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https://www.readbyqxmd.com/read/27928206/doping-attitudes-and-covariates-of-potential-doping-behaviour-in-high-level-team-sport-athletes-gender-specific-analysis
#1
Damir Sekulic, Enver Tahiraj, Milan Zvan, Natasa Zenic, Ognjen Uljevic, Blaz Lesnik
Team sports are rarely studied with regard to doping behaviour and doping-related factors regardless of their global popularity. This study aimed to investigate doping factors and covariates of potential doping behaviour in high-level team-sport athletes. The subjects were 457 high-performing, national- and international-level athletes (21.9 ± 3.4 years of age; 179 females) involved in volleyball (n = 77), soccer (n = 163), basketball (n = 114) and handball (n = 103). Previously validated self-administered questionnaires aimed at evidencing sport factors, doping-related factors, knowledge on sport nutrition and doping, and attitudes to performance enhancement were used...
December 2016: Journal of Sports Science & Medicine
https://www.readbyqxmd.com/read/27923448/fit-with-good-fat-the-role-of-n-3-polyunsaturated-fatty-acids-on-exercise-performance
#2
REVIEW
Mariasole Da Boit, Angus M Hunter, Stuart R Gray
N-3 PUFA (n-3) polyunsaturated fatty acids (PUFA) are a family of fatty acids mainly found in oily fish and fish oil supplements. The effects of n-3 PUFA on health are mainly derived from its anti-inflammatory proprieties and its influence on immune function. Lately an increased interest in n-3 PUFA supplementation has reached the world of sport nutrition, where the majority of athletes rely on nutrition strategies to improve their training and performance. A vast amount of attention is paid in increasing metabolic capacity, delaying the onset of fatigue, and improving muscle hypertrophy and neuromuscular function...
January 2017: Metabolism: Clinical and Experimental
https://www.readbyqxmd.com/read/27900167/scat2-and-scat3-scores-at-baseline-and-after-sports-related-mild-brain-injury-concussion-qualitative-synthesis-with-weighted-means
#3
Roger E Thomas, Jorge Alves, Marcus M Vaska, Rosana Magalhães
OBJECTIVE: Identify all Sport Concussion Assessment Tool (SCAT2/3) studies, compare baseline and postconcussion results. DESIGN: Systematic review (qualitative synthesis, weighted means). DATA SOURCES: 18 databases, 9 grey literature resources searched for SCAT2/3 data; 9150 articles identified, titles/abstracts assessed/data-entry independently by two reviewers. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Any studies reporting partial/complete SCAT2/3 data...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27895542/effect-of-tart-cherry-juice-on-recovery-and-next-day-performance-in-well-trained-water-polo-players
#4
Rachel McCormick, Peter Peeling, Martyn Binnie, Brian Dawson, Marc Sim
BACKGROUND: Tart Montmorency cherries contain high concentrations of phytochemicals and anthocyanins, which have recently been linked to improved athletic recovery and subsequent performance. To date however, previous work reporting promising results has focused on land-based endurance sports, with any potential benefits to team sports remaining unknown. As such, this investigation set-out to examine the effect of supplemental tart cherry juice (CJ) on recovery and next day athletic performance in highly-trained water-based team sport athletes over seven days...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27888818/high-altitude-illness
#5
Anna Hartman-Ksycińska, Jolanta Kluz-Zawadzka, Bogumił Lewandowski
High-altitude illness is a result of prolonged high-altitude exposure of unacclimatized individuals. The illness is seen in the form of acute mountain sickness (AMS) which if not treated leads to potentially life-threatening high altitude pulmonary oedema and high-altitude cerebral oedema. Medical problems are caused by hypobaric hypoxia stimulating hypoxia-inducible factor (HIF) release. As a result, the central nervous system, circulation and respiratory system function impairment occurs. The most important factor in AMS treatment is acclimatization, withdrawing further ascent and rest or beginning to descent; oxygen supplementation, and pharmacological intervention, and, if available, a portable hyperbaric chamber...
