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Journal of the International Society of Sports Nutrition

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https://www.readbyqxmd.com/read/30016961/quality-of-life-of-female-and-male-vegetarian-and-vegan-endurance-runners-compared-to-omnivores-results-from-the-nurmi-study-step-2
#1
Patrick Boldt, Beat Knechtle, Pantelis Nikolaidis, Christoph Lechleitner, Gerold Wirnitzer, Claus Leitzmann, Thomas Rosemann, Katharina Wirnitzer
BACKGROUND: Health-related effects of a vegetarian or vegan diet are known to support parameters positively affecting exercise performance in athletes, whereas knowledge about psyche and wellbeing is sparse. Therefore, the aim of the Nutrition and Running High Mileage (NURMI) Study (Step 2) was to compare Quality of Life (QOL) scores among endurance runners following a vegetarian or vegan diet against those who adhere to an omnivorous diet. METHODS: The study was conducted following a cross-sectional design...
July 17, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29996843/%C3%AE-alanine-supplementation-increased-physical-performance-and-improved-executive-function-following-endurance-exercise-in-middle-aged-individuals
#2
Taylor Furst, Alyssa Massaro, Courtney Miller, Brian T Williams, Zach M LaMacchia, Peter J Horvath
BACKGROUND: Sarcopenia, a reduction in muscle mass and function seen in aging populations, may be countered by improving systemic carnosine stores via beta-Alanine (β-alanine) supplementation. Increasing systemic carnosine levels may result in enhanced anti-oxidant, neuro-protective and pH buffering capabilities. This enhancement should result in improved exercise capacity and executive function. METHODS: Twelve healthy adults (average age = 60.5 ± 8.6 yrs, weight = 81...
July 11, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29986720/efficacy-of-ketogenic-diet-on-body-composition-during-resistance-training-in-trained-men-a-randomized-controlled-trial
#3
Salvador Vargas, Ramón Romance, Jorge L Petro, Diego A Bonilla, Ismael Galancho, Sergio Espinar, Richard B Kreider, Javier Benítez-Porres
BACKGROUND: Ketogenic diets (KD) have become a popular method of promoting weight loss. More recently, some have recommended that athletes adhere to ketogenic diets in order to optimize changes in body composition during training. This study evaluated the efficacy of an 8-week ketogenic diet (KD) during energy surplus and resistance training (RT) protocol on body composition in trained men. METHODS: Twenty-four healthy men (age 30 ± 4.7 years; weight 76.7 ± 8...
July 9, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29945625/eight-weeks-of-resistance-training-in-conjunction-with-glutathione-and-l-citrulline-supplementation-increases-lean-mass-and-has-no-adverse-effects-on-blood-clinical-safety-markers-in-resistance-trained-males
#4
Paul Hwang, Flor E Morales Marroquín, Josh Gann, Tom Andre, Sarah McKinley-Barnard, Caelin Kim, Masahiko Morita, Darryn S Willoughby
BACKGROUND: Supplementation of combined glutathione (GSH) with L-citrulline in response to a single bout of resistance exercise has been shown to increase plasma nitric oxide metabolites, nitrite and nitrate and cyclic guanosine monophosphate (cGMP), which may play a role in muscle protein synthesis. As a result, in response to resistance training (RT) these responses may establish a role for GSH + L-citrulline to increase muscle mass. This study attempted to determine the effects of an 8-week RT program in conjunction with GSH (Setria®) + L-citrulline, L-citrulline-malate, or placebo supplementation on lean mass and its association with muscle strength...
June 27, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29914522/low-fat-diet-and-medium-fat-diets-containing-coconut-oil-and-soybean-oil-exert-different-metabolic-effects-in-untrained-and-treadmill-trained-mice
#5
Mark Christian Manio, Shigenobu Matsumura, Kazuo Inoue
BACKGROUND: Diets containing fats of different proportions and types have been demonstrated to influence metabolism. These fats differ in long chain fatty acids (LCFAs) or medium chain fatty acids (MCFAs) content. In our laboratory using swimming as the training modality, MCFAs increased endurance attributed to increased activities of oxidative enzymes. How it affects whole-body metabolism remains unexplored. The present study investigated the metabolic, biochemical and genetic adaptations with treadmill running as the training modality...
