis Theo; Knechtle, Beat; Rosemann, Thomas Johannes; Radzimiński, Łukasz; Jastrzębska, Joanna; Kaczmarczyk, Mariusz; Myśliwiec, Artur; Dragos, Paul; López-Sánchez, Guillermo F; Jastrzębski, Zbigniew (2019). Vitamin D Supplementation and Physical Activity of Young Soccer Players during High-Intensity Training. Nutrients, 11(2):349.

Abstract

The aim of this study was to confirm that vitamin D supplementation of young soccer players during eight-week high-intensity training would have a significant effect on their motion activity. The subjects were divided into two groups: the experimental one, which was supplemented with vitamin D (SG, = 20), and the placebo group (PG, = 16), which was not supplemented with vitamin D. All the players were subjected to the same soccer training, described as High-Intensity Interval Training (HIIT). The data of the vitamin D status, time motion parameters and heart rate were collected just before and after the intervention. A significant increase in 25(OH)D concentration (119%) was observed in the supplemented group, while the non-supplemented group showed a decrease of 8.4%. Based on the obtained results, it was found that physical activity indicators in the players were significantly improved during small-sided games at the last stage of the experiment. However, taking into account the effect of supplementation with vitamin D, there were no statistically significant differences between the placebo and the supplemented groups; thus, the effect size of the conducted experiment was trivial.

Abstract

The aim of this study was to confirm that vitamin D supplementation of young soccer players during eight-week high-intensity training would have a significant effect on their motion activity. The subjects were divided into two groups: the experimental one, which was supplemented with vitamin D (SG, = 20), and the placebo group (PG, = 16), which was not supplemented with vitamin D. All the players were subjected to the same soccer training, described as High-Intensity Interval Training (HIIT). The data of the vitamin D status, time motion parameters and heart rate were collected just before and after the intervention. A significant increase in 25(OH)D concentration (119%) was observed in the supplemented group, while the non-supplemented group showed a decrease of 8.4%. Based on the obtained results, it was found that physical activity indicators in the players were significantly improved during small-sided games at the last stage of the experiment. However, taking into account the effect of supplementation with vitamin D, there were no statistically significant differences between the placebo and the supplemented groups; thus, the effect size of the conducted experiment was trivial.

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Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of General Practice
Dewey Decimal Classification:610 Medicine & health
Scopus Subject Areas:Life Sciences > Food Science
Health Sciences > Nutrition and Dietetics
Language:English
Date:6 February 2019
Deposited On:12 Jun 2019 14:52
Last Modified:15 Apr 2020 23:46
Publisher:MDPI Publishing
ISSN:2072-6643
OA Status:Gold
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.3390/nu11020349
PubMed ID:30736376

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