Physical performance is not improved with vitamin D repletion: a randomized trial.

What Was Tested

This randomized controlled trial looks at Vitamin D, K2, Magnesium and Zinc.

This approach will not likely get all participants to the optimal 25(OH)D level proposed for optimal physical performance.

Therefore, it's important to enroll vitamin D insufficient/deficient participants to observe the effects of vitamin D supplementation on physical performance.

Who Took Part

The study group was 42 participants.

By PubMed's age tags, the people studied were teenagers, young adults and adults, both men and women.

The researchers conducted a double-blind randomized control trial in 42 physically active participants, 18-42 years of age in the winter months.

How the Study Was Run

The researchers set it up as a randomized and double-blind 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 modified Wingate test, 10m and 40m sprints, vertical jump, hand grip strength, pushups, and isokinetic knee flexion and extension were assessed before and after repletion of 25(OH)D.

What Was Measured

This approach will not likely get all participants to the optimal 25(OH)D level proposed for optimal physical performance.

Topics PubMed links to this paper include Dietary Supplements, Hand Strength, Physical Functional Performance, Seasons and Vitamin D.

What This Means in Plain Language

The paper is a randomized and double-blind study of Vitamin D, K2, Magnesium and Zinc in 42 participants.

Its findings take up roughly 4 sentences of the abstract and are left out here on purpose; the source paper is the place to read them.

The publication is from 2020 (The Journal of sports medicine and physical fitness), a journal based in Italy.

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