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Molina-López J, Herrera-Quintana L, Vázquez-Lorente H, Planells E. Evolution of Vitamin D Status and Vitamin D Receptor Gene Expression Among Professional Handball Athletes During a Competitive Period. Relationship with Body Composition, Calcium, Magnesium and Phosphorous. Biol Trace Elem Res 2024; 202:1345-1355. [PMID: 37410265 PMCID: PMC10859345 DOI: 10.1007/s12011-023-03760-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Accepted: 06/29/2023] [Indexed: 07/07/2023]
Abstract
INTRODUCTION A generalized risk of vitamin D deficiency exists worldwide affecting also professional and elite athletes. This study assesses the evolution of vitamin D status and vitamin D receptor (VDR) gene expression and their relationship with body composition, calcium (Ca), magnesium (Mg) and phosphorous (P) among professional handball athletes during a competitive period. METHODS A total of 26 male subjects were recruited: 13 professional handball athletes and 13 non-athlete controls. An observational follow-up study was conducted in 2 time points over a 16-week period. Nutritional intake, body composition, and routinary biochemical parameters were measured via 24-hours recall, bioimpedance and enzyme immunoassay, respectively. Ca and Mg were measured by flame atomic absorption spectrophotometry and P was determined with the colorimetric method of Fiske-Subbarow. 25-hydroxyvitamin-D (25(OH)D) levels and its forms (i.e., 25(OH)D3 and 25(OH)D2) were measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS), whereas VDR gene expression was measured by quantitative real time-polymerase chain reaction (qRT-PCR). RESULTS A total of 54% of the athletes showed deficient vitamin D status. Moreover, a prevalence of insufficient vitamin D status in handball players affected 46% at baseline, reaching 61% after 16 weeks. Vitamin D showed no evolution during the competitive period and no differences between groups were observed (all p ≥ 0.05). Handball players increased the VDR expression, enhanced body composition, Ca and Mg levels at 16-weeks follow-up (all p < 0.05). VDR gene expression was positively related with body mass and body mass index at follow-up in athletes (all p ≤ 0.038; r ≥ 0.579) and with Ca at baseline in controls (p = 0.026; r = 0.648). Finally, 25(OH)D2 form was directly associated with P in athletes at 16 weeks of study (p = 0.034; r = 0.588). CONCLUSION Players of indoor team sports such as handball would be a population at risk of vitamin D deficiency. The 16-weeks competition improved VDR gene expression, body composition, Ca and Mg levels. The associations observed between VDR gene expression and the variables of the study evidenced the importance of this receptor as a marker involved in health status in handball athletes despite vitamin D - although in a deficient status -, Ca, Mg and P showed no remarkable changes during the competition period.
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Affiliation(s)
- Jorge Molina-López
- Faculty of Education, Psychology and Sports Sciences, University of Huelva, Huelva, 21007, Spain
- Department of Physiology, School of Pharmacy. Institute of Nutrition and Food Technology "José Mataix", University of Granada, Granada, 18071, Spain
| | - Lourdes Herrera-Quintana
- Department of Physiology, School of Pharmacy. Institute of Nutrition and Food Technology "José Mataix", University of Granada, Granada, 18071, Spain
| | - Héctor Vázquez-Lorente
- Department of Physiology, School of Pharmacy. Institute of Nutrition and Food Technology "José Mataix", University of Granada, Granada, 18071, Spain.