June 18, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29898738/serum-concentration-of-cobalt-molybdenum-and-zinc-in-aerobic-anaerobic-and-aerobic-anaerobic-sportsmen
#6
Marcos Maynar, Francisco Llerena, Francisco Javier Grijota, Mario Pérez-Quintero, Ignacio Bartolomé, Javier Alves, María Concepción Robles, Diego Muñoz
BACKGROUND: The aim of the present study was to determine changes in the serum concentrations of trace elements Cobalt (Co), Molybdenum (Mo) and Zinc (Zn) among high-level sportsmen. METHODS: Eighty professional athletes of different metabolic modalities (aerobic, anaerobic and aerobic-anaerobic), were recruited before the beginning of their training seasons. Thirty-one sedentary participants of the same geographic area constituted the control group. Co, Mo and Zn analysis was performed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS)...
June 13, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29866199/individualized-hydration-plans-improve-performance-outcomes-for-collegiate-athletes-engaging-in-in-season-training
#7
David Ayotte, Michael P Corcoran
BACKGROUND: Athletes commonly consume insufficient fluid and electrolytes just prior to, or during training and competition. Unlike non-athletes or athletes who do not engage in frequent rigorous and prolonged training sessions, "hard trainers" may require additional sodium and better benefit from a hydration plan tailored to their individual physiology. The purpose of this randomized cross-over study was to determine whether a hydration plan based off of an athlete's sweat rate and sodium loss improves anaerobic and neurocognitive performance during a moderate to hard training session as well as heart rate recovery from this session...
June 4, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29855372/impact-of-a-purported-nootropic-supplementation-on-measures-of-mood-stress-and-marksmanship-performance-in-u-s-active-duty-soldiers
#8
Nicholas Barringer, Aaron Crombie, Russ Kotwal
BACKGROUND: The purpose of this study was to determine the impact of a commercially available purported nootropic supplement on mood, stress, and rifle marksmanship accuracy and engagement time via an Engagement Skills Trainer. METHODS: In this double-blind, placebo-controlled trial, 43 U.S. active duty Soldiers participating in a professional military course were assigned to treatment (n = 20; 16 males and 4 females) or placebo (n = 23; 15 males and 8 females) based on initial marksmanship score...
May 31, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29855319/enhanced-400-m-sprint-performance-in-moderately-trained-participants-by-a-4-day-alkalizing-diet-a-counterbalanced-randomized-controlled-trial
#9
Mirjam Limmer, Angi Diana Eibl, Petra Platen
BACKGROUND: Sodium bicarbonate (NaHCO3 ) is an alkalizing agent and its ingestion is used to improve anaerobic performance. However, the influence of alkalizing nutrients on anaerobic exercise performance remains unclear. Therefore, the present study investigated the influence of an alkalizing versus acidizing diet on 400-m sprint performance, blood lactate, blood gas parameters, and urinary pH in moderately trained adults. METHODS: In a randomized crossover design, eleven recreationally active participants (8 men, 3 women) aged 26...
May 31, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29764464/daytime-and-nighttime-casein-supplements-similarly-increase-muscle-size-and-strength-in-response-to-resistance-training-earlier-in-the-day-a-preliminary-investigation
#10
Jordan M Joy, Roxanne M Vogel, K Shane Broughton, Urszula Kudla, Nathaniel Y Kerr, Jason M Davison, Robert E C Wildman, Nancy M DiMarco
BACKGROUND: Casein protein consumed before sleep has been suggested to offer an overnight supply of exogenous amino acids for anabolic processes. The purpose of this study was to compare supplemental casein consumed earlier in the day (DayTime, DT) versus shortly before bed (NightTime, NT) on body composition, strength, and muscle hypertrophy in response to supervised resistance training. METHODS: Thirteen males participated in a 10-week exercise and dietary intervention while receiving 35 g casein daily...
