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Nutrition sports

Débora Finger, Fábio Juner Lanferdini, Juliano Boufleur Farinha, Clarissa Müller Brusco, Lucas Helal, Francesco Pinto Boeno, Eduardo Lusa Cadore, Ronei Silveira Pinto
INTRODUCTION: Protein (PRO) combined with a carbohydrate (CHO) beverage may have an ergogenic effect on endurance performance. However, evidence regarding its efficacy on similar conditions to athletes' race day is still lacking. OBJECTIVE: To compare the effect of three different nutritional supplementation strategies on performance and muscle recovery in a duathlon protocol. METHODS: , 13 male athletes (29.7 ± 7.7 years) participated in three simulated Olympic-distance duathlons under three different, randomly assigned, supplementation regimens: carbohydrate drink (CHO, 75 g); isocaloric CHO plus protein drink (CHO+PRO, 60...
March 15, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
Monica Taylor, Elizabeth F Nagle, Fredric L Goss, Elaine N Rubinstein, Andrew Simonson
Monitoring an athlete's energy intake and energy expenditure (EE) is an important consideration of nutritional planning for sport conditioning and peak performance. In order to provide appropriate recommendations regarding nutritional requirements and caloric needs, an accurate determination of energy requirements is necessary. By knowing an individual's EE, a coach, athletic performance staff or trainer can effectively determine training loads and volumes necessary for periodization and seasonal planning for a particular sport...
2018: International Journal of Exercise Science
Ronald J Maughan, Louise M Burke, Jiri Dvorak, D Enette Larson-Meyer, Peter Peeling, Stuart M Phillips, Eric S Rawson, Neil P Walsh, Ina Garthe, Hans Geyer, Romain Meeusen, Lucas J C van Loon, Susan M Shirreffs, Lawrence L Spriet, Mark Stuart, Alan Vernec, Kevin Currell, Vidya M Ali, Richard Gm Budgett, Arne Ljungqvist, Margo Mountjoy, Yannis P Pitsiladis, Torbjørn Soligard, Uğur Erdener, Lars Engebretsen
Nutrition usually makes a small but potentially valuable contribution to successful performance in elite athletes, and dietary supplements can make a minor contribution to this nutrition programme. Nonetheless, supplement use is widespread at all levels of sport. Products described as supplements target different issues, including (1) the management of micronutrient deficiencies, (2) supply of convenient forms of energy and macronutrients, and (3) provision of direct benefits to performance or (4) indirect benefits such as supporting intense training regimens...
March 14, 2018: British Journal of Sports Medicine
Kazunori Yoh, Hiroki Nishikawa, Hirayuki Enomoto, Noriko Ishii, Yoshinori Iwata, Akio Ishii, Yukihisa Yuri, Yuho Miyamoto, Kunihiro Hasegawa, Chikage Nakano, Ryo Takata, Takashi Nishimura, Nobuhiro Aizawa, Yoshiyuki Sakai, Naoto Ikeda, Tomoyuki Takashima, Hiroko Iijima, Shuhei Nishiguchi
Introduction and purpose: Patients with pancreatic cancer (PC) have long been known to have high rates of depression. Depression in patients with PC can be linked to sleep disturbance. The American College of Sports Medicine notes that physical exercise is safe for most patients with cancer and physical inactivity should be avoided. However, clinical impacts of exercise interventions (EIs) on patients with PC have been poorly investigated. We aim to prospectively examine the effect of EIs on sleep disturbance in patients with PC using actigraphy, which is an objective measurement of motor activity and sleep...
2018: BMJ Open Gastroenterology
Jonathan M Oliver, Anthony J Anzalone, Margaret T Jones, K Michele Kirk, David A Gable, Yanqin Gao, William S Harris, Henrik Zetterberg
No abstract text is available yet for this article.
March 2018: Current Sports Medicine Reports
Derrick D Brown
Vegetarianism provides a catchall term for a variety of diets that exclude the consumption of some or all animal products. Contrary to popular claims, appropriately designed and managed vegetarian diets contain foods nutritionally sufficient for health, well-being, and physical performance. Vegetarian dancers can meet their protein needs from primarily or exclusively (vegan) plant-based sources when a variety of these foods are consumed daily and energy intake is adequate. However, the quality and timing of dietary intake is of key importance to meet the physical demands typical of high intensity, intermittent types of dance styles...
