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https://www.readbyqxmd.com/read/28642676/international-society-of-sports-nutrition-position-stand-protein-and-exercise
#1
REVIEW
Ralf Jäger, Chad M Kerksick, Bill I Campbell, Paul J Cribb, Shawn D Wells, Tim M Skwiat, Martin Purpura, Tim N Ziegenfuss, Arny A Ferrando, Shawn M Arent, Abbie E Smith-Ryan, Jeffrey R Stout, Paul J Arciero, Michael J Ormsbee, Lem W Taylor, Colin D Wilborn, Doug S Kalman, Richard B Kreider, Darryn S Willoughby, Jay R Hoffman, Jamie L Krzykowski, Jose Antonio
The International Society of Sports Nutrition (ISSN) provides an objective and critical review related to the intake of protein for healthy, exercising individuals. Based on the current available literature, the position of the Society is as follows:An acute exercise stimulus, particularly resistance exercise, and protein ingestion both stimulate muscle protein synthesis (MPS) and are synergistic when protein consumption occurs before or after resistance exercise.For building muscle mass and for maintaining muscle mass through a positive muscle protein balance, an overall daily protein intake in the range of 1...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28641022/a-randomized-single-dose-parallel-study-on-enhancement-of-nitric-oxide-in-serum-and-saliva-with-the-use-of-natural-sports-supplement-in-healthy-adults
#2
Joby Jacob, Sreeraj Gopi, Chandradhara Divya
Sports supplements that stimulate the production of nitric oxide (NO) are widely promoted agents in the sports nutrition domain, and nitric oxide plays an important role to enhance the cardiovascular and physical fitness of the sports participants. The purpose of the study is to investigate whether oral intake of a sports nutritional supplement (Fitnox) is able to increase nitrate (NO3(-)) and nitrite (NO2(-)) levels in blood serum and saliva of healthy adults. Fitnox is a unique blend of Kaempferia parviflora methoxy flavones, pomegranate peel polyphenols, and Moringa oleifera leaf saponins...
June 22, 2017: Journal of Dietary Supplements
https://www.readbyqxmd.com/read/28640882/quantitation-of-underivatized-branched-chain-amino-acids-in-sport-nutritional-supplements-by-capillary-electrophoresis-with-direct-or-indirect-uv-absorbance-detection
#3
Jun Qiu, Jinhao Wang, Zhongqi Xu, Huiqing Liu, Jie Ren
The branched-chain amino acids (BCAAs) including leucine (Leu), isoleucine (Ile) and valine (Val) play a pivotal role in the human body. Herein, we developed capillary electrophoresis (CE) coupled with conventional UV detector to quantify underivatized BCAAs in two kinds of sport nutritional supplements. For direct UV detection at 195 nm, the BCAAs (Leu, two enantiomers of Ile and Val) were separated in a background electrolyte (BGE) consisting of 40.0 mmol/L sodium tetraborate, and 40.0 mmol/L β-cyclodextrin (β-CD) at pH 10...
2017: PloS One
https://www.readbyqxmd.com/read/28630601/international-society-of-sports-nutrition-position-stand-diets-and-body-composition
#4
REVIEW
Alan A Aragon, Brad J Schoenfeld, Robert Wildman, Susan Kleiner, Trisha VanDusseldorp, Lem Taylor, Conrad P Earnest, Paul J Arciero, Colin Wilborn, Douglas S Kalman, Jeffrey R Stout, Darryn S Willoughby, Bill Campbell, Shawn M Arent, Laurent Bannock, Abbie E Smith-Ryan, Jose Antonio
Position Statement: The International Society of Sports Nutrition (ISSN) bases the following position stand on a critical analysis of the literature regarding the effects of diet types (macronutrient composition; eating styles) and their influence on body composition. The ISSN has concluded the following. 1) There is a multitude of diet types and eating styles, whereby numerous subtypes fall under each major dietary archetype. 2) All body composition assessment methods have strengths and limitations. 3) Diets primarily focused on fat loss are driven by a sustained caloric deficit...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28628396/differential-in-maximal-aerobic-capacity-by-sex-in-collegiate-endurance-athletes-consuming-a-marginally-low-carbohydrate-diet
#5
Marissa N Baranauskas, Brian Miller, Jordan T Olson, Michelle Boltz, Laura Richardson, Matthew Juravich, Ronald Otterstetter
PURPOSE: Although current sports nutrition recommendations advocate for a high carbohydrate (CHO) intake among endurance athletes, recent research has suggested that training with low CHO availability may augment adaptations to aerobic training. The purpose of this study was to observe the dietary habits of collegiate distance runners and to investigate the effects of habitual CHO intake on aerobic performance [VO2max(post)] during a competitive season. METHODS: During an 8-week trial period, 12 (N = 12) collegiate track athletes recorded their self-selected dietary intake via 24-hour recall...