| | - Elena Planells
- Department of Physiology, School of Pharmacy. Institute of Nutrition and Food Technology "José Mataix", University of Granada, Granada, 18071, Spain
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West S, Monteyne AJ, van der Heijden I, Stephens FB, Wall BT. Nutritional Considerations for the Vegan Athlete. Adv Nutr 2023; 14:774-795. [PMID: 37127187 PMCID: PMC10334161 DOI: 10.1016/j.advnut.2023.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/19/2023] [Accepted: 04/27/2023] [Indexed: 05/03/2023] Open
Abstract
Accepting a continued rise in the prevalence of vegan-type diets in the general population is also likely to occur in athletic populations, it is of importance to assess the potential impact on athletic performance, adaptation, and recovery. Nutritional consideration for the athlete requires optimization of energy, macronutrient, and micronutrient intakes, and potentially the judicious selection of dietary supplements, all specified to meet the individual athlete's training and performance goals. The purpose of this review is to assess whether adopting a vegan diet is likely to impinge on such optimal nutrition and, where so, consider evidence based yet practical and pragmatic nutritional recommendations. Current evidence does not support that a vegan-type diet will enhance performance, adaptation, or recovery in athletes, but equally suggests that an athlete can follow a (more) vegan diet without detriment. A clear caveat, however, is that vegan diets consumed spontaneously may induce suboptimal intakes of key nutrients, most notably quantity and/or quality of dietary protein and specific micronutrients (eg, iron, calcium, vitamin B12, and vitamin D). As such, optimal vegan sports nutrition requires (more) careful consideration, evaluation, and planning. Individual/seasonal goals, training modalities, athlete type, and sensory/cultural/ethical preferences, among other factors, should all be considered when planning and adopting a vegan diet.
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Affiliation(s)
- Sam West
- Public Health and Sport Sciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom
| | - Alistair J Monteyne
- Public Health and Sport Sciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom
| | - Ino van der Heijden
- Public Health and Sport Sciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom
| | - Francis B Stephens
- Public Health and Sport Sciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom
| | - Benjamin T Wall
- Public Health and Sport Sciences, Faculty of Health and Life Sciences, University of Exeter, Exeter, United Kingdom.
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Smith ES, McKay AKA, Kuikman M, Ackerman KE, Harris R, Elliott-Sale KJ, Stellingwerff T, Burke LM. Managing Female Athlete Health: Auditing the Representation of Female versus Male Participants among Research in Supplements to Manage Diagnosed Micronutrient Issues. Nutrients 2022; 14:3372. [PMID: 36014878 PMCID: PMC9412577 DOI: 10.3390/nu14163372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 11/26/2022] Open
Abstract
Micronutrient deficiencies and sub-optimal intakes among female athletes are a concern and are commonly prevented or treated with medical supplements. However, it is unclear how well women have been considered in the research underpinning current supplementation practices. We conducted an audit of the literature supporting the use of calcium, iron, and vitamin D. Of the 299 studies, including 25,171 participants, the majority (71%) of participants were women. Studies with exclusively female cohorts (37%) were also more prevalent than those examining males in isolation (31%). However, study designs considering divergent responses between sexes were sparse, accounting for 7% of the literature. Moreover, despite the abundance of female participants, the quality and quantity of the literature specific to female athletes was poor. Just 32% of studies including women defined menstrual status, while none implemented best-practice methodologies regarding ovarian hormonal control. Additionally, only 10% of studies included highly trained female athletes. Investigations of calcium supplementation were particularly lacking, with just two studies conducted in highly trained women. New research should focus on high-quality investigations specific to female athletes, alongside evaluating sex-based differences in the response to calcium, iron, and vitamin D, thus ensuring the specific needs of women have been considered in current protocols involving medical supplements.
