Relationship between 25(OH)D levels and athletic performance
in elite Polish judoists

Książek, Anna; Dziubek, Wioletta; Pietraszewska, Jadwiga; Słowińska-Lisowska, Małgorzata

doi:10.5114/biolsport.2018.74195

Cited by 28 publications

(12 citation statements)

References 20 publications

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“…Similar correlations, both with regard to plasma concentration of 25(OH)D and vitamin D supplementation and anaerobic performance parameters, have been found by several authors in active people [ 18 , 19 ]. Hamilton et al [ 20 ] found no correlation between the concentration of 25(OH)D and functional strength of skeletal muscles in professional footballers.…”

Section: Introductionsupporting

confidence: 87%

Seasonal Changes in 25(OH)D Concentration in Young Soccer Players—Implication for Bone Resorption Markers and Physical Performance

Jastrzębska

Skalska

Radzimiński

et al. 2021

IJERPH

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Searching for potential relations between changes in 25(OH)D concentration and in physical fitness is an interesting scientific topic. Thus, the main purpose of this study was to investigate the changes in serum concentrations of 25(OH)D in young football players in conjunction with indicators determining bone resorption and physical fitness. A total of 35 young soccer players were tested during the autumn competition period. Biochemical analysis of blood, aerobic capacity, running speed and power tests (Wingate test, squat jump, counter movement jump) were carried out at the beginning and at the end of the competition period. Significant decrements in concentration of 25(OH)D from 33.9 ± 5.87 to 23.7 ± 5.58 ng/mL were noted after the analyzed competition period. There were no significant changes in aerobic capacity along the competition period. Significant improvements were observed in 10 m sprint, 30 m sprint (p < 0.001), maximal power (p = 0.011) and total work capacity (p = 0.024). We found that the effect of changes in the players’ physical fitness does not occur in relation to 25 OH(D) concentration but occurs when these changes are analyzed as a function of the duration of the observation period. Changes in physical fitness of soccer players are determined by other factors then 25(OH)D concentration.

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Section: Introductionsupporting

confidence: 87%

Seasonal Changes in 25(OH)D Concentration in Young Soccer Players—Implication for Bone Resorption Markers and Physical Performance

Jastrzębska

Skalska

Radzimiński

et al. 2021

IJERPH

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“…Undertaking outdoor training seems to be associated with higher concentrations of 25(OH)D as compared with exercising indoors [ 38 ]. Lower vitamin D levels are more commonly observed in athletes who train indoors [ 34 , 38 , 47 ]. Many studies performed in European football players, particularly during the winter season, showed serum 25(OH)D levels below the recommended range [ 48 , 49 ].…”

Section: Discussionmentioning

confidence: 99%

Relationships between Vitamin D and Selected Cytokines and Hemogram Parameters in Professional Football Players—Pilot Study

Książek

Zagrodna

Bohdanowicz-Pawlak

et al. 2021

IJERPH

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Vitamin D affects both innate and adaptive immunity. Most of the effects of vitamin D on innate immunity are anti-inflammatory. In monocytes/macrophages, vitamin D suppresses the production of the inflammatory cytokines TNF-alpha, IL-1beta, IL-6, and IL-8. Therefore, the aim of our study was to investigate the relationship between 25(OH)D concentration and selected cytokines—IL-6, TNF-α, and IL-1β, which are hemogram parameters for professional football players. We enrolled 41 Polish premier league soccer players. The mean age, career duration, and VO2max were, respectively: 22.7 ± 5.3 years, 14.7 ± 4.5 years, and 55.8 ± 4.0 mL/kg/min. Serum levels of 25(OH)D were measured by electrochemiluminescence (ECLIA) using the Elecsys system (Roche, Switzerland). Serum levels of IL-6, IL-1β, and TNF-α were measured by ELISA (R&D Systems, Minneapolis). Blood count with smear was measured on a Sysmex XT-4000i analyzer (Sysmex Corporation, Japan). Our study showed decreased serum 25(OH)D levels in 78% of the professional players. We found a significant negative correlation between 25(OH)D levels and TNF-α and LYMPH (%). The results also demonstrated a statistically significant positive correlation between vitamin D levels and NEUTH (%), NEUTH (tys/µL), and EOS (tys/µL). Based on the results of our study, we concluded that football players from Poland are not protected against vitamin D insufficiency in winter months. Moreover, vitamin D deficiency may be associated with an increased pro-inflammatory risk in well-trained athletes.

