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Carbohydrate consumption in athletes

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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/27618089/the-diet-quality-of-competitive-adolescent-male-rugby-union-players-with-energy-balance-estimated-using-different-physical-activity-coefficients
#2
Tracy Burrows, Simon K Harries, Rebecca L Williams, Cheryl Lum, Robin Callister
OBJECTIVES: The aims of the current study were to comprehensively assess the dietary intakes and diet quality of a sample of Australian competitive adolescent rugby union players and compare these intakes with National and Sports Dietitians Association (SDA) Recommendations for adolescent athletes. A secondary aim investigated applying different physical activity level (PAL) coefficients to determine total energy expenditure (TEE) in order to more effectively evaluate the adequacy of energy intakes...
2016: Nutrients
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
#3
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
https://www.readbyqxmd.com/read/27455598/-daily-calorie-and-macronutrient-consumption-in-girls-of-different-somatotypes-with-different-shares-of-body-fat-muscle-and-bone-components
#4
V V Fefelova, Yu A Fefelova, T P Koloskova, T V Kazakova, E Yu Sergeeva
211 practically healthy girls, the students of Krasnoyarsk Medical University in the ages of 16 to 20 years, have been examined. We determined their somatotypes (euriplastic, athletic, subathletic and stenoplastic) and body composition (fat, muscle, bone component). Actual nutrition in these subjects was studied by the method. of 24-hour nutrition recall involving foodstuffs models. Energy consumption in cohorts with different somatotypes did not differ from one another and ranged from 1880 to 2115 kilocalories per day, that corresponded to normal physiological needs in women of this age with the coefficient of physical activity as 1...
2016: Voprosy Pitaniia
https://www.readbyqxmd.com/read/27329516/nighttime-feeding-likely-alters-morning-metabolism-but-not-exercise-performance-in-female-athletes
#5
Michael J Ormsbee, Katherine A Gorman, Elizabeth A Miller, Daniel A Baur, Lisa A Eckel, Robert J Contreras, Lynn B Panton, Maria T Spicer
The timing of morning endurance competition may limit proper pre-race fueling and resulting performance. A nighttime, pre-sleep nutritional strategy could be an alternative method to target the metabolic and hydrating needs of the early morning athlete without compromising sleep or gastrointestinal comfort during exercise. Therefore, the purpose of this investigation was to examine the acute effects of pre-sleep chocolate milk (CM) ingestion on next-morning running performance, metabolism, and hydration status...
July 2016: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/27232559/a-case-study-on-the-effect-of-professional-dietary-counseling-elite-basketball-players-eat-healthier-during-competition-days
#6
Anastasia Tsoufi, Maria I Maraki, Leonidas Dimitrakopoulos, Konstantinos Famisis, Maria G Grammatikopoulou
BACKGROUND: Literature suggests that dietary intake of elite athletes may differ between training and competition days. In addition, despite the importance of nutrition in sports and the popularity of basketball, studies on the diet of basketball players are scarce. Therefore, the aim of the present study was to assess dietary intake and diet quality in training and competition days in a team of elite basketball players receiving daily professional nutritional counseling. METHODS: One elite basketball team (15 players) participating in Euroleague volunteered for the study...
May 27, 2016: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/27042167/critical-evaluation-of-food-intake-and-energy-balance-in-young-modern-pentathlon-athletes-a-cross-sectional-study
#7
Leticia Azen Alves Coutinho, Cristiana Pedrosa Melo Porto, Anna Paola Trindade Rocha Pierucci
BACKGROUND: Modern pentathlon comprises five sports: fencing, swimming, equestrian jumping, and a combined event of pistol shooting and running. Despite the expected high energy demand of this sport, there are few studies that provide support for the nutritional recommendations for pentathletes. The purpose of the present study was to evaluate young modern pentathlon athletes with respect to body composition, biochemical profile, and consumption of food and supplements. METHODS: Fifty-six young modern pentathletes aged 13...
2016: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/26918583/gluconeogenesis-during-endurance-exercise-in-cyclists-habituated-to-a-long-term-low-carbohydrate-high-fat-diet
#8
Christopher C Webster, Timothy D Noakes, Shaji K Chacko, Jeroen Swart, Tertius A Kohn, James A H Smith
KEY POINTS: Blood glucose is an important fuel for endurance exercise. It can be derived from ingested carbohydrate, stored liver glycogen and newly synthesized glucose (gluconeogenesis). We hypothesized that athletes habitually following a low carbohydrate high fat (LCHF) diet would have higher rates of gluconeogenesis during exercise compared to those who follow a mixed macronutrient diet. We used stable isotope tracers to study glucose production kinetics during a 2 h ride in cyclists habituated to either a LCHF or mixed macronutrient diet...