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Affiliation(s)
- Ella S. Smith
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC 3000, Australia
| | - Alannah K. A. McKay
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC 3000, Australia
| | - Megan Kuikman
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC 3000, Australia
| | - Kathryn E. Ackerman
- Wu Tsai Female Athlete Program, Boston Children’s Hospital and Harvard Medical School, Boston, MA 02115, USA
| | - Rachel Harris
- Female Athlete Performance and Health Initiative, Australian Institute of Sport, Canberra, ACT 2617, Australia
- Perth Orthopaedic and Sports Medicine Research Institute, West Perth, WA 6005, Australia
| | | | - Trent Stellingwerff
- Canadian Sport Institute-Pacific, Institute for Sport Excellence, 4371 Interurban Road, Victoria, BC V9E 2C5, Canada
- Exercise Science, Physical and Health Education, University of Victoria, Victoria, BC V8P 5C2, Canada
| | - Louise M. Burke
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, VIC 3000, Australia
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Alaraj M, Alenazi FS, Hassan D, Hossain A. Vitamin D as a drug: new therapeutic approaches. PHARMACIA 2022. [DOI: 10.3897/pharmacia.69.e85057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Vitamin D is one of the essential vitamins and has recently been demonstrated to be much more important for the appropriate functioning of the human body and well-being than initially believed. Although vitamin D is mainly known for its link with bone fractures and bone diseases, recent studies revealed that vitamin D and its analogues have revealed many pharmacological actions covering the regulation of cell growth, inhibition of inflammation, and improvement of neuromuscular function and immune function. Moreover, vitamin D and its analogues are reported to have role in different types of cancers, skin diseases, diabetes mellitus and infections caused by different bacterial and viral pathogens including SARS-CoV-2. The goal of this study is to evaluate the scientific literature on therapeutic uses of vitamin D and its analogues against different diseases and health condition. Special attention has been given to COVID-19 infection, cancer, skin diseases, and diabetes. The molecular mechanisms involved are also explored.
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Changes of 25(OH)D Concentration, Bone Resorption Markers and Physical Performance as an Effect of Sun Exposure, Supplementation of Vitamin D and Lockdown among Young Soccer Players during a One-Year Training Season. Nutrients 2022; 14:nu14030521. [PMID: 35276883 PMCID: PMC8838295 DOI: 10.3390/nu14030521] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 01/18/2022] [Accepted: 01/21/2022] [Indexed: 12/10/2022] Open
Abstract
The main purpose of this research was to demonstrate the changes in 25(OH)D concentration, bone resorption markers, and physical fitness along the one-year training season in young soccer players. A total of 24 young soccer players (age: 17.2 ± 1.16 years, mass: 70.2 ± 5.84, height: 179.1 ± 4.26 cm) were tested at four different time points across one year (T1—September 2019; T2—December 2019; T3—May 2020; T4—August 2020). After T2 (during COVID-19 lockdown), players were divided into a supplemented (GS) group and a placebo group (GP). Variables such as 25(OH)D, calcium (Ca), phosphorus (P), parathyroid hormone (PTH), aerobic capacity, speed, and explosive power were measured. Analyses performed for all participants indicated significant changes in all selected blood markers and running speed. The highest values in 25(OH)D were noted during summertime in T1 and T4. After individuals were split into two groups, a two-factorial ANOVA demonstrated a significant time interaction for 25(OH)D, Ca, P, PTH, 30 m sprint, and counter-movement jump. Significant time x group effect was calculated for aerobic capacity. This study confirmed that 25(OH)D concentration varies between four seasons, with the greatest decreases in the low sunlight periods. Vitamin D supplementation did not cause a preventive and long-lasting effect of increasing the 25(OH)D concentration in the young soccer players.
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McMurray N, Reinke E, Riboh J, Pyles C, Bytomski J. Medical Diagnoses in a University Athlete Training Room Clinic. Clin J Sport Med 2022; 32:e35-e39. [PMID: 33852438 DOI: 10.1097/jsm.0000000000000895] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 08/31/2020] [Indexed: 02/02/2023]
Abstract
INTRODUCTION Approximately 560 000 student-athletes participate in university athletic programs every year. These athletes develop a variety of medical injuries and illnesses during their time at the university. There is currently a paucity of data with regarding medical encounters in a dedicated university athlete training room clinic. OBJECTIVE This study aims to provide data regarding medical diagnoses from a university athlete training room clinic. STUDY DESIGN Descriptive epidemiology study. SETTING University athlete training room clinic. PATIENTS University athletes. METHODS The electronic medical record for a year-round, athlete-only training room clinic at a private US university was reviewed. Athlete age, sex, sport, date of medical encounter, and encounter diagnoses across 5 calendar years were recorded; medical diagnoses were then manually stratified into diagnostic categories and subgroups. RESULTS A total of 1258 university athletes were evaluated during 5303 medical encounters. Approximately two-thirds of athletes were evaluated one or more times per year. Average number of encounters per athlete per year was 2.2 (0.6-3.8, 95% confidence interval). The football team accounted for the greatest number of encounters (15.2% of total encounters). The most common medical diagnosis category was otorhinolaryngology (30.6% of total diagnoses). The most common diagnosis subgroup was upper respiratory infection (14.8% of total diagnoses). CONCLUSIONS Approximately two-thirds of athletes were evaluated annually with an average of 2 encounters per athlete per year. Upper respiratory infection represented the most common individual diagnosis. The results reported in this study may be useful in directing future care and research of university athletes.