March 15, 2018: Journal of Dance Medicine & Science
Pam M Ku, Jennifer L Waller, Claude Sportès, Amber B Clemmons
PURPOSE: Hematopoietic cell transplant (HCT) recipients often require intravenous (IV) magnesium repletion due to poor dietary intake, gastrointestinal loss, and use of concomitant magnesium wasting medications. Prolonging the IV magnesium infusion rate has been postulated to reduce renal clearance and improve retention; however, limited evidence supports this hypothesis. METHODS: We reviewed autologous and allogeneic HCT recipients (n = 82) who received IV magnesium at our institution between 2014 and 2016: 41 patients received IV magnesium at a prolonged rate of 0...
March 5, 2018: Supportive Care in Cancer: Official Journal of the Multinational Association of Supportive Care in Cancer
Alexander Gardner, Harold G Parkes, Guy H Carpenter, Po-Wah So
Metabolic profiling by1 H-NMR spectroscopy is an under-utilised technology in salivary research although preliminary studies have identified promising results in multiple fields (diagnostics, nutrition, sports physiology). Translation of preliminary findings into validated, clinically approved knowledge is hindered by variability in protocol for the collection, storage, preparation and analysis of saliva. This study aims to evaluate the effects of differing sample pre-treatments on the1 H-NMR metabolic profile of saliva...
March 2, 2018: Journal of Proteome Research
Hibai Lopez-Gonzalez, Ana Estévez, Susana Jiménez-Murcia, Mark D Griffiths
The prevalence of sports betting advertising has become a major concern for gambling regulators, particularly since the legalization of online gambling in many European jurisdictions. Although the composition of gambling advertisement narratives has received some limited attention, nothing is known regarding how betting advertisements (often referred to as "adverts" or "commercials") might be associating gambling with other potentially risky behaviors. The present paper examines the representation of alcohol drinking and low nutritional value food eating in sports betting advertising...
2018: International Journal of Mental Health and Addiction
Catherine M Pound, Becky Blair
Sports drinks and caffeinated energy drinks (CEDs) are commonly consumed by youth. Both sports drinks and CEDs pose potential risks for the health of children and adolescents and may contribute to obesity. Sports drinks are generally unnecessary for children engaged in routine or play-based physical activity. CEDs may affect children and adolescents more than adults because they weigh less and thus experience greater exposure to stimulant ingredients per kilogram of body weight. Paediatricians need to recognize and educate patients and families on the differences between sport drinks and CEDs...
October 2017: Paediatrics & Child Health
Catherine Coccia, Stephanie Mihaly Fernandes, Julinar Altiti
The main objective of this study was to determine the feasibility and efficacy of a social media-based nutrition intervention using Twitter on nutrition knowledge, dietary practices, body mass index, self-efficacy, and social support among student-athletes. Participants included 50 male and female NCAA Division I student-athletes between the ages of 18-24 years old. Data were collected in October 2014. The study design employed a six-week, social media intervention using Twitter©, to increase nutrition knowledge, self-efficacy, social support and dietary adherence to the Dietary Guidelines for Americans recommendations...
February 22, 2018: Journal of Strength and Conditioning Research
Ulrich Hamann, Christine Ankel
LEARNING OBJECTIVES:  After reviewing this article, the participant should be able to: 1. Understand the epidemiology of breast cancer, its incidence and impact. 2. Appreciate the importance of early diagnosis and treatment. 3. Understand the concept of comprehensive breast cancer management and its multidisciplinarity. 4. Be knowledgeable about the entire process required to manage breast cancer, since the early diagnosis until the management of non breast related conditions derived from the treatment...
February 2018: Deutsche Medizinische Wochenschrift
(no author information available yet)
In the article by Gough, L.A., Rimmer, S., Osler, C.J., & Higgins, M.F. (2017). Ingestion of sodium bicarbonate (NaHCO3 ) following a fatiguing bout of exercise accelerates postexercise acid-base balance recovery and improves subsequent high-intensity cycling time to exhaustion, International Journal of Sport Nutrition and Exercise Metabolism, 27(5), 429-438, doi: 10.1123/ijsnem.2017-0065 , we did not accurately reflect several content and layout corrections which were needed. These include: (a) The key for Figure 1 was erroneously included for Figure 3 (and not for Figure 1)...
February 22, 2018: International Journal of Sport Nutrition and Exercise Metabolism
Peter Peeling, Martyn J Binnie, Paul S R Goods, Marc Sim, Louise M Burke
A strong foundation in physical conditioning and sport-specific experience, in addition to a bespoke and periodized training and nutrition program, are essential for athlete development. Once these underpinning factors are accounted for, and the athlete reaches a training maturity and competition level where marginal gains determine success, a role may exist for the use of evidence-based performance supplements. However, it is important that any decisions surrounding performance supplements are made in consideration of robust information that suggests the use of a product is safe, legal, and effective...