2016: Przegla̧d Epidemiologiczny
https://www.readbyqxmd.com/read/27882605/placebo-in-sports-nutrition-a-proof-of-principle-study-involving-caffeine-supplementation
#6
B Saunders, L F de Oliveira, R P da Silva, V de Salles Painelli, L S Gonçalves, G Yamaguchi, T Mutti, E Maciel, H Roschel, G G Artioli, B Gualano
We investigated the effects of supplement identification on exercise performance with caffeine supplementation. Forty-two trained cyclists (age 37 ± 8 years, body mass [BM] 74.3 ± 8.4 kg, height 1.76 ± 0.06 m, maximum oxygen uptake 50.0 ± 6.8 mL/kg/min) performed a ~30 min cycling time-trial 1 h following either 6 mg/kgBM caffeine (CAF) or placebo (PLA) supplementation and one control (CON) session without supplementation. Participants identified which supplement they believed they had ingested ("caffeine", "placebo", "don't know") pre- and post-exercise...
November 23, 2016: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/27856133/have-prohibition-policies-made-the-wrong-decision-a-critical-review-of-studies-investigating-the-effects-of-dmaa
#7
Matthew Dunn
In June 2012 DMAA (1,3-dimethylamylamine), an ephedrine-like vasoconstricting substance which had been included in many popular sports supplements, became a scheduled substance in Australia, following bans in several other countries. The underlying rationale for this ban was that DMAA use is unsafe. This paper aimed to critically review the available evidence on the acute and/or long-term harms of DMAA. Using five research databases (PubMed, Embase, ProQuest Health and Medical Complete, and Web of Science) and the key terms 'methylhexaneamine', 'DMAA', 'dimethylamylamine', '1,3-dimethylpentylamine' and '2-amino-4-methylhexane', 842 articles were identified once duplicates removed...
November 14, 2016: International Journal on Drug Policy
https://www.readbyqxmd.com/read/27852613/vitamin-c-enriched-gelatin-supplementation-before-intermittent-activity-augments-collagen-synthesis
#8
Gregory Shaw, Ann Lee-Barthel, Megan Lr Ross, Bing Wang, Keith Baar
BACKGROUND: Musculoskeletal injuries are the most common complaint in active populations. More than 50% of all injuries in sports can be classified as sprains, strains, ruptures, or breaks of musculoskeletal tissues. Nutritional and/or exercise interventions that increase collagen synthesis and strengthen these tissues could have an important effect on injury rates. OBJECTIVE: This study was designed to determine whether gelatin supplementation could increase collagen synthesis...
November 16, 2016: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27824059/vitamin-d-deficiency-in-individuals-with-a-spinal-cord-injury-a-literature-review
#9
REVIEW
J L Flueck, C Perret
STUDY DESIGN: Literature review of studies investigating vitamin D status in individuals with a spinal cord injury (SCI). OBJECTIVES: Prevalence of vitamin D deficiency seems to be high in the general population. Little is known regarding such a deficiency in individuals with a SCI. This review aimed to examine the literature that investigated vitamin D status in this population. SETTING: Switzerland. METHODS: A literature review was performed to investigate the prevalence of vitamin D deficiency in individuals with a SCI and to determine the factors leading to deficiency...