June 19, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28619406/physical-activity-sleep-and-bmi-percentile-in-rural-and-urban-ugandan-youth
#6
Mary J Christoph, Diana S Grigsby-Toussaint, Rhona Baingana, James M Ntambi
BACKGROUND: Uganda is experiencing a dual burden of over- and undernutrition, with overweight prevalence increasing while underweight remains common. Potential weight-related factors, particularly physical activity, sleep, and rural/urban status, are not currently well understood or commonly assessed in Ugandan youth. OBJECTIVE: The purpose of this study was to pilot test a survey measuring weight-related factors in rural and urban Ugandan schoolchildren. METHODS: A cross-sectional survey measured sociodemographics, physical activity, sleep patterns, and dietary factors in 148 rural and urban schoolchildren aged 11-16 in central Uganda...
March 2017: Annals of Global Health
https://www.readbyqxmd.com/read/28615996/international-society-of-sports-nutrition-position-stand-safety-and-efficacy-of-creatine-supplementation-in-exercise-sport-and-medicine
#7
REVIEW
Richard B Kreider, Douglas S Kalman, Jose Antonio, Tim N Ziegenfuss, Robert Wildman, Rick Collins, Darren G Candow, Susan M Kleiner, Anthony L Almada, Hector L Lopez
Creatine is one of the most popular nutritional ergogenic aids for athletes. Studies have consistently shown that creatine supplementation increases intramuscular creatine concentrations which may help explain the observed improvements in high intensity exercise performance leading to greater training adaptations. In addition to athletic and exercise improvement, research has shown that creatine supplementation may enhance post-exercise recovery, injury prevention, thermoregulation, rehabilitation, and concussion and/or spinal cord neuroprotection...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28601167/evaluation-of-a-theory-based-intervention-aimed-at-reducing-intention-to-use-restrictive-dietary-behaviors-among-adolescent-female-athletes
#8
Catherine Laramée, Vicky Drapeau, Pierre Valois, Claude Goulet, Raphaëlle Jacob, Véronique Provencher, Benoît Lamarche
OBJECTIVE: To evaluate the effectiveness of a theory-based intervention to reduce the intention to use restrictive dietary behaviors for losing weight among adolescent female athletes involved in aesthetic sports. DESIGN: Cluster-randomized controlled trial. SETTING: Aesthetic sport teams of adolescent female athletes aged 12-17 years. PARTICIPANTS: Two teams (n = 37 athletes) in the intervention group and 3 teams (n = 33) in the comparison group...
June 2017: Journal of Nutrition Education and Behavior
https://www.readbyqxmd.com/read/28585209/influence-of-antioxidants-on-leptin-metabolism-and-its-role-in-the-pathogenesis-of-obesity
#9
Harald Mangge, Christian Ciardi, Kathrin Becker, Barbara Strasser, Dietmar Fuchs, Johanna M Gostner
Obesity is associated with low-grade inflammation. Leptin, a hormone made by fat cells regulates appetite and hunger and thus food intake behavior. Interestingly, , food preservatives like sodium sulfite and sodium benzoate and also natural colorant and spice compounds such as curcumin were found to decrease the release of leptin in murine 3T3-L1 adipocytes, after co-incubation with LPS, which was added to mimic the pro-inflammatory status in obesity. Several of these compounds are well known food antioxidants...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28582628/energetic-demand-and-physical-conditioning-of-table-tennis-players-a-study-review
#10
Alessandro Moura Zagatto, Miran Kondric, Beat Knechtle, Pantelis Theo Nikolaidis, Billy Sperlich
Table tennis is a racket sport characterised by an intermittent movement profile, including short rallies interspersed with short breaks. In contrast to other racket sports, information is lacking regarding the: (i) physiological responses during table tennis matches and training; and (ii) practical recommendations for enhancing aerobic and anaerobic performance in table tennis by improving cardio-metabolic and neuro-muscular fitness, anthropometry and nutritional strategies. Therefore, this review article attempts to narratively provide an overview of the physiology of table tennis by describing the metabolic mechanisms underlying match play and outlining a framework for practical recommendations for improving cardio-metabolic and neuro-muscular fitness, anthropometry as well as nutritional strategies...
