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Vitamin D Status and Muscle Function

NCT ID: NCT02858882

Last Updated: 2016-10-27

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

29 participants

Study Classification

OBSERVATIONAL

Study Start Date

2007-02-28

Study Completion Date

2007-04-30

Brief Summary

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People living at Northern latitudes are at risk of suffering from vitamin D insufficiency due to low sun exposure and the risk may be even more pronounced among elite swimmers since indoor training further reduces sun exposure. In light of this, the investigators want to examine vitamin D status in young elite swimmers and if there is an association between vitamin D status and muscle strength.

Detailed Description

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To examine vitamin D status in young elite swimmers and if there is an 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 included to the trial conducted in March-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.

Conditions

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Vitamin D Status Muscle Function

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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Swimmers

Screening of elite athletes

Screening

Intervention Type OTHER

Screening of elite swimmers

Interventions

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Screening

Screening of elite swimmers

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

Age: 16-35 years

Top atlets, conducting:

* Hard physical activity
* Indoor elitesport min. 10 hours a week
* Healthy, without use of any medications
* Eat fish max 2 times per week

Exclusion Criteria

* Use of corticosteroids
* Illness
* Use of supplements
* Use of solarium
* Donation of blood within the last 3 months
* Having spent time below the latitude of 42° north from September through April
Minimum Eligible Age

16 Years

Maximum Eligible Age

35 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Team Denmark

OTHER

Sponsor Role collaborator

Hvidovre University Hospital

OTHER

Sponsor Role collaborator

Danmarks Fødevareforskning

UNKNOWN

Sponsor Role collaborator

Bispebjerg Hospital

OTHER

Sponsor Role collaborator

University of Copenhagen

OTHER

Sponsor Role lead

Responsible Party

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Arne Astrup

Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Other Identifiers

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KF01322182

Identifier Type: -

Identifier Source: org_study_id