November 8, 2016: Spinal Cord
https://www.readbyqxmd.com/read/27822169/the-effect-of-six-days-of-dietary-nitrate-supplementation-on-performance-in-trained-crossfit-athletes
#10
Samuel J Kramer, Daniel A Baur, Maria T Spicer, Matthew D Vukovich, Michael J Ormsbee
BACKGROUND: While it is well established that dietary nitrate reduces the metabolic cost of exercise, recent evidence suggests this effect is maintained 24 h following the final nitrate dose when plasma nitrite levels have returned to baseline. In addition, acute dietary nitrate was recently reported to enhance peak power production. Our purpose was to examine whether chronic dietary nitrate supplementation enhanced peak power 24 h following the final dose and if this impacted performance in a heavily power-dependent sport...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27818322/an-overview-of-herb-and-dietary-supplement-efficacy-safety-and-government-regulations-in-the-united-states-with-suggested-improvements-part-1-of-5-series
#11
REVIEW
Amy Christine Brown
This is the first of five review articles investigating dietary supplements (DS; includes herbs) that now exceed over 50,000 in the Office of Dietary Supplement's "Dietary Supplement Label Database." Four review articles follow summarizing published medical case reports of DS related to liver toxicity, kidney toxicity, heart toxicity, and cancer. The most popular DS were vitamin or mineral supplements (43%) followed by specialty supplements (20%), botanicals (herbs; 20%), and sports supplements (16%). The 2013 Annual Report of the American Association of Poison Control Centers revealed 1692 fatalities due to drugs and zero deaths due to DS...
November 3, 2016: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/27796913/self-administration-of-medicines-and-dietary-supplements-among-female-amateur-runners-a-cross-sectional-analysis
#12
Médéa Locquet, Charlotte Beaudart, Robert Larbuisson, Victoria Leclercq, Fanny Buckinx, Jean-François Kaux, Jean-Yves Reginster, Olivier Bruyère
INTRODUCTION: Self-administration of medicines or dietary supplements without any physician's advice is a widespread behavior and appears to be more frequently practiced by women. Moreover, reasons to self-administer products are often pains and injuries especially among athletes who might also use remedies to improve physical performance. The objective of this study was thus to assess the prevalence of self-administration of medicines and dietary supplements as well as its determinants among female amateur runners...
October 31, 2016: Advances in Therapy
https://www.readbyqxmd.com/read/27796189/cervical-traction-for-managing-neck-pain-a-survey-of-physical-therapists-in-the-united-states
#13
Timothy J Madson, John H Hollman
Study Design Cross-sectional survey. Background Systematic reviews provide little support for traction in managing neck pain. While traction usage among physical therapists (PTs) in other countries has been described, usage in the United States has not been examined. Objective To examine how PTs use traction for patients with neck pain, when traction is used, delivery modes and parameters, supplemental interven¬tions, and whether professional demographics influence usage. Methods We surveyed a random sample of 4000 Orthopaedic Section members of the American Physical Therapy Association...
October 30, 2016: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/27777542/gender-differences-and-access-to-a-sports-dietitian-influence-dietary-habits-of-collegiate-athletes
#14
Michael V Hull, Andrew R Jagim, Jonathan M Oliver, Mike Greenwood, Deanna R Busteed, Margaret T Jones
BACKGROUND: Limited research exists on the effect of a sports dietitian (SD) on athletes' dietary habits and nutrient periodization, which is the deliberate manipulation of macronutrient intake to match training goals. Further, the difference in dietary habits between men and women collegiate athletes has been understudied. A survey questionnaire examining dietary habits and practices was administered to athletes at two universities that employed a full time SD. Not all athletes used the SD as their primary source for nutritional guidance...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/27777094/dietary-nitrate-supplementation-improves-sprint-and-high-intensity-intermittent-running-performance
#15
Christopher Thompson, Anni Vanhatalo, Harry Jell, Jonathan Fulford, James Carter, Lara Nyman, Stephen J Bailey, Andrew M Jones
: The influence of dietary nitrate (NO3(-)) supplementation on indices of maximal sprint and intermittent exercise performance is unclear. PURPOSE: To investigate the effects of NO3(-) supplementation on sprint running performance, and cognitive function and exercise performance during the sport-specific Yo-Yo Intermittent Recovery level 1 test (IR1). METHODS: In a double-blind, randomised, crossover study, 36 male team-sport players received NO3(-)-rich (BR; 70 mL·day(-1); 6...
