543 results match your criteria Journal of the International Society of Sports Nutrition JISSN [Journal]


Effects of placebo on bench throw performance of Paralympic weightlifting athletes: a pilot study.

J Int Soc Sports Nutr 2019 Feb 19;16(1). Epub 2019 Feb 19.

Faculdade de Educação Física e Dança, Universidade Federal de Goiás, Goiás, Brazil.

Background: The aim of the present study was to analyse the effects of placebo on bench throw performance in Paralympic weightlifting athletes.

Methods: The study involved four Paralympic weightlifting male athletes (age: 40.25 ± 9. Read More

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http://dx.doi.org/10.1186/s12970-019-0276-9DOI Listing
February 2019

The acute effects of caffeine intake on time under tension and power generated during the bench press movement.

J Int Soc Sports Nutr 2019 Feb 18;16(1). Epub 2019 Feb 18.

Department of Sports Training, Jerzy Kukuczka Academy of Physical Education, Katowice, Poland.

Background: The ability to generate high levels of power is one of the key factors determining success in many sport disciplines. Although there are studies confirming ergogenic effects of caffeine (CAF) on different physical and mental abilities, much controversy remains about its influence on power. The main goal of this study was to assess the effects of caffeine supplementation on time under tension (TUT) and the number of performed repetitions (REP). Read More

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http://dx.doi.org/10.1186/s12970-019-0275-xDOI Listing
February 2019

The effect of L-theanine supplementation on the immune system of athletes exposed to strenuous physical exercise.

J Int Soc Sports Nutr 2019 Feb 15;16(1). Epub 2019 Feb 15.

Department of Morphological and Health Sciences, Faculty of Physical Culture in Gorzów Wielkopolski, 13 Estkowskiego Str, 66-400, Gorzów Wielkopolski, Poland.

Background: The aim of this study was to analyze the response of selected components of the immune system in rowers to maximal physical exercise, and to verify if this response could be modulated by supplementation with L-theanine.

Method: The double-blind study included 20 members of the Polish Rowing Team. The subjects were randomly assigned to the supplemented group (n = 10), receiving 150 mg of L-theanine extract for 6 weeks, or to the placebo group (n = 10). Read More

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http://dx.doi.org/10.1186/s12970-019-0274-yDOI Listing
February 2019

Chocolate Milk versus carbohydrate supplements in adolescent athletes: a field based study.

J Int Soc Sports Nutr 2019 Feb 12;16(1). Epub 2019 Feb 12.

Department of Kinesiology and Health Education, The University of Texas at Austin, 2109 San Jacinto Blvd, Mail Stop D3700, Austin, TX, 78712-1204, USA.

Purpose: The purpose of this study is to translate laboratory-based research on beverage-based supplements to a naturalistic, field setting in adolescent athletes. To this end, we tested the effects of two commercially-available drinks on strength in a field-based setting with both male and female high school athletes completing a summer training program.

Methods: One hundred and three high school athletes completed the study (M age = 15. Read More

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http://dx.doi.org/10.1186/s12970-019-0272-0DOI Listing
February 2019

Rehydrating efficacy of maple water after exercise-induced dehydration.

J Int Soc Sports Nutr 2019 Feb 11;16(1). Epub 2019 Feb 11.

Health and Human Physiological Sciences Department, Skidmore College, 815 N. Broadway, Saratoga Springs, NY, 12866, USA.

Dehydration impairs physiological function and physical performance, thus understanding effective rehydration strategies is paramount. Despite growing interest in natural rehydrating beverages, no study has examined maple water (MW).

Purpose: To investigate the rehydrating efficacy of MW after exercise-induced dehydration. Read More

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http://dx.doi.org/10.1186/s12970-019-0273-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6371469PMC
February 2019

The effects of Shilajit supplementation on fatigue-induced decreases in muscular strength and serum hydroxyproline levels.

J Int Soc Sports Nutr 2019 Feb 6;16(1). Epub 2019 Feb 6.

Department of Nutrition and Health Sciences, Human Performance Laboratory, University of Nebraska - Lincoln, 110 Ruth Leverton Hall, Lincoln, NE, 68583-0806, USA.

Background: Shilajit is a safe, fluvic mineral complex exudate that is common to Ayurvedic medicine and is composed of fulvic acids, dibenzo-α-pyrones, proteins, and minerals. The purpose of this study was to examine the effects of 8 weeks of Shilajit supplementation at 250 mg·d (low dose) and 500 mg·d (high dose) versus placebo on maximal voluntary isometric contraction (MVIC) strength, concentric peak torque, fatigue-induced percent decline in strength, and serum hydroxyproline (HYP).

