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Vitamin D Status and Muscle Function Among Adolescent and Young Swimmers

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Geiker, Nina Rica Wium ; Hansen, Mette ; Jakobsen, Jette ; Kristensen, Michael ; Larsen, Rikke ; Jørgensen, Niklas R ; Hansen, Birthe S ; Bügel, Susanne. / Vitamin D Status and Muscle Function Among Adolescent and Young Swimmers. I: International Journal of Sport Nutrition and Exercise Metabolism. 2017 ; Bind 27, Nr. 5. s. 399-407.

Bibtex

@article{6082ef9cf9be446d90487e05eda41024,
title = "Vitamin D Status and Muscle Function Among Adolescent and Young Swimmers",
abstract = "Impaired muscle function has been coupled to vitamin D insufficiency in young women and in elderly men and women. Those living at Northern latitudes are at risk for vitamin D insufficiency due to low sun exposure which may be more pronounced among elite swimmers because of their indoor training schedules. We aimed to examine vitamin D status among young elite swimmers and evaluate the association between vitamin D status and muscle strength. Twenty-nine swimmers, 12 female and 17 male (16-24 years) residing at latitude 55-56°N were studied in March and April. Blood samples were analyzed for serum 25-hydroxyvitamin D (s-25(OH)D) and hand-grip strength was measured as marker of muscle strength. Subjects´ vitamin D and calcium intake were assessed by food frequency questionnaire and sun exposure and training status by questionnaires. Mean (± SD) s-25(OH)D was 52.6 ± 18.3nmol/L among all swimmers. In 45{\%} of the swimmers s-25(OH)D was below 50 nmol/L. Female swimmers had higher s-25(OH)D concentration than male swimmers (61.7 ± 17,5 nmol/L vs. 46.2 ± 16,5 nmol/L, p = .026). Among male swimmers, those with sufficient vitamin D status had higher hand grip strength than those with insufficient vitamin D status (50.6 ± 6.4 kg vs. 41.1 ± 7.8 kg, p = .02). Among Danish elite swimmers 45{\%} had an insufficient vitamin D status during the spring; the prevalence being higher among male swimmers. Muscle strength was significantly higher in male swimmers with sufficient vitamin D status.",
keywords = "Journal Article",
author = "Geiker, {Nina Rica Wium} and Mette Hansen and Jette Jakobsen and Michael Kristensen and Rikke Larsen and J{\o}rgensen, {Niklas R} and Hansen, {Birthe S} and Susanne B{\"u}gel",
year = "2017",
month = "10",
doi = "10.1123/ijsnem.2016-0248",
language = "English",
volume = "27",
pages = "399--407",
journal = "International Journal of Sport Nutrition and Exercise Metabolism",
issn = "1526-484X",
publisher = "Human Kinetics",
number = "5",

}

RIS

TY - JOUR

T1 - Vitamin D Status and Muscle Function Among Adolescent and Young Swimmers

AU - Geiker, Nina Rica Wium

AU - Hansen, Mette

AU - Jakobsen, Jette

AU - Kristensen, Michael

AU - Larsen, Rikke

AU - Jørgensen, Niklas R

AU - Hansen, Birthe S

AU - Bügel, Susanne

PY - 2017/10

Y1 - 2017/10

N2 - Impaired muscle function has been coupled to vitamin D insufficiency in young women and in elderly men and women. Those living at Northern latitudes are at risk for vitamin D insufficiency due to low sun exposure which may be more pronounced among elite swimmers because of their indoor training schedules. We aimed to examine vitamin D status among young elite swimmers and evaluate the association between vitamin D status and muscle strength. Twenty-nine swimmers, 12 female and 17 male (16-24 years) residing at latitude 55-56°N were studied in March and April. Blood samples were analyzed for serum 25-hydroxyvitamin D (s-25(OH)D) and hand-grip strength was measured as marker of muscle strength. Subjects´ vitamin D and calcium intake were assessed by food frequency questionnaire and sun exposure and training status by questionnaires. Mean (± SD) s-25(OH)D was 52.6 ± 18.3nmol/L among all swimmers. In 45% of the swimmers s-25(OH)D was below 50 nmol/L. Female swimmers had higher s-25(OH)D concentration than male swimmers (61.7 ± 17,5 nmol/L vs. 46.2 ± 16,5 nmol/L, p = .026). Among male swimmers, those with sufficient vitamin D status had higher hand grip strength than those with insufficient vitamin D status (50.6 ± 6.4 kg vs. 41.1 ± 7.8 kg, p = .02). Among Danish elite swimmers 45% had an insufficient vitamin D status during the spring; the prevalence being higher among male swimmers. Muscle strength was significantly higher in male swimmers with sufficient vitamin D status.

AB - Impaired muscle function has been coupled to vitamin D insufficiency in young women and in elderly men and women. Those living at Northern latitudes are at risk for vitamin D insufficiency due to low sun exposure which may be more pronounced among elite swimmers because of their indoor training schedules. We aimed to examine vitamin D status among young elite swimmers and evaluate the association between vitamin D status and muscle strength. Twenty-nine swimmers, 12 female and 17 male (16-24 years) residing at latitude 55-56°N were studied in March and April. Blood samples were analyzed for serum 25-hydroxyvitamin D (s-25(OH)D) and hand-grip strength was measured as marker of muscle strength. Subjects´ vitamin D and calcium intake were assessed by food frequency questionnaire and sun exposure and training status by questionnaires. Mean (± SD) s-25(OH)D was 52.6 ± 18.3nmol/L among all swimmers. In 45% of the swimmers s-25(OH)D was below 50 nmol/L. Female swimmers had higher s-25(OH)D concentration than male swimmers (61.7 ± 17,5 nmol/L vs. 46.2 ± 16,5 nmol/L, p = .026). Among male swimmers, those with sufficient vitamin D status had higher hand grip strength than those with insufficient vitamin D status (50.6 ± 6.4 kg vs. 41.1 ± 7.8 kg, p = .02). Among Danish elite swimmers 45% had an insufficient vitamin D status during the spring; the prevalence being higher among male swimmers. Muscle strength was significantly higher in male swimmers with sufficient vitamin D status.

KW - Journal Article

U2 - 10.1123/ijsnem.2016-0248

DO - 10.1123/ijsnem.2016-0248

M3 - Journal article

VL - 27

SP - 399

EP - 407

JO - International Journal of Sport Nutrition and Exercise Metabolism

JF - International Journal of Sport Nutrition and Exercise Metabolism

SN - 1526-484X

IS - 5

ER -

ID: 52120540