Seasonal changes in free 25-(OH)D and vitamin D metabolite ratios and their relationship with psychophysical stress markers in male professional football players.

Novel markers of vitamin D status are currently being investigated, including free 25-(OH)D (25-(OH)D) and the vitamin D metabolite ratio (24,25-(OH)D:25-(OH)D; VMR). The VMR may provide additional functional information on vitamin D metabolism in athletes. Therefore, the main objective of the current study was to evaluate 25-(OH)D, bioavailable 25-(OH)D (25-(OH)D), VMR, and psychophysical stress markers during different training periods over a half-season.

Metabolism of vitamin D is not affected by sport activity.

Background: Higher levels of physical activity are related to higher 25-(OH)D levels. Total 25-(OH)D (25-(OH)D) are routinely used in clinical practice to assess vitamin D, however novel biomarkers are currently being investigated as free 25-(OH)D (25-(OH)D) or vitamin D metabolite ratios (VMRs). The primary aim of our study was to assess 25-(OH)D, vitamin D metabolites and VMRs in inactive men and athletes.

Effects of running a marathon on sclerostin and parathyroid hormone concentration in males aged over 50.

The aim of our study was to verify whether running a marathon (32nd Wroclaw Marathon) was associated with changes in sclerostin and intact PTH (iPTH) concentration in middle-aged males. We enrolled 33 males who completed the marathon race. Blood samples were taken 60 minutes before (V1), immediately after (V2), and 7 days after the run (V3).

Corrigendum: Relationship between metabolites of vitamin D, free 25-(OH)D, and physical performance in indoor and outdoor athletes.

[This corrects the article DOI: 10.3389/fphys.2022.

How Do Male Football Players Meet Dietary Recommendations? A Systematic Literature Review.

The aim of this review was to determine whether male football players meet dietary recommendations according to a UEFA expert group statement and to identify priority areas for dietetic intervention, including training periodization and field position. A database search of PubMed, Web of Science, EBSCO and Scopus was performed. To be included within the final review, articles were required to provide a dietary intake assessment of professional and semi-professional football players.