June 5, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28558252/the-effect-of-exercise-intensity-and-excess-post-exercise-oxygen-consumption-on-postprandial-blood-lipids-in-physically-inactive-men
#11
Laurel A Littlefield, Zacharias Papadakis, Katie M Rogers, José Moncada-Jiménez, J Kyle Taylor, Peter W Grandjean
BACKGROUND: Reductions in postprandial lipemia have been observed following aerobic exercise of sufficient energy expenditure. Increased excess post-exercise oxygen consumption (EPOC) has been documented when comparing high- versus low-intensity exercise. The contribution of EPOC energy expenditure to alterations in postprandial lipemia has not been determined. OBJECTIVE: The purpose of this study was to evaluate the effects of low- and high-intensity exercise on postprandial lipemia in healthy, sedentary, overweight and obese men (43 <u>+</u> 10 years; 31...
May 30, 2017: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/28557860/applying-the-acsm-preparticipation-screening-algorithm-to-u-s-adults-nhanes-2001-04
#12
Geoffrey P Whitfield, Deborah Riebe, Meir Magal, Gary Liguori
PURPOSE: For most people, the benefits of physical activity far outweigh the risks. Research has suggested exercise preparticipation questionnaires might refer an unwarranted number of adults for medical evaluation before exercise initiation, creating a potential barrier to adoption. The new American College of Sports Medicine (ACSM) prescreening algorithm relies on current exercise participation; history and symptoms of cardiovascular, metabolic or renal disease; and desired exercise intensity to determine referral status...
May 26, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28553855/histomorphometric-study-of-the-effect-of-methionine-on-small-intestine-parameters-in-rat-an-applied-histologic-study
#13
Sajjad Seyyedin, Mohammad Naser Nazem
Assessment of morphological changes has more often been used in the diagnosis and assessment of intestinal pathology and development. Since methionine is widely used in nutritional and sports supplements and also there is not enough information about the effect of this amino acid on the gastrointestinal histomorphometry, the aim of this study was to assess the effect of methionine on the small intestine histomorphometry. Thirty male Wistar rats were randomly divided to 3 equal groups. Two treatment groups received 100 and 200 mg/kg L-methionine solution respectively via intraperitoneal injection while the control group received normal saline...
May 29, 2017: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/28540345/barriers-and-facilitators-to-intake-of-dairy-products-in-adolescent-males-and-females-with-different-levels-of-habitual-intake
#14
Megan Racey, Jeanette Bransfield, Kathryn Capello, David Field, Verena Kulak, David Machmueller, Michèle Preyde, Genevieve Newton
Background: Dairy products and alternatives can contribute to overall good health including positive body composition and decreased adiposity; however, these foods are grossly underconsumed by youth, and worldwide, almost 25% of children are overweight or obese. Objective: The study investigated the barriers and facilitators toward dairy consumption by Grade 7 youth. Methods: Thirty 50-minute, audio-recorded focus groups were conducted with 134 students in eight Grade 7 classes across 5 elementary schools. Focus groups were led by trained facilitators in the elementary schools and participants were separated based on dairy consumption and gender...