August 1, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/26664337/nutritional-behaviour-and-beliefs-of-ski-mountaineers-a-semi-quantitative-and-qualitative-study
#9
COMPARATIVE STUDY
Caroline Praz, Mélanie Granges, Céline Burtin, Bengt Kayser
BACKGROUND: Endurance athletes are advised to optimize nutrition prior to races. Little is known about actual athletes' beliefs, knowledge and nutritional behaviour. We monitored nutritional behaviour of amateur ski-mountaineering athletes during 4 days prior to a major competition to compare it with official recommendations and with the athletes' beliefs. METHODS: Participants to the two routes of the 'Patrouille des Glaciers' were recruited (A, 26 km, ascent 1881 m, descent 2341 m, max altitude 3160 m; Z, 53 km, ascent 3994 m, descent 4090 m, max altitude 3650 m)...
2015: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/26634839/immunological-aspects-of-sport-nutrition
#10
REVIEW
Michael Gleeson
Prolonged bouts of exercise and heavy training regimens are associated with depression of immune system functions that can increase the risk of picking up opportunistic infections such as the common cold and influenza. Some common sport nutrition practices including high-carbohydrate diets and carbohydrate ingestion during exercise, training with low-glycogen stores, intentional dieting for weight loss, ingestion of high-dose antioxidant supplements and protein ingestion post exercise may influence immune system status in athletes...
February 2016: Immunology and Cell Biology
https://www.readbyqxmd.com/read/26545647/-energy-and-macronutrient-intake-in-female-athletes
#11
Laura Bernad Asencio, Manuel Reig García-Galbis
UNLABELLED: Objetive: to determine the adequate intake of macronutrients to improve the nutritional status of women athletes and their sports performance. METHODS: a search was performed in four databases: EBSCO, Proquest, Pubmed and OvidSP, using the keywords "protein intake" AND "athletes", "endurance athletes" AND "nutrition". SELECTION CRITERIA: original articles about protein intake in female athletes, published between 2009 and 2014, and whose source are indexed scientific journals...
2015: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/26492102/observed-dietary-practices-of-recreational-ultraendurance-cyclists-in-the-heat
#12
Laura J Kunces, Evan C Johnson, Colleen X Munoz, Jay R Hydren, Robert A Huggins, Daniel A Judelson, Mathew S Ganio, Jakob L Vingren, Jeff S Volek, Lawrence E Armstrong
Kunces, LJ, Johnson, EC, Munoz, CX, Hydren, JR, Huggins, RA, Judelson, DA, Ganio, MS, Vingren, JL, Volek, JS, and Armstrong, LE. Observed dietary practices of recreational ultraendurance cyclists in the heat. J Strength Cond Res 30(6): 1607-1612, 2016-Dietary approaches for optimizing exercise performance have been debated in the literature for years. For endurance athletes, various position stands focus on recommendations for high-carbohydrate diets to maximize performance in events. However, theories of low-carbohydrate diets and their ability to provide more fuel may prove beneficial to ultraendurance athletes...
June 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/26251549/room-for-improvement-in-nutrition-knowledge-and-dietary-intake-of-male-football-soccer-players-in-australia
#13
Michael C Andrews, Catherine Itsiopoulos
Athletes require sufficient nutrition knowledge and skills to enable appropriate selection and consumption of food and fluids to meet their health, body composition, and performance needs. This article reports the nutrition knowledge and dietary habits of male football (soccer) players in Australia. Players age 18 years and older were recruited from 1 A-League club (professional) and 4 National Premier League clubs (semiprofessional). No significant difference in general nutrition knowledge (GNK; 54.1% ± 13...
February 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/25979566/the-effect-of-a-whey-protein-supplement-dose-on-satiety-and-food-intake-in-resistance-training-athletes
#14
RANDOMIZED CONTROLLED TRIAL
Kristen L MacKenzie-Shalders, Nuala M Byrne, Gary J Slater, Neil A King
OBJECTIVE: Many athletes perform resistance training and consume dietary protein as a strategy to promote anabolic adaptation. Due to its high satiety value, the regular addition of supplemented dietary protein could plausibly displace other key macronutrients such as carbohydrate in an athlete's diet. This effect will be influenced by the form and dose of protein. Therefore, this study assessed the impact of liquid whey protein dose manipulation on subjective sensations of appetite and food intake in a cohort of athletes...