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Affiliation(s)
- Nathan McMurray
- Duke Sports Science Institute, Duke Division of Sports Medicine. Duke Orthopedics Department. Duke University Health System. Durham, North Carolina
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Prevalence and novel risk factors for vitamin D insufficiency in elite athletes: systematic review and meta-analysis. Eur J Nutr 2022; 61:3857-3871. [PMID: 35882673 PMCID: PMC9596536 DOI: 10.1007/s00394-022-02967-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 07/18/2022] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND PURPOSE Vitamin D insufficiency may be common among elite athletes, but prevalence is unclear, and some potentially important risk factors are uncertain. The present study aimed to (a) estimate the prevalence of vitamin D insufficiency in elite athletes, and (b) examine differences in prevalence between the sexes, and between adults and adolescents, from recent studies which used a contemporary definition of insufficiency. METHODS Four databases (Web of Science, SPORTDiscus, PubMed, and Sports Medicine and Education Index) were searched for studies in elite athletes. Literature selection, data extraction, and risk of bias assessment were conducted independently by two researchers. Vitamin D insufficiency was defined as 25(OH)D < 50 nmol/L. Meta-analysis was conducted, using R software x64 4.0.2, to provide estimates of prevalence of insufficiency for adults and adolescents, and to examine between-sex differences in risk of insufficiency. RESULTS From the initial 943 literature search hits, 51 studies were eligible with 5456 participants, 33 studies in adults (12/33 in winter and spring), 15 studies in adolescents (6/15 in winter and spring) and 3 studies with age of study participants not given. Prevalence of vitamin D insufficiency from meta-analysis was 30% (95% CI 22-39%) in adults and prevalence was higher, though not significantly so, at 39% (95% CI 25-55%) in adolescents. Differences in the prevalence of insufficiency between the sexes for the eight studies which provided within-study comparisons was not significant (RR = 1.0; 95% CI 0.79-1.26). Evidence quality was moderate. CONCLUSIONS Prevalence of vitamin D insufficiency (≤ 50 nmol/L) in elite athletes is high, suggesting a need for greater attention to prevention and treatment. Prevalence estimates in the present study are conservative due to a relative lack of studies in winter. While there was no evidence of higher risk among women than men in the present study, there was less evidence on women.
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Xiaomang J, Yanling W. Effect of vitamin D3 supplementation during pregnancy on high risk factors - a randomized controlled trial. J Perinat Med 2021; 49:480-484. [PMID: 33554587 DOI: 10.1515/jpm-2020-0318] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 12/03/2020] [Indexed: 01/20/2023]
Abstract
OBJECTIVES Vitamin D plays an important role in the release of the placenta and implantation, and low levels are a risk factor for pre-eclampsia. Studies have also shown that symptomatic treatment of vitamin D3 deficiency can effectively reduce the risk of pre-eclampsia. In this study, vitamin D3 supplementation was performed on the risk of pre-eclampsia to observe its effect. METHODS From January 2016 to December 2018, 450 women with maternal treatment and delivery in our hospital underwent an open-label randomized study. The pregnant women were divided into low-dose, medium-dose, and high-dose groups. Compare the incidence of pre-eclampsia and the dose effect of vitamin D levels. RESULTS In the maternal and perinatal periods of the 450 maternal women, the 25[OH] index of the three groups of pregnant women was significantly increased, while the high-dose increase index was more obvious. The relative risk reduction rate was significantly lower. Compared with the low-dose and middle-dose groups, the high-dose group had a significantly lower incidence of pre-eclampsia, while the IUGR index was lower, and other obstetric indicators were comparable. CONCLUSION Vitamin D supplementation can effectively reduce the incidence of pre-eclampsia, while reducing the IUGR index, which has important value and significance in its clinical application.
