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Vitamin d and athlete

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https://www.readbyqxmd.com/read/29345167/dietary-supplements-for-health-adaptation-and-recovery-in-athletes
#1
Eric S Rawson, Mary P Miles, D Enette Larson-Meyer
Some dietary supplements are recommended to athletes based on data that supports improved exercise performance. Other dietary supplements are not ergogenic per se, but may improve health, adaptation to exercise, or recovery from injury, and so could help athletes to train and/or compete more effectively. In this review, we describe several dietary supplements that may improve health, exercise adaptation, or recovery. Creatine monohydrate may improve: recovery from and adaptation to intense training, recovery from periods of injury with extreme inactivity, cognitive processing, and reduce severity of or enhance recovery from mild traumatic brain injury (mTBI)...
January 18, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29275983/the-association-of-vitamin-d-status-in-lower-extremity-muscle-strains-and-core-muscle-injuries-at-the-national-football-league-combine
#2
Brian J Rebolledo, Johnathan A Bernard, Brian C Werner, Andrea K Finlay, Benedict U Nwachukwu, David M Dare, Russell F Warren, Scott A Rodeo
PURPOSE: To evaluate the association between serum vitamin D level and the prevalence of lower extremity muscle strains and core muscle injuries in elite level athletes at the National Football League (NFL) combine. METHODS: During the 2015 NFL combine, all athletes with available serum vitamin D levels were included for study. Baseline data were collected, including age, race, body mass index, position, injury history specific to lower extremity muscle strain or core muscle injury, and Functional Movement Screen scores...
December 19, 2017: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29239997/predisposing-risk-factors-and-stress-fractures-in-division-i-cross-country-runners
#3
Kaci L Giffin, Kathy B Knight, Martha A Bass, Melinda W Valliant
The purpose of this study was to explore factors associated with increased stress fractures in collegiate cross country runners. Participants in this study were 42 male and female cross country runners at a Division I university. Each athlete completed a questionnaire regarding smoking status, vitamin/mineral intake, previous stress fracture history, birth control usage, menstrual status, and demographic information. Nutritional assessment via a 3-day food record and measurements of whole body, lumbar spine, and hip bone mineral densities (BMD) were also conducted on each athlete...
November 11, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29231753/rates-of-insufficiency-and-deficiency-of-vitamin-d-levels-in-elite-professional-male-and-female-skiers-a-chronobiologic-approach
#4
Jacopo Antonino Vitale, Giovanni Lombardi, Luca Cavaleri, Rosa Graziani, Herbert Schoenhuber, Antonio La Torre, Giuseppe Banfi
Vitamin D is essential for the maintenance and promotion of musculoskeletal health, for the functioning of the immune, cardiovascular and reproductive systems, and its main action is to keep calcium and phosphate plasmatic physiological concentrations at intestinal, renal and bony level. Vitamin D affects several parameters related to physical performance too and a particularly high percentage of vitamin D insufficiency and deficiency in professional athletes has been observed. Several variables are able to impair the synthesis of 25(OH)D in athletes, specifically both genetic and environmental factors, but the most probable explanation for the deficient/insufficient vitamin D levels is the insufficient ultraviolet B light (UVB) exposure during winter...
December 12, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29160809/evaluation-of-dietary-intakes-and-supplement-use-in-paralympic-athletes
#5
Robyn F Madden, Jane Shearer, Jill A Parnell
Dietary intakes and supplement use in Paralympic athletes remains largely unexplored, and specialized recommendations are lacking. The aim of this study was to evaluate nutrient intakes and supplement use in high-performance athletes with physical disabilities using three-day food records and a validated dietary supplement use questionnaire. A secondary aim examined gender differences in nutrient and supplement intakes. Male (n = 18) and female (n = 22) athletes were recruited from nine Paralympic sports through sporting organizations, coaches, and social media...
