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Athlete, performance, nutrition

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https://www.readbyqxmd.com/read/27904629/effect-of-various-kinds-of-beverages-on-stress-oxidative-f2-isoprostane-serum-lipid-and-blood-glucose-of-elite-taekwondo-players
#1
Zahra Maghsoudi, Ashfin Shiranian, Gholamreza Askai, Reza Ghaisvand
BACKGROUND: Athletes' recovery is important in improving their performance. Nutritional strategies can be effective in enhancing recovery rate. Choosing the best food items in appropriate intervals can play effective roles in resynthesis of fuels and recovery of muscle injury. Beverage micro and macronutrient content are helpful in fuel restoration. In this study, we assess the effects of various kinds of beverages on oxidative stress, muscle injury, and metabolic risk factors in taekwondo players...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27895900/nutritional-implications-for-ultra-endurance-walking-and-running-events
#2
REVIEW
Eric Williamson
This paper examines the various nutritional challenges which athletes encounter in preparing for and participating in ultra-endurance walking and running events. Special attention is paid to energy level, performance, and recovery within the context of athletes' intake of carbohydrate, protein, fat, and various vitamins and minerals. It outlines, by way of a review of literature, those factors which promote optimal performance for the ultra-endurance athlete and provides recommendations from multiple researchers concerned with the nutrition and performance of ultra-endurance athletes...
2016: Extreme Physiology & Medicine
https://www.readbyqxmd.com/read/27872757/sports-nutrition-knowledge-among-mid-major-division-i-university-student-athletes
#3
Ashley Andrews, Janet R Wojcik, Joni M Boyd, Charles J Bowers
Competitive athletes have goals to optimize performance and to maintain healthy body composition. Sports nutrition is a component of training programs often overlooked by student-athletes and their coaches. The purpose of this study was to examine student-athletes' sports nutrition knowledge across sex, class level, team, and completion of prior nutrition coursework. Participants included 123 mid-major Division I university student-athletes (47 females and 76 males) from baseball, softball, men's soccer, track and field, and tennis...
2016: Journal of Nutrition and Metabolism
https://www.readbyqxmd.com/read/27861911/metabolism-of-ketone-bodies-during-exercise-and-training-physiological-basis-for-exogenous-supplementation
#4
Mark Evans, Karl E Cogan, Brendan Egan
Optimising training and performance through nutrition strategies is central to supporting elite sportspeople, much of which has focussed on manipulating the relative intake of carbohydrate and fat and their contributions as fuels for energy provision. The ketone bodies, namely acetoacetate, acetone, and β-hydroxybutyrate (βHB), are produced in the liver during conditions of reduced carbohydrate availability and serve as an alternative fuel source for peripheral tissues including brain, heart and skeletal muscle...
November 10, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27858306/menthol-a-fresh-ergogenic-aid-for-athletic-performance
#5
Christopher J Stevens, Russ Best
The application of menthol has recently been researched as a performance-enhancing aid for various aspects of athletic performance including endurance, speed, strength and joint range of motion. A range of application methods has been used including a mouth rinse, ingestion of a beverage containing menthol or external application to the skin or clothing via a gel or spray. The majority of research has focussed on the use of menthol to impart a cooling sensation on athletes performing endurance exercise in the heat...
November 17, 2016: Sports Medicine
https://www.readbyqxmd.com/read/27837349/comparison-of-body-composition-and-nutrients-deficiencies-between-portuguese-rink-hockey-players
#6
Maria-Raquel G Silva, Hugo-Henrique Silva
: We evaluated dietary intake and body composition of child and adolescent rink-hockey players and controls. Seventy-two male rink-hockey players (38 children and 34 adolescents) and 79 male controls (43 children and 36 adolescents) were evaluated in order to collect training data, detailed dietary intake and body composition. Rink-hockey players presented significantly lower body fat (BF) and higher fat-free mass (FFM) than controls. Mean intakes of carbohydrate and protein were considered to be adequate, but mean intakes of fat were above the recommended levels in athletes...
November 12, 2016: European Journal of Pediatrics
https://www.readbyqxmd.com/read/27824059/vitamin-d-deficiency-in-individuals-with-a-spinal-cord-injury-a-literature-review
#7
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/27806009/tapering-practices-of-croatian-open-class-powerlifting-champions
#8
Jozo Grgic, Pavle Mikulic
The aim of this study was to explore tapering practices among 10 Croatian open-class powerlifting champions (mean ± SD: age 29.2 ± 3.2 years; Wilks coefficient 355.1 ± 54.8). The athletes were interviewed about their tapering practices using a semi-structured interview, after which the audio content was transcribed. The athletes reported decreasing training volume during the taper by 50.5 ± 11.7% using a step type or an exponential type of taper with a fast decay. Training intensity was maintained or increased during the taper, and it reached its highest values 8 ± 3 days before the competition...