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Affiliation(s)
- Jiang Xiaomang
- Department of Obstetrics and Gynecology, Chang'an Hospital, Xi'an, Shaanxi Province, P.R. China
| | - Wei Yanling
- Department of Obstetrics and Gynecology, Xijing Hospital of the Air Force Military Medical University, Xi'an, Shaanxi Province, P.R. China
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Nowak J, Hudzik B, Jagielski P, Kulik-Kupka K, Danikiewicz A, Zubelewicz-Szkodzińska B. Lack of Seasonal Variations in Vitamin D Concentrations among Hospitalized Elderly Patients. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18041676. [PMID: 33572447 PMCID: PMC7916205 DOI: 10.3390/ijerph18041676] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 02/02/2021] [Accepted: 02/07/2021] [Indexed: 12/17/2022]
Abstract
Background. Generally, most vitamin D in the human body (90–95%) is produced in the skin during exposure to sunlight. The effectiveness of this process depends on several biological and physical factors, e.g., age or latitude. Skin synthesis of vitamin D among elderly people is reduced. The aim of the study was to assess serum 25-hydroxyvitamin D [25(OH)D] seasonal variations in elderly patients hospitalized at the geriatric department. Methods. The study was carried out on 242 patients aged 60 years or older hospitalized at the geriatric department. The study group was categorized by four seasons as well as month. Results. The median (interquartile range) 25(OH)D concentration among all patients (n = 242) was 33.95 (26.96–45.18) nmol/L. There was no statistical significance in the median serum 25(OH)D concentration with regard to each of the four seasons: in the spring 32.95 (25.96–43.68) nmol/L, in the summer 38.69 (27.46–50.67) nmol/L, in the autumn 33.45 (27.08–44.18) nmol/L, in the winter 34.57 (23.46–43.93) nmol/L, (p = 0.48). Conclusions. Vitamin D deficiency was observed in all geriatric patients, irrespective of the season. The results of the study indicate no significant differences in median vitamin D concentration among the hospitalized patients across all four seasons. Even in the summer months, in our climate, it is fairly difficult for an elderly person to produce an adequate amount of vitamin D through the skin. Therefore, proper vitamin D supplementation is recommended and should be implemented in the elderly irrespective of the season.
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Affiliation(s)
- Justyna Nowak
- Department of Cardiovascular Disease Prevention, Department of Metabolic Disease Prevention, Faculty of Health Sciences in Bytom, Medical University of Silesia, 41-900 Bytom, Poland;
- Correspondence: ; Tel.: +483-2397-6541
| | - Bartosz Hudzik
- Department of Cardiovascular Disease Prevention, Department of Metabolic Disease Prevention, Faculty of Health Sciences in Bytom, Medical University of Silesia, 41-900 Bytom, Poland;
- Third Department of Cardiology, Silesian Center for Heart Disease, Faculty of Medical Sciences in Zabrze, Medical University of Silesia, 41-800 Zabrze, Poland
| | - Paweł Jagielski
- Department of Nutrition and Drug Research, Faculty of Health Science, Jagiellonian University Medical College, 31-007 Cracow, Poland;
| | - Karolina Kulik-Kupka
- Department of Nutrition-Related Disease Prevention, Department of Metabolic Disease Prevention, Faculty of Health Sciences in Bytom, Medical University of Silesia, 41-900 Bytom, Poland; (K.K.-K.); (A.D.); (B.Z.-S.)
| | - Aleksander Danikiewicz
- Department of Nutrition-Related Disease Prevention, Department of Metabolic Disease Prevention, Faculty of Health Sciences in Bytom, Medical University of Silesia, 41-900 Bytom, Poland; (K.K.-K.); (A.D.); (B.Z.-S.)
| | - Barbara Zubelewicz-Szkodzińska
- Department of Nutrition-Related Disease Prevention, Department of Metabolic Disease Prevention, Faculty of Health Sciences in Bytom, Medical University of Silesia, 41-900 Bytom, Poland; (K.K.-K.); (A.D.); (B.Z.-S.)