October 21, 2016: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/27757290/bipartite-patella-in-35-year-old-fitness-instructor-a-case-report
#16
Sebastian Zabierek, Jakub Zabierek, Adam Kwapisz, Marcin E Domzalski
BACKGROUND AND PURPOSE: The patella plays an important role in knee biomechanics and provides anterior coverage of the knee joint. One to two percent of the population has an anatomical variant of patella called a bipartite patella that usually does not case pain. However, occasionally after injury or overuse during sport it can be a source of anterior knee pain. The purpose of this case report was to present a rare variant of bipartite patella and highlight conservative treatment of this condition...
October 2016: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/27732767/a-review-of-designer-anabolic-steroids-in-equine-sports
#17
Christopher C Waller, Malcolm D McLeod
In recent years the potential for anabolic steroid abuse in equine sports has increased due to the growing availability of "designer steroids". These compounds are readily accessible online in "dietary" or "nutritional" supplements and contain steroidal compounds which have never been tested or approved as veterinary agents. They typically have unusual structures or substitution and as a result may pass undetected through current anti-doping screening protocols, making them a significant concern for the integrity of the industry...
October 12, 2016: Drug Testing and Analysis
https://www.readbyqxmd.com/read/27732653/seasonal-vitamin-d-status-in-polish-elite-athletes-in-relation-to-sun-exposure-and-oral-supplementation
#18
Jaroslaw Krzywanski, Tomasz Mikulski, Hubert Krysztofiak, Marcel Mlynczak, Ewa Gaczynska, Andrzej Ziemba
Vitamin D does not only influence the musculoskeletal health and mineral homeostasis but it also affects cardiovascular, endocrine, nervous, immune and mental functions, thus it is of considerable importance for both physically active people and elite athletes. However, vitamin D deficiency is common worldwide and results from inadequate endogenous skin synthesis (insufficient ultraviolet B exposure) and diet. To improve the vitamin D status elite athletes often travel to lower latitude during winter. The aim of the study was to evaluate the seasonal vitamin D status in Polish elite athletes according to the sun exposure and oral supplementation...
2016: PloS One
https://www.readbyqxmd.com/read/27729185/control-of-antioxidant-supplementation-through-interview-is-not-appropriate-in-oxidative-stress-sport-studies-analytical-confirmation-should-be-required
#19
Yaira Barranco-Ruiz, Jeronimo Aragón-Vela, Cristina Casals, Antonio Martínez-Amat, Rafael A Casuso, Jesus R Huertas
OBJECTIVE: Controlling antioxidant supplementation in athletes involved in studies related to oxidative stress and muscle damage is the key to ensure results. The aim of this study was to confirm through high-performance liquid chromatography (HPLC) analysis whether well-trained individuals lied during a personal interview when asked if they were taking supplements with antioxidants, and how this could affect oxidative stress, muscle damage, and antioxidant response. METHODS: A total of 94 men, well trained in endurance sports, volunteered in this study...
January 2017: Nutrition
https://www.readbyqxmd.com/read/27691998/characterisation-of-equine-satellite-cell-transcriptomic-profile-response-to-%C3%AE-hydroxy-%C3%AE-methylbutyrate-hmb
#20
Katarzyna A Szcześniak, Anna Ciecierska, Piotr Ostaszewski, Tomasz Sadkowski
β-Hydroxy-β-methylbutyrate (HMB) is a popular ergogenic aid used by human athletes and as a supplement to sport horses, because of its ability to aid muscle recovery, improve performance and body composition. Recent findings suggest that HMB may stimulate satellite cells and affect expressions of genes regulating skeletal muscle cell growth. Despite the scientific data showing benefits of HMB supplementation in horses, no previous study has explained the mechanism of action of HMB in this species. The aim of this study was to reveal the molecular background of HMB action on equine skeletal muscle by investigating the transcriptomic profile changes induced by HMB in equine satellite cells in vitro...
October 2016: British Journal of Nutrition
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