November 21, 2017: Nutrients
https://www.readbyqxmd.com/read/29156273/contribution-of-sun-exposure-to-the-vitamin-d-dose-received-by-various-groups-of-the-spanish-population
#6
Maria-Antonia Serrano
Although the harmful effects of excessive exposure to solar ultraviolet (UV) radiation are well known, the recommended dose of UV radiation is beneficial for the synthesis of vitamin D by the skin, in addition to being useful in the treatment of various illnesses and mental problems. Numerous studies have shown that vitamin D performs important functions in the human organism, such as absorbing calcium and phosphorous and contributing to the immune system, among others. Several studies have found that a high percentage of various groups of the Spanish population suffer from vitamin D deficiency, and since very few natural foods contain vitamin D, it was considered important to determine whether groups such as schoolchildren, outdoor workers and athletes, receive enough solar radiation to produce adequate levels of vitamin D in their daily activities...
November 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29129460/the-association-of-novel-polymorphisms-with-stress-fracture-injury-in-elite-athletes-further-insights-from-the-sfea-cohort
#7
Ian Varley, David C Hughes, Julie P Greeves, Trent Stellingwerff, Craig Ranson, William D Fraser, Craig Sale
OBJECTIVES: To determine, in conjunction with a wider investigation, whether 11 genetic variants in the vicinity of vitamin D, collagen and Wnt signalling pathways were associated with stress fracture injury in the Stress Fracture Elite Athlete (SFEA) cohort. DESIGN: Genotype-phenotype association study. METHODS: Self-reported stress fracture history and demographic data were recorded in 518 elite athletes, 449 male and 69 female (mean age 24...
November 7, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/29091479/case-study-the-effect-of-nutritional-intervention-on-body-composition-and-physical-performance-of-a-female-squash-player
#8
Christopher Rosimus
The body composition of a squash player may affect athletic performance as carrying excessive body fat may increase injury risk and impair agility and speed. This case study outlines the effect of a nutritional intervention on body composition, vitamin D status and physical performance of a female squash player. A structured, 6-week moderate energy-restricted diet (70-78% of Estimated Energy Requirement (EER) of 2300 kcal was implemented with weekly support. A daily supplement of vitamin D, omega 3 fatty acids, and a multivitamin/multimineral and whey protein was used...
November 1, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29037118/pre-season-dietary-intake-of-professional-soccer-players
#9
Raquel Raizel, Allan da Mata Godois, Audrey Yule Coqueiro, Fabrício Azevedo Voltarelli, Carlos Alexandre Fett, Julio Tirapegui, Fabricio Cesar de Paula Ravagnani, Christianne de Faria Coelho-Ravagnani
BACKGROUND: Despite the well-documented importance of nutrition in optimizing performance and health, the dietary intake of soccer players has attracted little attention. AIM: We aimed to assess the pre-season dietary intake of professional soccer players and its adequacy in macro and micronutrients. METHODS: The pre-season dietary intake of 19 male athletes was assessed using a semi-structured 3-day food record. To determine dietary adequacy and excess, energy and macronutrient intake were compared with the Brazilian dietary reference values for athletes, and micronutrients were compared with the Estimated Average Requirement - EAR (minimum recommendation) and Tolerable Upper Intake Level - UL (maximum recommendation)...
January 1, 2017: Nutrition and Health
https://www.readbyqxmd.com/read/28985103/low-bone-mineral-density-in-male-athletes-is-associated-with-bone-stress-injuries-at-anatomic-sites-with-greater-trabecular-composition
#10
Adam S Tenforde, Allyson L Parziale, Kristin L Popp, Kathryn E Ackerman
BACKGROUND: While sports participation is often associated with health benefits, a subset of athletes may develop impaired bone health. Bone stress injuries (BSIs) are a common overuse injury in athletes; site of injury has been shown to relate to underlying bone health in female athletes. Hypothesis/Purpose: This case series characterizes the association of type of sports participation and anatomic site of BSIs with low bone mineral density (BMD), defined as BMD Z-score <-1.0. Similar to female athletes, it was hypothesized that male athletes who participate in running and sustain BSIs in sites of higher trabecular bone content would be more likely to have low BMD...