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“…Several mechanisms have been suggested to explain the effects of vitamin D on muscle function (i.e., strength and power). The activated form of vitamin D has been reported to exert biological effects by binding to vitamin D receptors found in most human extra-skeletal cells, including skeletal muscle 31 . The number of nuclear vitamin D receptors in cells is related to muscle function; therefore, vitamin D may Vitamin D and athletes potentially affect muscle protein synthesis, neuromuscular control, and type II muscle fibers 33 .…”

Section: Vitamin D and Physical Performancementioning

confidence: 99%

“…Several studies have demonstrated that vitamin D insufficiency is significantly related to physical performance, especially power and strength, in soccer players [ 20 , 30 , 31 ]. Hamilton et al [ 20 ] reported that professional soccer players with severe 25(OH)D deficiency had lower peak torque values in the non-dominant leg compared with those with vitamin D levels > 30 ng/mL.…”

Section: Vitamin D and Physical Performancementioning

confidence: 99%

“…Other studies evaluated the effects of vitamin D levels on the strength and power of athletes participating in combat sports, such as judo and Taekwondo. Książek et al [ 31 ] demonstrated that decreased serum 25(OH) D levels in Polish elite judoists were positively correlated with left-hand grip strength, muscle power that was assessed on vertical jump, and total work in the left and right knee extensors at an angular velocity of 60°. Additionally, Seo et al [ 32 ] reported that in 15–18-year-old Taekwondo athletes, serum 25(OH)D levels were positively correlated with the mean power output and relative mean power output.…”

Section: Vitamin D and Physical Performancementioning

confidence: 99%

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Vitamin D in athletes: focus on physical performance and musculoskeletal injuries

2021

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[Purpose] The aim of this review was to discuss the effects of vitamin D on physical performance and musculoskeletal injuries in athletes and provide information on the field applications of vitamin D. [Methods] A systematic review was conducted to identify studies on vitamin D in athletes that assessed serum vitamin D levels, vitamin D and physical performance, vitamin D and musculoskeletal injuries, and practical guidelines for supplementation of vitamin D. [Results] Several studies reported that a high proportion of athletes had vitamin D insufficiency or deficiency. Low serum levels of vitamin D in athletes were more pronounced in winter than in other seasons, and indoor athletes had lower serum vitamin D levels than outdoor athletes. Low vitamin D levels have been demonstrated to have negative effects on muscle strength, power, and endurance; increase stress fractures and other musculoskeletal injuries; and affect acute muscle injuries and inflammation following high-intensity exercises. Therefore, periodic assessment and monitoring of vitamin D levels are necessary in athletes; the recommended serum level of 25(OH)D is > 32 ng/mL and the preferred level is > 40 ng/mL (-1). In those with low levels of vitamin D, exposure to sunlight and an improved diet or supplements may be helpful. Particularly, 2000–6000 IU of supplemental vitamin D3 can be consumed daily. [Conclusion] Vitamin D is a potential nutritional factor that can significantly affect physical performance and musculoskeletal injuries in athletes. The importance and role of vitamin D in athletes should be emphasized, and the current levels of vitamin D should be assessed. Therefore, it is essential to periodically evaluate and monitor serum vitamin D levels in athletes.

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Relationship between 25(OH)D levels and athletic performance in elite Polish judoists

Cited by 28 publications

References 20 publications

Seasonal Changes in 25(OH)D Concentration in Young Soccer Players—Implication for Bone Resorption Markers and Physical Performance

Seasonal Changes in 25(OH)D Concentration in Young Soccer Players—Implication for Bone Resorption Markers and Physical Performance

Relationships between Vitamin D and Selected Cytokines and Hemogram Parameters in Professional Football Players—Pilot Study

Vitamin D in athletes: focus on physical performance and musculoskeletal injuries

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