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Abstract
Vitamin D Deficiency in Sports Abstract. A deficiency in vitamin D is very common in the general population as well as in athletes. The aim of this overview is to assess the level of knowledge about the importance of vitamin D for athletes. A deficiency in vitamin D is present in up to 90 % of athletes. Risk groups are young athletes, female athletes, athletes with a limitation such as paraplegia, vegetarians, athletes with a resorption disorder such as celiac disease, athletes training and competing indoors (e.g. ice hockey, basketball, boxing, rhythmic gymnastics), and older athletes. Dark skin pigmentation, the use of sunscreen, the time of day of the training (early morning, late evening) and the geographical location influence the risk for a deficiency in vitamin D. Exposure to the sun and a balanced diet are often not enough to prevent a vitamin D deficiency.
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Affiliation(s)
- Beat Knechtle
- Medbase St. Gallen Am Vadianplatz, St. Gallen
- Institut für Hausarztmedizin, Universität Zürich, Zürich
| | | | - Pantelis T Nikolaidis
- Exercise Physiology Laboratory, Nikaia, Griechenland
- School of Health and Caring Sciences, University of West Attica, Athen, Griechenland
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Micronutrient deficiency in athletes and inefficiency of supplementation: Is low energy availability a culprit? PHARMANUTRITION 2020. [DOI: 10.1016/j.phanu.2020.100229] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Abstract
Introduction Vitamin D is a micronutrient that plays a large role in bone disease, and researchers are now discovering that it also does so in non-skeletal disease, thus making high-quality analytical determination necessary. To make this determination, a series of immunochemical and physical methods are used. These methods present a series of different ways of handling samples as well as different methodologies that bring a series of advantages and limitations based on the scope of work in which the vitamin D analysis methodology is applied. Although the Liquid Chromatography-tandem Mass Spectrometry (LC-MS/MS) is the gold standard method of analytical vitamin D determination, and is the only one to offer a more complete and accurate view of all metabolites of this vitamin, it is necessary to standardize all the analysis methodologies that allow accurate, reliable and quality analytical determination, since it is essential to obtain results that can reliably be extrapolated to the population, and that can be decisive in assessing a large number of pathologies.
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Michalczyk MM, Gołaś A, Maszczyk A, Kaczka P, Zając A. Influence of Sunlight and Oral D 3 Supplementation on Serum 25(OH)D Concentration and Exercise Performance in Elite Soccer Players. Nutrients 2020; 12:nu12051311. [PMID: 32375348 PMCID: PMC7284423 DOI: 10.3390/nu12051311] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 04/29/2020] [Accepted: 05/01/2020] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was to evaluate the influence of natural sun exposure and six weeks of a high dose of vitamin D supplementation on vitamin D, testosterone and cortisol serum concentrations as well as speed, power and VO2max in professional soccer players. Materials: The study was conducted from January to September. At the beginning of the study, 33 professional soccer players were enrolled; however, only 28 subjects (height 181.5 cm; body mass 77.81 ± 8.8 kg; body fat 12.38% ± 2.4% and muscle mass 40.27 ± 5.3 kg) completed the study. The research consisted of three stages. The first one, lasting 10 days, was conducted in January during a training camp in the south part of Cyprus at a latitude of 34 33°, where participants experienced natural sun exposure; it was called a winter sun exposure (WSE) period. The second stage, which was a supplementation period (SP), lasted 6 weeks, during which all subjects were randomly assigned either to an experimental group—EG (n = 15)—or a placebo group—PG (n = 13)—and were administered 6000 IU/d cholecalciferol or a placebo, respectively. The third stage took place in September, after summertime (summer sun exposure—SSE). The data of the 25(OH)D, free and total testosterone (fT, tT), cortisol as