Methods: Sixty-three recreationally-active men ([Formula: see text] ± SD: 21. Read More

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http://dx.doi.org/10.1186/s12970-019-0270-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6364418PMC
February 2019

Citrus Aurantium and caffeine complex versus placebo on biomarkers of metabolism: a double blind crossover design.

J Int Soc Sports Nutr 2019 Feb 6;16(1). Epub 2019 Feb 6.

Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA, USA.

Backgrouond: The purpose of this study was to examine resting the metabolic response to the ingestion of a complex containing Citrus Aurantium + Caffeine (CA + C) and if its consumption influences metabolic recovery following a high-intensity anaerobic exercise bout in habitual caffeine users.

Methods: Ten physically active males (25.1 ± 3. Read More

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http://dx.doi.org/10.1186/s12970-019-0271-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6366059PMC
February 2019

Effects of ascorbic acid supplementation on oxidative stress markers in healthy women following a single bout of exercise.

J Int Soc Sports Nutr 2019 Jan 21;16(1). Epub 2019 Jan 21.

Department of Medical Technology, Faculty of Associated Medical Sciences, Chiang Mai University, Chiang Mai, 50200, Thailand.

Background: Ascorbic acid is a water-soluble chain breaking antioxidant. It scavenges free radicals and reactive oxygen species (ROS), which are produced during metabolic pathways. Exercise can produce an imbalance between ROS and antioxidants, leading to oxidative stress-related tissue damages. Read More

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http://dx.doi.org/10.1186/s12970-019-0269-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6341721PMC
January 2019

Effect of a short-term low fermentable oligiosaccharide, disaccharide, monosaccharide and polyol (FODMAP) diet on exercise-related gastrointestinal symptoms.

J Int Soc Sports Nutr 2019 Jan 15;16(1). Epub 2019 Jan 15.

Cambridge Centre for Sport and Exercise Sciences, School of Psychology and Sport Science, Anglia Ruskin University, Cambridge, UK.

Background: Research has demonstrated that low fermentable oligiosaccharide, disaccharide, monosaccharide and polyol (FODMAP) diets improve gastrointestinal (GI) symptoms in irritable bowel syndrome sufferers. Exercise-related GI issues are a common cause of underperformance, with current evidence focusing on the use of FODMAP approaches with recreationally competitive or highly trained athletes. However, there is a paucity of research exploring the potential benefit of FODMAP strategies to support healthy, recreational athletes who experience GI  issues during training. Read More

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http://dx.doi.org/10.1186/s12970-019-0268-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6332635PMC
January 2019
2 Reads

Acute caffeine supplementation in combat sports: a systematic review.

J Int Soc Sports Nutr 2018 Dec 29;15(1):60. Epub 2018 Dec 29.

Faculty of Health Sciences, Universidad Isabel I, Burgos, Spain.

Caffeine used as a supplement has been shown to improve physical and cognitive performance in several sport modalities due to its effects on the central nervous system. This review assesses the direct effects of caffeine supplementation on performance in combat sports. Using the PRISMA (Preferred Reporting Items for Systematic Review and Meta-Analysis) guidelines, relevant studies were identified through the Medline, Scopus and SPORTDiscus databases. Read More

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http://dx.doi.org/10.1186/s12970-018-0267-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6310931PMC
December 2018
1 Read

The effect of two β-alanine dosing strategies on 30-minute rowing performance: a randomized, controlled trial.

J Int Soc Sports Nutr 2018 Dec 18;15(1):59. Epub 2018 Dec 18.

Cambridge Centre for Sport and Exercise Sciences, Anglia Ruskin University, Cambridge, UK.

Background: β-alanine (βA) supplementation has been shown to increase intramuscular carnosine content and subsequent high-intensity performance in events lasting < 4 minutes (min), which may be dependent on total, as opposed to daily, dose. The ergogenic effect of βA has also been demonstrated for 2000-m rowing performance prompting interest in whether βA may be beneficial for sustained aerobic exercise. This study therefore investigated the effect of two βA dosing strategies on 30-min rowing and subsequent sprint performance. Read More

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http://dx.doi.org/10.1186/s12970-018-0266-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6299666PMC
December 2018

Efficacy of a nootropic spearmint extract on reactive agility: a randomized, double-blind, placebo-controlled, parallel trial.

J Int Soc Sports Nutr 2018 Dec 12;15(1):58. Epub 2018 Dec 12.

Kemin Foods L.C, Des Moines, IA, USA.

Background: Proprietary spearmint extract (PSE) containing a minimum 14.5% rosmarinic acid and 24% total phenolic content, has evinced positive effects on cognition in individuals aged 50-70 with memory impairment after chronic supplementation. To address the growing interest in connecting mental and physical performance, the present study examined whether the nootropic effects of PSE translate into changes in reactive agility following daily supplementation with PSE. Read More

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http://dx.doi.org/10.1186/s12970-018-0264-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6291964PMC
December 2018

Priority use of medium-chain fatty acids during high-intensity exercise in cross-country skiers.