May 15, 2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29743827/the-effect-of-carbohydrate-mouth-rinse-on-performance-biochemical-and-psychophysiological-variables-during-a-cycling-time-trial-a-crossover-randomized-trial
#11
Amanda M J Ferreira, Luiz F Farias-Junior, Thaynan A A Mota, Hassan M Elsangedy, Aline Marcadenti, Telma M A M Lemos, Alexandre H Okano, Ana P T Fayh
Background: The hypothesis of the central effect of carbohydrate mouth rinse (CMR) on performance improvement in a fed state has not been established, and its psychophysiological responses have not yet been described. The aim of this study was to evaluate the effect of CMR in athletes fed state on performance, biochemical and psychophysiological responses compared to ad libitum water intake. Methods: Eleven trained male cyclists completed a randomized, crossover trial, which consisted of a 30 km cycle ergometer at self-selected intensity and in a fed state...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29743826/effect-of-bilberry-juice-on-indices-of-muscle-damage-and-inflammation-in-runners-completing-a-half-marathon-a-randomised-placebo-controlled-trial
#12
Anthony Lynn, Samantha Garner, Nichola Nelson, Trevor N Simper, Anna C Hall, Mayur K Ranchordas
Background: Emerging evidence indicates that fruits rich in polyphenols may attenuate exercise-induced muscle damage and associated markers of inflammation and soreness. This study was conducted to determine whether bilberry juice (BJ), which is particularly rich in polyphenols, reduces markers of muscle damage in runners completing a half marathon. Methods: A total of 21 recreationally trained runners (age 30.9 ± 10.4 y; mass 71.6 ± 11.0 kg; M = 16; F = 5) were recruited to a single blind, randomised, placebo-controlled, parallel study...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29743825/creatine-electrolyte-supplementation-improves-repeated-sprint-cycling-performance-a-double-blind-randomized-control-study
#13
Daniel L Crisafulli, Harsh H Buddhadev, Lorrie R Brilla, Gordon R Chalmers, David N Suprak, Jun G San Juan
Background: Creatine supplementation is recommended as an ergogenic aid to improve repeated sprint cycling performance. Furthermore, creatine uptake is increased in the presence of electrolytes. Prior research examining the effect of a creatine-electrolyte (CE) supplement on repeated sprint cycling performance, however, did not show post-supplementation improvement. The purpose of this double blind randomized control study was to investigate the effect of a six-week CE supplementation intervention on overall and repeated peak and mean power output during repeated cycling sprints with recovery periods of 2 min between sprints...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29719493/effects-of-hydroxytyrosol-dose-on-the-redox-status-of-exercised-rats-the-role-of-hydroxytyrosol-in-exercise-performance
#14
Saad Al Fazazi, Rafael A Casuso, Jerónimo Aragón-Vela, Cristina Casals, Jesús R Huertas
Background: Hydroxytyrosol (HT) is a polyphenol found in olive oil that is known for its antioxidant effects. Here, we aimed to describe the effects of a low and high HT dose on the physical running capacity and redox state in both sedentary and exercised rats. Methods: Male Wistar rats were allocated into 6 groups: sedentary (SED; n  = 10); SED consuming 20 mg/kg/d HT (SED20; n  = 7); SED consuming 300 mg/kg/d HT (SED300; n = 7); exercised (EXE; n = 10); EXE consuming 20 mg/kg/d HT (EXE20; n = 10) and EXE consuming 300 mg/kg/d HT (EXE300; n = 10)...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29713250/effects-of-%C3%AE-alanine-supplementation-during-a-5-week-strength-training-program-a-randomized-controlled-study
#15
José Luis Maté-Muñoz, Juan H Lougedo, Manuel V Garnacho-Castaño, Pablo Veiga-Herreros, María Del Carmen Lozano-Estevan, Pablo García-Fernández, Fernando de Jesús, Jesús Guodemar-Pérez, Alejandro F San Juan, Raúl Domínguez
Background: β-Alanine (BA) is a non-essential amino acid that has been shown to enhance exercise performance. The purpose of this investigation was to determine if BA supplementation improved the adaptive response to five weeks of a resistance training program. Methods: Thirty healthy, strength-trained individuals were randomly assigned to the experimental groups placebo (PLA) or BA. Over 5 weeks of strength training, subjects in BA took 6.4 g/day of BA as 8 × 800 mg doses each at least 1...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29713249/effects-of-n-3-fatty-acids-and-exercise-on-oxidative-stress-parameters-in-type-2-diabetic-a-randomized-clinical-trial
