Effect of Vitamin D Supplementation on Muscle Mass and Function

Completed · Phase 4 · Has a placebo group

Conditions studied: Obesity, Insulin Resistance, Inflammation

In brief

The study was designed to assess the effects of vitamin D supplementation during exercise training on body composition, muscle function, and glucose tolerance. The investigators hypothesis for these studies is that vitamin D supplementation enhances exercise-induced increases in strength and lean mass, potentially through enhancing insulin sensitivity and reducing inflammation.

Key facts

Study ID

NCT01199926

Run by

Purdue University

People needed

34

Starts

2008-08-01

Expected to finish

2010-02-01

Last updated by the study team

2015-05-15

Who can join

Age: 18 and older, up to 35. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Physical activity scores in the "low" to "very low" category
• Fitness estimations in the "below average" or lower categories
• body mass index scores >24.9 indicating overweight or obesity.

You may not qualify if…

• Use of tanning booths or other artificial UV light exposure
• High baseline vitamin D and calcium intake
• Plans to visit sunny/warm destinations during the winter months/study period
• History or presence of metabolic disease, type 2 diabetes, eating disorders, gastrointestinal disorders, pregnancy or lactation
• Use of drugs to treat obesity (last 12 weeks)
• Use of over the counter anti-obesity agents (last 12 weeks)
• Recent initiation of an exercise program (last four weeks).

Where it is running

• Wastl Human Performance Laboratory, Purdue University — West Lafayette, Indiana, United States

Full record on ClinicalTrials.gov

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