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Completed

NCT Number: NCT03584256

Vitamin D Status Among Competitive Female Gymnast and Swimmers After Winter Time

As indoor athletes, competitive gymnasts and swimmers can face the problem of a potential vitamin D deficiency. In the last decades, indoor sports participants have been faced with the problem of an institutionalized lifestyle and, in some places, a lower exposure to sun, which is also associated with the geographical area with a lower or higher UV index, especially in autumn, winter, and early spring (from October to April), when the day is shorter and the clock shifts to winter time. The problem with gymnasts and swimmers lies in daily trainings in the gym and pool and in the daily rest between two trainings, which can be spend more or less institutionally. The investigators wanted to examine the vitamin D status related to bone mineral density, body composition and various cardiovascular markers among young competitive gymnasts and swimmers after winter time. The investigators want to potentially give more solid but sensible recommendations for trainers, athletes, parents and sports doctors when it comes to vitamin D supplementations for indoor female athletes.

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Key information

Conditions

Vitamin D Deficiency Avitaminosis Cardiovascular Risk Factor Deficiency Diseases Injuries Malnutrition Nutrition Disorders Nutritional Deficiency Nutritional and Metabolic Diseases Wounds and Injuries

Age range

12 year and older

Sex eligibility

Female

Study type

Observational

Primary location

Faculty of Sport

Ljubljana, 1000, Slovenia

About this study

In this cross-sectional survey, the investigators will document vitamin D and the status of other micronutrients related to bone mineral density, body composition and a variety of risk factors for chronic non-communicable diseases.

The investigators hypothesize that there exists a serious problem of vitamin D deficiency among indoor athletes related to bone health, injuries and general health - especially when they are not using supplements. It is well known that vitamin D may improve athletic performance in vitamin D-deficient athletes.

International and national-level female gymnasts and swimmers that will be enrolled will sign an informed consent statement for the inclusion in this survey and the choice to participate in the study will be made by coaches and participants themselves and, in the event of females under 18 years of age, also by their parents, in accordance with the Helsinki declaration.

The investigators plan to enroll at least 30 female participants (15 gymnasts and 15 swimmers) who compete on an international and national level and are older than 12 years of age.

The investigators will measure the athletes' biochemistry in overnight fasted state (micronutrients, including vitamin D (25(OH)D), B12, Ca, Fe, Mg, K and P, lipids, liver enzymes, glucose, creatinine, etc.), their seated blood pressure status, bone mineral density (also segmental) and body composition, using Dual-energy X-ray absorptiometry (DXA), their dietary choice and nutrition intake status, using standardized Food frequency questionnaire (FFQ), their training characteristics, injury status and menstrual status. Athletes who are using vitamin D supplements or who have attended a one-month training camp in the southern geographical zone (Africa) will serve us as control group.

Who can participate

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • international and national level
  • Signed informed consent for participation in the study

Exclusion criteria

-

Treatment and study plan

Primary outcomes

  1. Differences between female gymnasts and swimmers of vitamin D status

    Time frame: April 2018

    Serum 25(OH)D (ng/ml) status after winter time

Secondary outcomes

  1. Differences between female gymnasts and swimmers of bone mineral density status

    Time frame: April 2018

    Bone mineral density status (g/cm3) using DEXA

Other outcomes

  1. Differences between female gymnasts and swimmers of body composition status

    Time frame: April 2018

    Lean and fat tissue mass (%) assessed dy DEXA

Sponsors and collaborators

Lead sponsor

University of Ljubljana

Other

Collaborators

  • Barbara Jakše s.p.

Registry information

Official study title

Vitamin D Status Relate to Bone Mineral Density, Body Composition and Variey Cardiovascular Risk Factors Among Competitive Female Gymnasts and Swimmers After Winter Time

Important dates

Study start
2018
Primary completion
2018
Study completion
2018
First posted
Jul 12, 2018
Registry last updated
Jul 12, 2018

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

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This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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