Impact of vitamin D supplementation during a resistance training intervention on body composition, muscle function, and glucose tolerance in overweight and obese adults.

What Was Tested

Researchers studied Vitamin D, K2, Magnesium and Zinc in this randomized controlled trial publication.

The impact of vitamin D supplementation in overweight and obese adults during resistance training on body composition, muscle function, and glucose tolerance was investigated.

Who Took Part

PubMed indexes the participants as young adults and adults, both men and women.

Twenty-three overweight and obese (age: 26.1±4.7 y; BMI: 31.3±3.2 kg/m(2); 25-hydroxyvitamin D: 19.3±7.2 ng/mL) adults were recruited for participation in a double-blind, placebo-controlled trial.

How the Study Was Run

In design terms this was a randomized, double-blind and placebo-controlled study.

Because people in this Vitamin D, K2, Magnesium and Zinc study were split into groups at random, differences between the groups are less likely to reflect who happened to join each one.

As a double-blind Vitamin D, K2, Magnesium and Zinc study, the assignments were hidden from both participants and investigators until the end.

A placebo (an inactive look-alike) gave the Vitamin D, K2, Magnesium and Zinc group a baseline to be compared against.

Both groups completed 12 weeks of resistance training. 25-hydroxyvitamin D, parathyroid hormone, body composition, and glucose tolerance were assessed at baseline and 12 weeks.

Muscle function (strength and power) was assessed at baseline, 4, 8, and 12 weeks.

What Was Measured

The subject headings attached to it are Body Composition, Body Mass Index, Dietary Supplements, Glucose Intolerance, Linear Models, Muscle, Skeletal and Nutrition Assessment.

What This Means in Plain Language

The paper is a randomized, double-blind and placebo-controlled study of Vitamin D, K2, Magnesium and Zinc.

Results are reported in around 5 sentences of the abstract; we leave them to the paper itself rather than summarise them.

The publication is from 2013 (Clinical nutrition (Edinburgh, Scotland)), a journal based in England.

More context: the Vitamin D, K2, Magnesium and Zinc compound page, all human trials.