#16
Ana Paula Trussardi Fayh, Katiuce Borges, Giovani Santos Cunha, Mauricio Krause, Ricardo Rocha, Paulo Ivo Homem de Bittencourt, José Cláudio Fonseca Moreira, Rogério Friedman, Juliane da Silva Rossato, Jõao Roberto Fernandes, Alvaro Reischak-Oliveira
Background: The relationship between diabetes and oxidative stress has been previously reported. Exercise represents a useful non-pharmacological strategy for the treatment in type 2 diabetic (T2DM) patients, but high intensity exercise can induce a transient inflammatory state and increase oxidative stress. Nutritional strategies that may contribute to the reduction of oxidative stress induced by acute exercise are necessary. The aim of this study was to examine if n-3 PUFA supplementation intervention can attenuate the inflammatory response and oxidative stress associated with high intensity exercise in this population...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29713248/development-and-validation-of-a-brief-general-and-sports-nutrition-knowledge-questionnaire-and-assessment-of-athletes-nutrition-knowledge
#17
Gina Louise Trakman, Adrienne Forsyth, Russell Hoye, Regina Belski
Background: The Nutrition for Sport Knowledge Questionnaire (NSKQ) is an 89-item, valid and reliable measure of sports nutrition knowledge (SNK). It takes 25 min to complete and has been subject to low completion and response rates. The aim of this study was to develop an abridged version of the NSKQ (A-NSKQ) and compare response rates, completion rates and NK scores of the NSKQ and A-NSKQ. Methods: Rasch analysis was used for the questionnaire validation. The sample ( n  = 181) was the same sample that was used in the validation of the full-length NSKQ...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29643758/prevalence-of-supplement-use-in-recreationally-active-kazakhstan-university-students
#18
Denis Vinnikov, Zhanna Romanova, Anar Dushpanova, Karashash Absatarova, Zhazira Utepbergenova
Background: Little is known about the supplements use and recreational sport practices in Kazakhstan university students. Therefore, the aim of this study was to ascertain supplements use prevalence and their predictors in this population. Methods: Cross-sectional survey of both undergraduate and graduate level students was completed in 2017 et al.-Farabi Kazakh National University, the largest higher institution in the country, from almost all Schools. A 45-item questionnaire was used to record physical activity, supplements use, lifestyle attributes (smoking, alcohol, sleep, etc...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29632452/prediction-equation-for-estimating-total-daily-energy-requirements-of-special-operations-personnel
#19
N D Barringer, S M Pasiakos, H L McClung, A P Crombie, L M Margolis
Background: Special Operations Forces (SOF) engage in a variety of military tasks with many producing high energy expenditures, leading to undesired energy deficits and loss of body mass. Therefore, the ability to accurately estimate daily energy requirements would be useful for accurate logistical planning. Purpose: Generate a predictive equation estimating energy requirements of SOF. Methods: Retrospective analysis of data collected from SOF personnel engaged in 12 different SOF training scenarios...
2018: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/29568244/herbal-medicine-for-sports-a-review
#20
REVIEW
Maha Sellami, Olfa Slimeni, Andrzej Pokrywka, Goran Kuvačić, Lawrence D Hayes, Mirjana Milic, Johnny Padulo
The use of herbal medicinal products and supplements has increased during last decades. At present, some herbs are used to enhance muscle strength and body mass. Emergent evidence suggests that the health benefits from plants are attributed to their bioactive compounds such as Polyphenols, Terpenoids, and Alkaloids which have several physiological effects on the human body. At times, manufacturers launch numerous products with banned ingredient inside with inappropriate amounts or fake supplement inducing harmful side effect...
2018: Journal of the International Society of Sports Nutrition
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