October 27, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27798441/runner-s-diarrhea-what-is-it-what-causes-it-and-how-can-it-be-prevented
#9
Erick P de Oliveira
PURPOSE OF REVIEW: Runner's diarrhea is an acute exercise-induced diarrhea. Usually, this is not a pathological situation but it can affect performance. This review focuses on the discussion of the main causes of runner's diarrhea and nutritional recommendations to prevent it. RECENT FINDINGS: Although based on limited data, multiple transportable carbohydrate intake during exercise instead of glucose alone can be recommended for preventing the urge to defecate and (possibly) diarrhea...
October 27, 2016: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/27789774/post-exercise-muscle-glycogen-resynthesis-in-humans
#10
Louise M Burke, Luc J C van Loon, John A Hawley
Since the pioneering studies conducted in the 1960s in which glycogen status was investigated utilizing the muscle biopsy technique, sports scientists have developed a sophisticated appreciation of the role of glycogen in cellular adaptation and exercise performance, as well as sites of storage of this important metabolic fuel. While sports nutrition guidelines have evolved during the past decade to incorporate sport-specific and periodized manipulation of carbohydrate (CHO) availability, athletes attempt to maximise muscle glycogen synthesis between important workouts or competitive events so that fuel stores closely match to the demands of the prescribed exercise...
October 27, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27777542/gender-differences-and-access-to-a-sports-dietitian-influence-dietary-habits-of-collegiate-athletes
#11
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/27754418/dietary-intake-of-athletes-seeking-nutrition-advice-at-a-major-international-competition
#12
Sarah J Burkhart, Fiona E Pelly
International travel and short-term residence overseas is now a common feature of an elite athlete's competition schedule, however, food choice away from home may be challenging and potentially impact on performance. Guidelines for dietary intake specific to competition exist for athletes, however, there is little evidence available to ascertain if athletes meet these recommendations during competition periods, particularly when food is provided in-house. During the Delhi 2010 Commonwealth Games, dietitians based in the dining hall recorded 24 h dietary recalls with all athletes who visited the nutrition kiosk...
October 14, 2016: Nutrients
https://www.readbyqxmd.com/read/27751748/-intensive-training-and-menstrual-disorders-in-young-female-impact-on-bone-mass
#13
L Maïmoun, F Paris, O Coste, C Sultan
Participation in recreational physical activity is widely acknowledged to provide significant health benefits. Conversely, intense training imposes several constraints, such as intermittent or chronic metabolic and psychogenic training stressors and maintenance of very low body fat to maximize performance. Adolescent and adult athletic women are therefore at risk of overtraining and/or poor dietary intake, which may have several consequences for endocrine function particularly on hypothalamic-pituitary-gonadal axis...
