Vitamin D Supplementation in Physical Performance

Efficacy of Vitamin D Supplementation in Physical Performance of Iranian Elite Athletes

This study was performed to evaluate the efficacy of weekly vitamin D supplementation on athletic performance in Iranian athletes

Study Overview

• Status: Completed
• Conditions: Healthy; Athletes
• Intervention / Treatment: Other: Placebo; Dietary supplement: vitamin D supplement

Detailed Description

Seventy subjects were enrolled in the study. The athletes were randomly divided into two groups: vitamin D supplement (D; received 50,000 IU of vitamin D supplement weekly) and control (P, received a placebo weekly). Duration of the study was eight weeks. Anthropometric, dietary, athletic performance and biochemical evaluations were performed for all subjects in the beginning and in the end of the intervention period.

• Study Type: Interventional
• Enrollment (Actual): 70
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Iran, Islamic Republic of
  • Tehran
    • Tehrān, Tehran, Iran, Islamic Republic of
      • National Nutrition and Food Technology Research Institute

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 30 years (Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: All

Description

Inclusion Criteria:

• healthy
• professional athletes

Exclusion Criteria:

• receiving vitamin D supplement in past 3 months

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Triple

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: vitamin D supplement; D	Dietary supplement: vitamin D supplement; D; received 50,000 IU of vitamin D supplement weekly; Other Names: D
Placebo Comparator: control; P	Other: Placebo; placebo; Other Names: P

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Changes from baseline serum 25-hydroxy vitamin D at eight weeks	nmol/L	8 weeks

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Changes from baseline Truncal Fat at eight weeks	percent	8 weeks
Changes from baseline visceral fat at eight weeks	percent	8 weeks
Changes from Strength leg press at 8 weeks	percent	8 weeks
Changes from Ergojump at 8 weeks	percent	8 weeks
Changes from baseline Vertical jump at 8 weeks	percent	8 weeks
Change from baseline Agility at 8 weeks	percent	8 weeks
changes from Speed at 8 weeks	percent	8 weeks

Collaborators and Investigators

• Sponsor: National Nutrition and Food Technology Institute
• Investigators: Study Chair: Tirang R. Neyestani, PhD, Laboratory of Nutrition Research, National Nutrition and Food Technology Research Institute (NNFTRI) and Faculty of Nutrition Science and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Study record dates

Study Major Dates

• Study Start (Actual): March 1, 2017
• Primary Completion (Actual): September 1, 2017
• Study Completion (Actual): September 30, 2017

Study Registration Dates

• First Submitted: October 20, 2017
• First Submitted That Met QC Criteria: October 27, 2017
• First Posted (Actual): October 30, 2017

Study Record Updates

• Last Update Posted (Actual): October 30, 2017
• Last Update Submitted That Met QC Criteria: October 27, 2017
• Last Verified: October 1, 2017

More Information

Terms related to this study

• Keywords: physical performance; vitamin D; atletes
• Additional Relevant MeSH Terms: Physiological Effects of Drugs; Micronutrients; Vitamins; Bone Density Conservation Agents; Vitamin D
• Other Study ID Numbers: 054-575

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No