October 1, 2017: American Journal of Sports Medicine
https://www.readbyqxmd.com/read/28924423/vegan-diets-practical-advice-for-athletes-and-exercisers
#11
REVIEW
David Rogerson
With the growth of social media as a platform to share information, veganism is becoming more visible, and could be becoming more accepted in sports and in the health and fitness industry. However, to date, there appears to be a lack of literature that discusses how to manage vegan diets for athletic purposes. This article attempted to review literature in order to provide recommendations for how to construct a vegan diet for athletes and exercisers. While little data could be found in the sports nutrition literature specifically, it was revealed elsewhere that veganism creates challenges that need to be accounted for when designing a nutritious diet...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28904935/evaluation-of-dietary-intakes-body-composition-and-cardiometabolic-parameters-in-adolescent-team-sports-elite-athletes-a-cross-sectional-study
#12
Javad Hosseinzadeh, Zahra Maghsoudi, Behnood Abbasi, Pooya Daneshvar, Atefeh Hojjati, Reza Ghiasvand
BACKGROUND: Nutritional intake is an important issue in adolescent athletes. Proper athletes' performance is a multifactorial outcome of good training, body composition, and nutritional status. The aim of the present study was to assess nutritional status, body composition, and cardiometabolic factors in adolescent elite athlete's province of Isfahan, Iran. MATERIALS AND METHODS: In this cross-sectional study, 100 adolescent elite athletes from volleyball, basketball, and soccer teams were selected for the study...
2017: Advanced Biomedical Research
https://www.readbyqxmd.com/read/28855568/plasma-biomarker-proteins-for-detection-of-human-growth-hormone-administration-in-athletes
#13
Sock-Hwee Tan, Albert Lee, Dana Pascovici, Natasha Care, Vita Birzniece, Ken Ho, Mark P Molloy, Alamgir Khan
Human growth hormone (GH) is a naturally occurring hormone secreted by the pituitary gland with anabolic and growth-promoting activities. Since an increased availability of recombinant GH (rGH) for the treatment of GH-deficient patients, GH has been abused in sports and it is prohibited. "GH-isoform" and "biomarkers" tests are currently available for detection of GH abuse in sports, however both methods suffer from shortcomings. Here, we report on a proteomic approach to search for novel protein biomarkers associated with rGH administration in non-elite athletes...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28845832/performance-and-antrhropometric-characteristics-of-elite-rugby-players
#14
Federico Pasin, Barbara Caroli, Valentina Spigoni, Alessandra Dei Cas, Riccardo Volpi, Carlo Galli, Giovanni Passeri
BACKGROUND AND AIM OF THE STUDY: Physical performance is the result of a complex combination of several factors such as genetic and anthropometric aspects, nutrition and hormonal status. In the past few years many studies have considered the impact of vitamin D on muscular strength and athletic performance.The aim of the present study was to assess the anthropometric measures impacting on physical performance in a group of professional rugby athletes.  As a secondary aim we investigated a possible relationship between baseline vitamin D status and athletic performance status in these subjects...
August 23, 2017: Acta Bio-medica: Atenei Parmensis
https://www.readbyqxmd.com/read/28842109/treatment-of-medial-tibial-stress-syndrome-with-radial-soundwave-therapy-in-elite-athletes-current-evidence-report-on-two-cases-and%C3%A2-proposed-treatment-regimen
#15
Amol Saxena, Brian Fullem, Ludger Gerdesmeyer
Two case reports of high-level athletes with medial tibial stress syndrome (MTSS), 1 an Olympian with an actual stress fracture, are presented. Successful treatment included radial soundwave therapy, pneumatic leg braces, relative rest using an antigravity treadmill, and temporary foot orthoses. Radial soundwave therapy has a high level of evidence for treatment of MTSS. We also present recent evidence of the value of vitamin D assessment. Both patients had a successful outcome with minimal downtime. Finally, a suggested treatment regimen for MTSS is presented...