September 2015: Appetite
https://www.readbyqxmd.com/read/25962716/protein-carbonyl-levels-correlate-with-performance-in-elite-field-hockey-players
#15
Frederico Luis Rosa-Lima, Luiz Lannes, Diego Viana-Gomes, Anna Paola T R Pierucci, Verônica P Salerno
Excess and incorrectly selected exercise can degrade athletic performance from an imbalance in redox homeostasis and oxidative stress, but well-planned training and nutrition can improve antioxidant capacity. The aim of the study was to investigate how nutrient intake could influence oxidative stress and cell lesion biomarkers after 5 days of training followed by a game. Blood was collected from 10 athletes at the start of training (basal), after training (pre-game), and postgame. Their acceleration capacity also was measured pre- and postgame...
July 2015: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/25958941/carbohydrate-management-in-athletes-with-type-1-diabetes-in-a-10%C3%A2-km-run-competition
#16
RANDOMIZED CONTROLLED TRIAL
S Murillo, L Brugnara, E Del Campo, I Yagüe, B Dueñas, A Novials
The aim of this study was to identify the real consumption of CHO during a 10 km competitive run, to compare data with the recommended quantities according to current guidelines, and to analyse the clinical events associated with these different amounts. Protocol 1: observational study including 31 athletes with T1D and 127 athletes without diabetes, comparing data taken from dietary records of CHO intake on the competition day. Protocol 2: single-blind randomized trial in 18 athletes with T1D, testing a pre-exercise CHO supplement of 0...
October 2015: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/25897297/nutritional-knowledge-and-eating-habits-of-professional-rugby-league-players-does-knowledge-translate-into-practice
#17
Ieva Alaunyte, John L Perry, Tony Aubrey
BACKGROUND: Adequate nutrient intake is important to support training and to optimise performance of elite athletes. Nutritional knowledge has been shown to play an important role in adopting optimal nutrition practices. The aim of the present study was to investigate the relationship between the level of nutritional knowledge and dietary habits in elite English rugby league players using the eatwell plate food categories. METHOD: General nutritional knowledge questionnaires were collected during the Super League competitive season in the first team squad of 21 professional Rugby league players (mean age 25 ± 5 yrs, BMI 27 ± 2...
2015: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/25811415/nutritional-supplement-habits-of-athletes-with-an-impairment-and-their-sources-of-information
#18
Terri Susan Graham-Paulson, Claudio Perret, Brett Smith, Jeanette Crosland, Victoria Louise Goosey-Tolfrey
The consumption of nutritional supplements (NS) is common among able-bodied (AB) athletes yet little is known about NS use by athletes with an impairment. This study examined the: (i) prevalence of NS use by athletes with an impairment; (ii) reasons for use/ nonuse; (iii) sources of information regarding NS; and (iv) whether age, gender, impairment, performance level and sport category influence NS use. The questionnaire was completed by 399 elite (n = 255) and nonelite (n = 144) athletes (296 M, 103 F) online or at a sporting event/training camp...
August 2015: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/25767697/a-case-study-evaluation-of-competitors-undertaking-an-antarctic-ultra-endurance-event-nutrition-hydration-and-body-composition-variables
#19
Scott Paulin, Justin Roberts, Michael Roberts, Ian Davis
BACKGROUND: The nutritional demands of ultra-endurance racing are well documented. However, the relationship between nutritional consumption and performance measures are less obvious for athletes competing in Polar conditions. Therefore, the aim of this study was to evaluate dietary intake, hydration status, body composition and performance times throughout an 800-km Antarctic race. METHODS: The event organisers declared that 17 competitors would participate in the South Pole race...
2015: Extreme Physiology & Medicine
https://www.readbyqxmd.com/read/25675306/the-measurement-and-interpretation-of-dietary-protein-distribution-during-a-rugby-preseason
#20
Kristen MacKenzie, Gary Slater, Neil King, Nuala Byrne
Evidence suggests that increasing protein distribution may be desirable to promote muscle protein synthesis (MPS) in combination with resistance exercise. However, there is a threshold above which additional protein consumption has limited benefit for MPS and may promote protein loss due to increased oxidation. This study aimed to measure daily protein intake and protein distribution in a cohort of rugby players. Twenty-five developing elite rugby union athletes (20.5 ± 2.3 years, 100.2 ± 13.3 kg, 184.4 ± 7...
August 2015: International Journal of Sport Nutrition and Exercise Metabolism
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