Vitamin D Supplementation and Muscle Characteristics in Trained Subjects

• Register: ClinicalTrials.gov
• Last refreshed on: 16 December 2017
• Main ID: NCT02599675
• Date of registration: 05/11/2015
• Prospective Registration: No
• Primary sponsor: Inland Norway University of Applied Sciences
• Public title: Vitamin D Supplementation and Muscle Characteristics in Trained Subjects
• Scientific title: Effects of 12 Weeks of Vitamin D Supplementation on Muscle Characteristics in Trained Subjects
• Date of first enrolment: November 2015
• Target sample size: 71
• Recruitment status: Completed
• URL: https://clinicaltrials.gov/show/NCT02599675
• Study type: Interventional
• Study design: Allocation: Randomized. Intervention model: Parallel Assignment. Primary purpose: Treatment. Masking: Triple (Participant, Investigator, Outcomes Assessor).
• Phase: N/A

Countries of recruitment

Norway

Contacts

• Name: Håvard Nygaard, MSc
• Affiliation: Inland Norway University of Applied Sciences

Key inclusion & exclusion criteria

Inclusion Criteria:

- Individuals that have performed strength and / or endurance exercise training at least 3
X week for at least 6 months prior to the study



Age minimum: 18 Years
Age maximum: 40 Years
Gender: All

Health Condition(s) or Problem(s) studied

Healthy Subjects, Trained

Intervention(s)

Dietary Supplement: Placebo

Dietary Supplement: Vitamin D3

Primary Outcome(s)

Lower body maximal dynamic strength [Time Frame: wk 0, wk12]

Muscle fiber composition [Time Frame: wk0, wk12]

Secondary Outcome(s)

Vitamin D in blood [Time Frame: wk0, wk12]

Upper body maximal dynamic strength [Time Frame: wk0, wk12]

Steroid hormones in blood [Time Frame: wk0, wk12]

Gene expression in muscle [Time Frame: wk0, wk12]

Muscular endurance [Time Frame: wk0, wk12]

Secondary ID(s)

Trainsome 2015#006

Source(s) of Monetary Support

Please refer to primary and secondary sponsors

Secondary Sponsor(s)

Sykehuset Innlandet HF