Is vitamin D status reflected by testosterone concentration in elite athletes?

Jarosław Krzywański , Andrzej Pokrywka , Marcel Młyńczak , Tomasz Mikulski


Vitamin D is a nutrient whose active form affects tissues as a hormone and possibly enhances performance. One plausible mechanism is by increasing testosterone concentration, which is established as an important factor for athletic performance. Therefore the aim of the study was to examine the relationship between plasma concentration of 25(OH)D and testosterone in Polish elite track and field athletes depending on vitamin D status, season, training period, body composition, sex, type of training, sun exposure and vitamin D supplementation. Plasma concentrations of 25(OH)D and testosterone were measured in all seasons within two years in athletes (70 females, 79 males) who represent strength (n = 103) and endurance (n = 46) kinds of sports, in the preparatorycompetitive season and transition period. There were no differences in 25(OH)D concentration between male and female athletes, insufficiency [25(OH)D < 30 ng/ml] was observed in 32.9%, whereas deficiency [25(OH)D < 20 ng/ ml] in 3.2%. Circannual rhythm was noted for vitamin D but not for testosterone concentration; no correlations between them were found either in strength or endurance athletes or between 25(OH)D and body composition. Testosterone concentration was higher in the transition period than in the preparatory-competition period only in male athletes. Higher 25(OH)D was observed in athletes who trained during winter in Africa (higher sun exposure) or used oral supplementation, whereas the respective testosterone levels were unchanged. In athletes, testosterone concentration did not reflect vitamin D status. The widespread of inadequate vitamin D status among athletes, makes it vital to recommend them the regular monitoring of 25(OH)D concentration and use of reasonable supplementation.
Author Jarosław Krzywański - National Centre for Sports Medicine
Jarosław Krzywański,,
, Andrzej Pokrywka - Medical University of Warsaw (WUM)
Andrzej Pokrywka,,
, Marcel Młyńczak (FM / IMBE)
Marcel Młyńczak,,
- The Institute of Metrology and Biomedical Engineering
, Tomasz Mikulski - Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland
Tomasz Mikulski,,
Journal seriesBiology of Sport, ISSN 0860-021X, e-ISSN 2083-1862
Issue year2020
Publication size in sheets0.5
Keywords in Englishvitamin D status, testosterone, exercise, athletes, seasonal rhythm
ASJC Classification2732 Orthopedics and Sports Medicine; 2737 Physiology (medical); 3612 Physical Therapy, Sports Therapy and Rehabilitation
Languageen angielski
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 10-06-2020, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.035; WoS Impact Factor: 2018 = 2.202 (2) - 2018=2.004 (5)
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