Vitamin D status and muscle function among adolescent and young swimmers
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Vitamin D status and muscle function among adolescent and young swimmers. / Geiker, Nina Rica Wium; Larsen, Rikke; Hansen, Mette; Jørgensen, Niklas R; Jakobsen, Jette; Hansen, Birthe S; Kristensen, Michael; Bügel, Susanne Gjedsted.
In: International Journal of Sport Nutrition & Exercise Metabolism, Vol. 27, No. 5, 2017, p. 399-407.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Vitamin D status and muscle function among adolescent and young swimmers
AU - Geiker, Nina Rica Wium
AU - Larsen, Rikke
AU - Hansen, Mette
AU - Jørgensen, Niklas R
AU - Jakobsen, Jette
AU - Hansen, Birthe S
AU - Kristensen, Michael
AU - Bügel, Susanne Gjedsted
N1 - CURIS 2017 NEXS 303
PY - 2017
Y1 - 2017
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 of 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 analysed 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= 0.026). 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 = 0.02). 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 of 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 analysed 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= 0.026). 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 = 0.02). 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 - 25-hydroxyvitamin D
KW - Muscle strength
KW - Athletes
U2 - 10.1123/ijsnem.2016-0248
DO - 10.1123/ijsnem.2016-0248
M3 - Journal article
C2 - 28556690
VL - 27
SP - 399
EP - 407
JO - International Journal of Sport Nutrition & Exercise Metabolism
JF - International Journal of Sport Nutrition & Exercise Metabolism
SN - 1526-484X
IS - 5
ER -
ID: 180507658