September 2017: Journal of Foot and Ankle Surgery: Official Publication of the American College of Foot and Ankle Surgeons
https://www.readbyqxmd.com/read/28798036/why-don-t-serum-vitamin-d-concentrations-associate-with-bmd-by-dxa-a-case-of-being-bound-to-the-wrong-assay-implications-for-vitamin-d-screening
#16
Richard J Allison, Abdulaziz Farooq, Anissa Cherif, Bruce Hamilton, Graeme L Close, Mathew G Wilson
BACKGROUND: The association between bone mineral density (BMD) and serum25-hydroxyvitamin D (25(OH)D) concentration is weak, particularly in certain races (eg, BlackAfrican vs Caucasian) and in athletic populations. We aimed to examine if bioavailable vitamin D rather than serum 25(OH)D was related to markers of bone health within a racially diverse athletic population. METHODS: In 604 male athletes (Arab (n=327), Asian (n=48), Black(n=108), Caucasian (n=53)and Hispanic (n=68)), we measured total 25(OH)D, vitamin D-binding protein and BMD by DXA...
August 10, 2017: British Journal of Sports Medicine
https://www.readbyqxmd.com/read/28771064/vitamin-d3-supplementation-does-not-improve-sprint-performance-in-professional-rugby-players-a-randomised-placebo-controlled-double-blind-intervention-study
#17
Kirsty A Fairbairn, Ingrid Jm Ceelen, C Murray Skeaff, Claire M Cameron, Tracy L Perry
Vitamin D insufficiency is common in athletes and may lower physical performance. Many cross-sectional studies associate vitamin D status with physical performance in athletes, however there have been few prospective randomised controlled trials with adequate statistical power to test this relationship, and none in the southern hemisphere. Thus, a prospective double blind, randomised placebo-controlled intervention trial was conducted, involving 57 professional rugby union players in New Zealand. Participants were randomised to receive 50,000 IU of cholecalciferol (equivalent to 3,570 IU/day) or placebo once every two weeks over 11-12 weeks...
August 3, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28702900/selected-in-season-nutritional-strategies-to-enhance-recovery-for-team-sport-athletes-a-practical-overview
#18
REVIEW
Lisa E Heaton, Jon K Davis, Eric S Rawson, Ryan P Nuccio, Oliver C Witard, Kimberly W Stein, Keith Baar, James M Carter, Lindsay B Baker
Team sport athletes face a variety of nutritional challenges related to recovery during the competitive season. The purpose of this article is to review nutrition strategies related to muscle regeneration, glycogen restoration, fatigue, physical and immune health, and preparation for subsequent training bouts and competitions. Given the limited opportunities to recover between training bouts and games throughout the competitive season, athletes must be deliberate in their recovery strategy. Foundational components of recovery related to protein, carbohydrates, and fluid have been extensively reviewed and accepted...
November 2017: Sports Medicine
https://www.readbyqxmd.com/read/28696987/nutritional-supplements-for-the-treatment-and-prevention-of-sports-related-concussion-evidence-still-lacking
#19
Thomas H Trojian, David H Wang, John J Leddy
Concussions are common neurologic events that affect many athletes. Very little has been studied on the treatment of concussions with supplements and medications. The U.S. Food and Drug Administration (FDA) reminds us that no supplement has been proven to treat concussions. Many animal studies show that supplements have potential for improving the effects of a brain injury but none have been shown to be of consistent benefit in human studies. Animal studies on severe traumatic brain injury (TBI) may not therefore be applicable transfer to sports-related concussions (SRC)...
July 2017: Current Sports Medicine Reports
https://www.readbyqxmd.com/read/28646812/oral-consumption-of-vitamin-k2-for-8-weeks-associated-with-increased-maximal-cardiac-output-during-exercise
#20
RANDOMIZED CONTROLLED TRIAL
Brian K McFarlin, Andrea L Henning, Adam S Venable
Background • Vitamin K1 and K2 are not typically common in a Western diet because they are found in a variety of fermented foods. Vitamin K2 in particular has been demonstrated to restore mitochondrial function and has a key role in production of mitochondrial adenosine triphosphate. Thus, it is reasonable to speculate that dietary supplementation with vitamin K2 could increase the function of muscle with high mitochondrial content (ie, skeletal and cardiac muscle). Objective • The purpose of this study was to determine if 8 wk of dietary supplementation with Vitamin K2 could alter cardiovascular responses to a graded cycle ergometer test...
July 2017: Alternative Therapies in Health and Medicine
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