well as 5 and 30 m sprint tests (STs), power of the left leg (PLL) and VO2max were evaluated before and after the WSE period, the SP and SSE. Results: In January, the baseline value of vitamin D in 12 subjects was ≤20 ng/mL, and 14 of them had levels between 20–30 ng/mL and 2 individuals >30 ng/mL. After the WSE period, significant changes in 25(OH)D, fT, tT and cortisol concentration, as well as in the 5 m ST, were observed. After the SP, in the EG, significant changes were found in 25(OH)D, fT, tT and the 5 m ST. Furthermore, a positive correlation between the concentration of 25(OH) fT and tT was observed. After SSE, 2 out of 28 players had <20 ng/mL 25(OH)D, 12 of them had 25(OH)D between 20 and 30 ng/mL and 14 of them had 25(OH)D between 30 and 50 ng/mL. Significant differences in 25(OH)D, fT, tT concentration and the 5 m ST performance were observed following SSE compared with the WSE period. Conclusion: Due to the serum level of 25(OH)D demonstrated by most participants at the beginning of the study and after summertime, all-year-round supplementation with high doses of vitamin D seems to be a reasonable solution to enhance high 25(OH)D concentration in blood and physical performance. In the middle of the winter, almost half of the soccer players were serum deficient of 25(OH)D. After ten days of sun exposure and 6 weeks of vitamin D supplementation, the concentration of 25(OH)D significantly increased, as did testosterone and results in the 5 m sprint test also improved. Therefore, athletes should be constantly monitored for serum levels of 25(OH)D throughout the year and should be supplemented if deficiencies or insufficient amounts of this vitamin occur.
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Affiliation(s)
- Małgorzata Magdalena Michalczyk
- Institute of Sport Sciences The Jerzy Kukuczka Academy of Physical Education in Katowice, Poland Mikolowska 72a, 40-065 Katowice, Poland; (A.G.); (A.M.); (A.Z.)
- Correspondence: ; Tel.: +48-3-2207-5343
| | - Artur Gołaś
- Institute of Sport Sciences The Jerzy Kukuczka Academy of Physical Education in Katowice, Poland Mikolowska 72a, 40-065 Katowice, Poland; (A.G.); (A.M.); (A.Z.)
| | - Adam Maszczyk
- Institute of Sport Sciences The Jerzy Kukuczka Academy of Physical Education in Katowice, Poland Mikolowska 72a, 40-065 Katowice, Poland; (A.G.); (A.M.); (A.Z.)
| | - Piotr Kaczka
- Research and Development Center, Olimp Laboratories Sp. z o.o, 39-200 Dębica, Poland;
| | - Adam Zając
- Institute of Sport Sciences The Jerzy Kukuczka Academy of Physical Education in Katowice, Poland Mikolowska 72a, 40-065 Katowice, Poland; (A.G.); (A.M.); (A.Z.)
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Downs NJ, Parisi AV, Schouten PW, Igoe DP, De Castro-Maqueda G. The Simulated Ocular and Whole-Body Distribution of Natural Sunlight to Kiteboarders: A High-Risk Case of UVR Exposure for Athletes Utilizing Water Surfaces in Sport. Photochem Photobiol 2020; 96:926-935. [PMID: 31883381 DOI: 10.1111/php.13200] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 11/20/2019] [Indexed: 12/18/2022]
Abstract
Kiteboarding is an aquatic sporting discipline that has not yet been considered in the literature to date in terms of solar ultraviolet radiation (UVR) measurement. Kiteboarders need to look upward and are placed obliquely relative to the horizon when towed behind an overhead kite over a reflective water surface. This research defines the typical body surface orientation of a kiteboarder in motion through video vector analysis and demonstrates the potential risk to ocular and skin surface damage through practical measurement of solar UVR using a manikin model. Video analysis of 51 kiteboarders was made to construct skeletal wireframes showing the surface orientation of the leg, thigh, spine, humerus, lower arm and head of a typical kiteboarder. Solar UVR dosimeter measurements made using a manikin model demonstrate that the vertex and anterior surfaces of the knee, lower leg and lower humerus received 89%, 90%, 80% and 63% of the available ambient UVR, respectively, for a typical kiteboarder who is tilted back more than 15° from vertical while in motion. Ocular (periorbital) exposures ranged from 56% to 68% of ambient. These new findings show that the anterior skin surfaces of kiteboarders and the eye are at elevated risk of solar UVR damage.