October 14, 2016: Gynécologie, Obstétrique & Fertilité
https://www.readbyqxmd.com/read/27747779/prevalence-and-impact-of-anemia-on-basic-trainees-in-the-us-air-force
#14
Kathryn E Myhre, Bryant J Webber, Thomas L Cropper, Juste N Tchandja, Dale M Ahrendt, Christopher A Dillon, Roy W Haas, Samantha L Guy, Mary T Pawlak, Susan P Federinko
BACKGROUND: Anemia has been implicated in adverse health outcomes of athletes and military trainees, ranging from overuse injuries to degraded physical and cognitive performance. The purpose of this study was to investigate prevalence of anemia among US Air Force (USAF) basic trainees, to compare physical performance and discharge rates between anemic and non-anemic trainees, and to determine the risks and relative risks of being discharged for anemic versus non-anemic women and men. METHODS: All USAF basic trainees were screened for anemia between July 2013 and January 2014, during an 8-week basic training course at Joint Base San Antonio-Lackland, TX...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27710165/dietary-intake-body-composition-and-nutrition-knowledge-of-australian-football-and-soccer-players-implications-for-sports-nutrition-professionals-in-practice
#15
Brooke L Devlin, Michael D Leveritt, Michael Kingsley, Regina Belski
Sports nutrition professionals aim to influence nutrition knowledge, dietary intake and body composition to improve athletic performance. Understanding the interrelationships between these factors and how they vary across sports has the potential to facilitate better-informed and targeted sports nutrition practice. This observational study assessed body composition (DXA), dietary intake (multiple-pass 24-hour recall) and nutrition knowledge (two previously validated tools) of elite and sub-elite male players involved in two team-based sports; Australian football (AF) and soccer...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27710146/high-prevalence-of-dehydration-and-inadequate-nutritional-knowledge-among-university-and-club-level-athletes
#16
Pamela J Magee, Alison M Gallagher, Jacqueline M McCormack
Although dehydration of ≥2% body weight (BW) loss significantly impairs endurance performance, dehydration remains prevalent among athletes and may be owing to a lack of knowledge in relation to fluid requirements. The aim of this study was to assess the hydration status of university/club level athletes (n=430) from a range of sports/activities (army officer cadet training; bootcamp training; cycling; Gaelic Athletic Association camogie, football and hurling; golf; hockey; netball; rugby; running (sprinting and endurance); Shotokan karate and soccer) immediately before and after training/competition and to assess their nutritional knowledge...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27677364/contribution-of-branched-chain-amino-acids-to-purine-nucleotide-cycle-a-pilot-study
#17
F-C Tang, C-C Chan
BACKGROUND/OBJECTIVES: Branched-chain amino acids (BCAAs) and purine nucleotide cycle (PNC) are both associated with energy metabolism. The purpose of this study was to explore the influences of BCAA supplementation on the PNC activity of male athletes in response to a bout of endurance running exercise. SUBJECTS/METHODS: Twelve male athletes (20.3±1.4 years) participated in the study. Each of the athletes received 12 g of a BCAA supplement (leucine 54%, isoleucine 19% and valine 27%) per day during the study...
September 28, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27649242/a-systematic-review-of-athletes-and-coaches-nutrition-knowledge-and-reflections-on-the-quality-of-current-nutrition-knowledge-measures
#18
REVIEW
Gina L Trakman, Adrienne Forsyth, Brooke L Devlin, Regina Belski
CONTEXT: Nutrition knowledge can influence dietary choices and impact on athletic performance. Valid and reliable measures are needed to assess the nutrition knowledge of athletes and coaches. OBJECTIVES: (1) To systematically review the published literature on nutrition knowledge of adult athletes and coaches and (2) to assess the quality of measures used to assess nutrition knowledge. DATA SOURCES: MEDLINE, CINAHL, SPORTDiscuss, Web of Science, and SCOPUS...
September 16, 2016: Nutrients
https://www.readbyqxmd.com/read/27615123/nutritional-supplement-use-by-dutch-elite-and-sub-elite-athletes-does-receiving-dietary-counselling-make-a-difference
#19
Floris C Wardenaar, Ingrid Jm Ceelen, Jan-Willem Van Dijk, Roland Wj Hangelbroek, Lore Van Roy, Britte Van der Pouw, Jeanne Hm De Vries, Marco Mensink, Renger F Witkamp
The use of nutritional supplements is highly prevalent among athletes. In this cross-sectional study we assessed the prevalence of nutritional supplement use by a large group of Dutch competitive athletes in relation to dietary counselling. A total of 778 athletes (407 males and 371 females) completed a web-based questionnaire about the use of nutritional supplements. Log-binomial regression models were applied to estimate crude and adjusted prevalence ratios (PR) for the use of individual nutritional supplements in athletes receiving dietary counselling as compared to athletes not receiving dietary counselling...
September 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27556488/comparison-of-watermelon-and-carbohydrate-beverage-on-exercise-induced-alterations-in-systemic-inflammation-immune-dysfunction-and-plasma-antioxidant-capacity
#20
R Andrew Shanely, David C Nieman, Penelope Perkins-Veazie, Dru A Henson, Mary P Meaney, Amy M Knab, Lynn Cialdell-Kam
Consuming carbohydrate- and antioxidant-rich fruits during exercise as a means of supporting and enhancing both performance and health is of interest to endurance athletes. Watermelon (WM) contains carbohydrate, lycopene, l-citrulline, and l-arginine. WM may support exercise performance, augment antioxidant capacity, and act as a countermeasure to exercise-induced inflammation and innate immune changes. Trained cyclists (n = 20, 48 ± 2 years) participated in a randomized, placebo controlled, crossover study...
August 22, 2016: Nutrients
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