February 21, 2018: International Journal of Sport Nutrition and Exercise Metabolism
Indrė Lapinskienė, Gabija Mikulevičienė, Gabija Laubner, Robertas Badaras
Refeeding syndrome, as a life-threatening condition, is well known among severely malnourished or deeply metabolically stressed patients. This case presents an atypical manifestation of the syndrome to a young bodybuilder, whose extreme diet, including 5 months of insufficient nourishment before the sport competition and 6 days of carbohydrates overload afterwards, has led him to a bilateral lower - limb paralysis and drastic homeostatic disturbances. Severe hypokalemia, hypophosphatemia, hypomagnesemia and hyperglycemia with mildly elevated liver enzymes have occurred...
February 2018: Clinical Nutrition ESPEN
Samuel G Impey, Mark A Hearris, Kelly M Hammond, Jonathan D Bartlett, Julien Louis, Graeme L Close, James P Morton
Deliberately training with reduced carbohydrate (CHO) availability to enhance endurance-training-induced metabolic adaptations of skeletal muscle (i.e. the 'train low, compete high' paradigm) is a hot topic within sport nutrition. Train-low studies involve periodically training (e.g., 30-50% of training sessions) with reduced CHO availability, where train-low models include twice per day training, fasted training, post-exercise CHO restriction and 'sleep low, train low'. When compared with high CHO availability, data suggest that augmented cell signalling (73% of 11 studies), gene expression (75% of 12 studies) and training-induced increases in oxidative enzyme activity/protein content (78% of 9 studies) associated with 'train low' are especially apparent when training sessions are commenced within a specific range of muscle glycogen concentrations...
February 16, 2018: Sports Medicine
François D Desgorces, Christophe Moinard, Mounir Chennaoui, Jean-François Toussaint, Cyril Petibois, Philippe Noirez
Fasted or weight-category athletes manage their training under strict diet conditions that could impair the stress-recovery balance and result in acute or chronic fatigue. However, to date, no validated biomarker are available to quantify this phenomena. The aim of this study was to assess the validity of a specific index combining plasma albumin and weight change to detect nutrition-related risks of fatigue increase and under-performance in athletes experiencing particular nutritional conditions. An athlete's nutrition risk index (ANRI) equation, based on data from lightweight and heavyweight rowers, was developed using relationship between plasma albumin concentrations combined to weight changes with sport performance and overtraining scores and was tested by odds ratio for failure...
June 2017: Biochimie open
Joanne G Mirtschin, Sara F Forbes, Louise E Cato, Ida A Heikura, Nicki Strobel, Rebecca Hall, Louise M Burke
We describe the implementation of a 3-week dietary intervention in elite race walkers at the Australian Institute of Sport, with a focus on the resources and strategies needed to accomplish a complex study of this scale. Interventions involved: traditional guidelines of high carbohydrate (CHO) availability for all training sessions (HCHO); a periodized CHO diet which integrated sessions with low CHO and high CHO availability within the same total CHO intake, and a ketogenic low-CHO high-fat diet (LCHF). 7-day menus and recipes were constructed for a communal eating setting to meet nutritional goals as well as individualized food preferences and special needs...
February 12, 2018: International Journal of Sport Nutrition and Exercise Metabolism
Jianping Zhao, Mei Wang, Bharathi Avula, Ikhlas A Khan
Phenethylamines (PEAs) are popular substances found in weight-loss and sports nutrition supplements. They are generally pharmacologically active and primarily affect the sympathetic nervous system. Many PEAs are synthetic chemicals and are on the prohibited list of the World Anti-Doping Agency. In this study, nuclear magnetic resonance (NMR) spectroscopy was applied to detect and identify the presence of PEAs in sports dietary supplements without the need for chromatographic separation or pre-knowledge on formulation...
January 26, 2018: Journal of Pharmaceutical and Biomedical Analysis
Lynne Chepulis, Gael Mearns, Shaunie Hill, Jason Hy Wu, Michelle Crino, Sarah Alderton, Katharine Jenner
OBJECTIVE: To compare the nutritional content, serving size and taxation potential of supermarket beverages from four different Western countries. DESIGN: Cross-sectional analysis. Multivariate regression analysis and χ 2 comparisons were used to detect differences between countries. SETTING: Supermarkets in New Zealand (NZ), Australia, Canada and the UK. SUBJECTS: Supermarket beverages in the following categories: fruit juices, fruit-based drinks, carbonated soda, waters and sports/energy drinks...
February 7, 2018: Public Health Nutrition
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