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Affiliation(s)
- Nathan J Downs
- Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD, Australia
| | - Alfio V Parisi
- Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD, Australia
| | - Peter W Schouten
- Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD, Australia
| | - Damien P Igoe
- Faculty of Health, Engineering and Sciences, University of Southern Queensland, Toowoomba, QLD, Australia
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15
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Wilson‐Barnes SL, Hunt JEA, Lanham‐New SA, Manders RJF. Effects of vitamin D on health outcomes and sporting performance: Implications for elite and recreational athletes. NUTR BULL 2020. [DOI: 10.1111/nbu.12413] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- S. L. Wilson‐Barnes
- Department of Nutritional Sciences Faculty of Health and Medical Sciences School of Biosciences and Medicine University of Surrey Guildford UK
| | - J. E. A. Hunt
- Department of Nutritional Sciences Faculty of Health and Medical Sciences School of Biosciences and Medicine University of Surrey Guildford UK
| | - S. A. Lanham‐New
- Department of Nutritional Sciences Faculty of Health and Medical Sciences School of Biosciences and Medicine University of Surrey Guildford UK
| | - R. J. F. Manders
- Department of Nutritional Sciences Faculty of Health and Medical Sciences School of Biosciences and Medicine University of Surrey Guildford UK
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16
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Wiciński M, Adamkiewicz D, Adamkiewicz M, Śniegocki M, Podhorecka M, Szychta P, Malinowski B. Impact of Vitamin D on Physical Efficiency and Exercise Performance-A Review. Nutrients 2019; 11:nu11112826. [PMID: 31752277 PMCID: PMC6893541 DOI: 10.3390/nu11112826] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 12/11/2022] Open
Abstract
Vitamin D deficiency amongst athletes and the general population seems to be a prominent problem. The most recognized role of vitamin D is its regulation of calcium homeostasis; there is a strong relationship between vitamin D and bone health. Moreover, its concentrations are associated with muscle function and immune response in both the general and athletic populations. Vitamin D level is strongly connected with the presence of VDRs (vitamin D receptors) in most human extraskeletal cells. Expression of multiple myogenic transcription factors enhancing muscle cell proliferation and differentiation is caused by an exposure of skeletal muscles to vitamin D. The aim of this review is to summarize current understanding of the significance of vitamin D on exercise performance and physical efficiency, as well to analyze the impact of vitamin D on multiple potential mechanisms. More high-quality research studies, considering free 25(OH)D as a better marker of vitamin D status, the baseline level of 25(OH)D and multiple pathways of vitamin D acting and usage in athletes are required.
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Affiliation(s)
- Michał Wiciński
- Department of Pharmacology and Therapeutics, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, M. Curie 9, 85-090 Bydgoszcz, Poland
- Correspondence: (M.W.); (D.A.); (B.M.)
| | - Dawid Adamkiewicz
- Department of Pharmacology and Therapeutics, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, M. Curie 9, 85-090 Bydgoszcz, Poland
- Correspondence: (M.W.); (D.A.); (B.M.)
| | - Monika Adamkiewicz
- Department of Pharmacology and Therapeutics, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, M. Curie 9, 85-090 Bydgoszcz, Poland
| | - Maciej Śniegocki
- Department of Neurosurgery, Neurotraumatology and Paediatric Neurosurgery, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Bydgoszcz, Poland
| | - Marta Podhorecka
- Department of Geriatrics, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Bydgoszcz, Poland
| | - Paweł Szychta
- Department of Plastic, Reconstructive and Aesthetic Surgery, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, 85-094 Bydgoszcz, Poland
| | - Bartosz Malinowski
- Department of Pharmacology and Therapeutics, Faculty of Medicine, Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University, M. Curie 9, 85-090 Bydgoszcz, Poland
- Correspondence: (M.W.); (D.A.); (B.M.)
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