NCT02858882

Brief Summary

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.

Trial Health

100
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
29

participants targeted

Target at below P25 for all trials

Timeline
Completed

Started Feb 2007

Shorter than P25 for all trials

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

February 1, 2007

Completed
2 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 1, 2007

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

April 1, 2007

Completed
9.3 years until next milestone

First Submitted

Initial submission to the registry

July 27, 2016

Completed
12 days until next milestone

First Posted

Study publicly available on registry

August 8, 2016

Completed
Last Updated

October 27, 2016

Status Verified

October 1, 2016

Enrollment Period

2 months

First QC Date

July 27, 2016

Last Update Submit

October 26, 2016

Conditions

Vitamin D StatusMuscle Function

Outcome Measures

Primary Outcomes (1)

  • Serum 25-hydroxyvitamin D (s-25(OH)D)

    2 months

Secondary Outcomes (2)

  • Food frequency questionnaire

    One week

  • Hand-grip strength

    2 months

Study Arms (1)

Swimmers

Screening of elite athletes

Other: Screening

Interventions

ScreeningOTHER

Screening of elite swimmers

Swimmers

Eligibility Criteria

Age16 Years - 35 Years
Sexall
Healthy VolunteersYes
Age GroupsChild (0-17), Adult (18-64)

You may qualify if:

  • 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

You may not qualify if:

  • 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

Contact the study team to confirm eligibility.

Sponsors & Collaborators

MeSH Terms

Interventions

Mass Screening

Intervention Hierarchy (Ancestors)

Diagnostic Techniques and ProceduresDiagnosisHealth SurveysSurveys and QuestionnairesData CollectionEpidemiologic MethodsInvestigative TechniquesDiagnostic ServicesPreventive Health ServicesHealth ServicesHealth Care Facilities Workforce and ServicesHealth Care Evaluation MechanismsQuality of Health CareHealth Care Quality, Access, and EvaluationPublic HealthEnvironment and Public HealthPublic Health Practice

Study Design

Study Type
observational
Observational Model
COHORT
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Professor

Study Record Dates

First Submitted

July 27, 2016

First Posted

August 8, 2016

Study Start

February 1, 2007

Primary Completion

April 1, 2007

Study Completion

April 1, 2007

Last Updated

October 27, 2016

Record last verified: 2016-10

Data Sharing

IPD Sharing
Will not share