2017: Global Pediatric Health
https://www.readbyqxmd.com/read/28539376/longitudinal-associations-of-away-from-home-eating-snacking-screen-time-and-physical-activity-behaviors-with-cardiometabolic-risk-factors-among-chinese-children-and-their-parents
#15
Fei Dong, Annie Green Howard, Amy H Herring, Amanda L Thompson, Linda S Adair, Barry M Popkin, Allison E Aiello, Bing Zhang, Penny Gordon-Larsen
Background: Little is known about intergenerational differences in associations of urbanization-related lifestyle behaviors with cardiometabolic risk factors in children and their parents in rapidly urbanizing China.Objective: We tested the intergenerational differences in longitudinal associations of away-from-home eating, snacking, screen time, and leisure-time sports with high waist-to-height ratio (WHtR), elevated blood pressure (BP), elevated glycated hemoglobin (HbA1c), and elevated C-reactive protein (CRP) among Chinese children and their parents...
May 24, 2017: American Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/28530510/self-reported-physical-activity-and-exercise-patterns-in-children-with-sickle-cell-disease
#16
Osarhiemen A Omwanghe, Devin S Muntz, Soyang Kwon, Simone Montgomery, Opeyemi Kemiki, Lewis L Hsu, Alexis A Thompson, Robert I Liem
PURPOSE: Sickle cell disease (SCD) significantly affects physical functioning. We examined physical activity (PA) patterns in children with SCD versus a national sample and factors associated with PA and participation in physical education and organized sports. METHOD: One hundred children with SCD completed a 58-item survey with questions from the 2009-2010 National Health and Nutrition Examination Survey (NHANES) Physical Activity Questionnaire and others on physical education and sports, disease impact, and physical functioning...
May 22, 2017: Pediatric Exercise Science
https://www.readbyqxmd.com/read/28530485/energy-requirement-assessment-in-japanese-table-tennis-players-using-the-doubly-labeled-water-method
#17
Hiroyuki Sagayama, Genki Hamaguchi, Makiko Toguchi, Mamiko Ichikawa, Yosuke Yamada, Naoyuki Ebine, Yasuki Higaki, Hiroaki Tanaka
Total daily energy expenditure (TEE) and physical activity level (PAL) are important for adequate nutritional management in athletes. The PAL of table tennis has been estimated to about 2.0: it is categorized as a moderate-activity sport (4.0 metabolic equivalents [METs]) in the Compendium of Physical Activities. However, modern table tennis makes high physiological demands. The aims of the present study were to examine (1) TEE and PAL of competitive table tennis players and (2) the physiological demands of various types of table tennis practice...
May 22, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28525992/water-and-beverage-consumption-patterns-among-4-to-13-year-old-children-in-the-united-kingdom
#18
Florent Vieux, Matthieu Maillot, Florence Constant, Adam Drewnowski
BACKGROUND: The UK government has announced a tax on sugar-sweetened beverages. The aim of this study was to assess consumption patterns for plain drinking water relative to sugary beverages among UK children. METHODS: Dietary intake data for 845 children aged 4-13 years came from the nationally representative cross-sectional National Diet and Nutrition Survey, 2008-2011. Beverage categories were drinking water (tap or bottled), milk, 100% fruit juices, soda, fruit drinks, tea, coffee, sports drinks, flavored waters, and liquid supplements...
May 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28523517/body-size-of-male-youth-soccer-players-1978-2015
#19
REVIEW
Robert M Malina, António J Figueiredo, Manuel J Coelho-E-Silva
BACKGROUND: Studies of the body size and proportions of athletes have a long history. Comparisons of athletes within specific sports across time, though not extensive, indicate both positive and negative trends. OBJECTIVE: To evaluate secular variation in heights and weights of male youth soccer players reported in studies between 1978 and 2015. METHODS: Reported mean ages, heights, and weights of male soccer players 9-18 years of age were extracted from the literature and grouped into two intervals: 1978-99 and 2000-15...
May 18, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28515836/college-students-knowledge-of-recovery-beverage-serving-sizes
#20
Stephanie Lewis, Victoria Baxter, Kim Spaccarotella, Walter Andzel
Previous research suggests that chocolate milk may be a beneficial recovery beverage, yet little is known about how athletes and students training for careers in sports science or health-related fields interpret recommended recovery beverage serving sizes. This study examined college students' ability to correctly apply serving size recommendations for chocolate milk and protein powder used during post-exercise recovery and assessed usual consumption of milk as a recovery beverage. College students (34 women, 39 men) poured the amount of chocolate milk they would consume within 90 minutes after exercise unaided and with the use of a serving size guide...
2017: International Journal of Exercise Science
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