The Effects of Vitamin D Supplementation on Aerobic Fitness in Athletes
NCT ID: NCT02278172
Last Updated: 2016-05-25
Study Results
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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COMPLETED
PHASE4
44 participants
INTERVENTIONAL
2014-10-31
2015-04-30
Brief Summary
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Secondary aims are to determine if vitamin D3 supplementation impacts on measures of muscle function, lung function, body composition, immune function and the self-reported incidence of upper respiratory tract infection.
This double-blind, randomised, placebo-controlled trial is of parallel design and will aim to recruit a total of 50 athletes randomised into either a placebo or treatment group for a 12-week intervention.
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Detailed Description
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Conditions
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Study Design
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RANDOMIZED
PARALLEL
BASIC_SCIENCE
TRIPLE
Study Groups
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Vitamin D3 3000IU (75μg)
Treatment solution delivered via oral spray once daily for 12-weeks
Vitamin D
3000IU (75 μg) vitamin D in a commercially available oral spray solution
Placebo
Placebo solution delivered via oral spray once daily for 12-weeks
Placebo
Placebo oral spray solution manufactured to mimic the vitamin D oral spray
Interventions
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Vitamin D
3000IU (75 μg) vitamin D in a commercially available oral spray solution
Placebo
Placebo oral spray solution manufactured to mimic the vitamin D oral spray
Other Intervention Names
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Eligibility Criteria
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Inclusion Criteria
* Apparently healthy
* Over the age of 18
Exclusion Criteria
* Individuals who are not an athlete at a University/local sports team
* Athletes who predominantly utilise anaerobic energy systems
* Athletes under the age of 18
* Those that have consumed a supplement containing vitamin D (greater than 400IU/day) or iron supplements for up to 30 days prior to starting the study
* Those with health conditions identified by the screening questionnaire
* Individuals that are on prescribed medication that is known to affect vitamin D metabolism
* Those following a vegan diet
* Those with a physical disability that would prevent successful completion of the exercise test
* Those who have either had a sun holiday in the 4 weeks prior to starting the study
* Those planning a sun holiday during the intervention period
18 Years
ALL
Yes
Sponsors
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Northern Ireland Executive
UNKNOWN
University of Ulster
OTHER
Responsible Party
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Dr Pamela Magee
Dr Pamela Magee
Principal Investigators
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Pamela J Magee, PhD
Role: PRINCIPAL_INVESTIGATOR
University of Ulster
Locations
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Human Intervention Studies Unit (HISU), University of Ulster
Coleraine, Londonderry, United Kingdom
Countries
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Other Identifiers
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REC14.0087
Identifier Type: -
Identifier Source: org_study_id
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