J Int Soc Sports Nutr 2018 Dec 10;15(1):57. Epub 2018 Dec 10.

Department of Ecological and Medical Physiology, Ural Branch, Head of Department, Institute of Physiology, Russian Academy of Sciences, Pervomaiskaya av.50, Syktyvkar, 167982, Russia.

Background: One of the topics discussed in sports science is the use of medium-chain saturated fat as an energy-saving nutrient additive when approaching high-intensity exercise. The purpose of this study was to compare the blood concentrations of medium-chain and long-chain fatty acids (FAs) across different intensity loads.

Methods: Fifteen male highly trained athletes from the Russian cross-country skiing team participated in the study. Read More

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http://dx.doi.org/10.1186/s12970-018-0265-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288941PMC
December 2018

Metabolic impact of protein feeding prior to moderate-intensity treadmill exercise in a fasted state: a pilot study.

J Int Soc Sports Nutr 2018 Nov 29;15(1):56. Epub 2018 Nov 29.

Exercise and Performance Nutrition Laboratory, School of Health Sciences, Lindenwood University, St. Charles, MO, 63301, USA.

Background: Augmenting fat oxidation is a primary goal of fitness enthusiasts and individuals desiring to improve their body composition. Performing aerobic exercise while fasted continues to be a popular strategy to achieve this outcome, yet little research has examined how nutritional manipulations influence energy expenditure and/or fat oxidation during and after exercise. Initial research has indicated that pre-exercise protein feeding may facilitate fat oxidation while minimizing protein degradation during exercise, but more research is needed to determine if the source of protein further influences such outcomes. Read More

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http://dx.doi.org/10.1186/s12970-018-0263-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6267781PMC
November 2018
2 Reads

Estimation of energy balance and training volume during Army Initial Entry Training.

J Int Soc Sports Nutr 2018 Nov 28;15(1):55. Epub 2018 Nov 28.

Warrior Research Center, School of Kinesiology, Auburn University, 301 Wire Road, Auburn, AL, 36849, USA.

Background: Adequate dietary intake is important for promoting adaptation and prevention of musculoskeletal injury in response to large volumes of physical training such as Army Initial Entry Training (IET). The purpose of this study was to evaluate training volume and dietary intake and estimate energy balance in Army IET soldiers.

Methods: Dietary intake was assessed by collecting diet logs for three meals on each of three, non-consecutive days during the first week of IET. Read More

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http://dx.doi.org/10.1186/s12970-018-0262-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6264031PMC
November 2018

Correction to: PAKs supplement improves immune status and body composition but not muscle strength in resistance trained individuals.

J Int Soc Sports Nutr 2018 Nov 27;15(1):54. Epub 2018 Nov 27.

Institute of Science in Nutrition and Performance, São Paulo, Brazil.

The original article [1] contains an error whereby the author, Frederico G Romero's name is displayed incorrectly; the correct spelling is instead displayed in this Correction article. Read More

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http://dx.doi.org/10.1186/s12970-018-0261-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6260736PMC
November 2018

Exercise training alters the glycemic response to carbohydrate and is an important consideration when evaluating dietary carbohydrate intake.

J Int Soc Sports Nutr 2018 Oct 26;15(1):53. Epub 2018 Oct 26.

Stautzenberger College, 1796 Indian Wood Circle, Maumee, OH, 43537, USA.

Carbohydrates raise insulin concentrations in blood. Exercise decreases the insulin response to carbohydrate infusion and is beneficial in reducing postprandial glucose and insulin concentrations. This is important as there has been recent information suggesting postprandial insulin concentrations are linked to obesity (Carbohydrate-Insulin Model of Obesity). Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0259-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6204040PMC
October 2018
13 Reads

Combined extracts of Garcinia mangostana fruit rind and Cinnamomum tamala leaf supplementation enhances muscle strength and endurance in resistance trained males.

J Int Soc Sports Nutr 2018 Oct 22;15(1):50. Epub 2018 Oct 22.

Laila Nutraceuticals R&D Center, 181/2, JRD Tata Industrial Estate, Kanur, Vijayawada, Andhra Pradesh, 520007, India.

Background: A proprietary composition GMCT contains extracts of two popular Asian herbs viz., Garcinia mangostana (GM) fruit rind and Cinnamomum tamala (CT) leaf. We systematically evaluated physical performance and muscle strength enhancing ability of GMCT in a preclinical mouse model followed by a 42-days double-blind placebo controlled human trial in resistance trained adult males. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0257-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6196563PMC
October 2018
18 Reads

The acute effects of plyometric and sled towing stimuli with and without caffeine ingestion on vertical jump performance in professional soccer players.

J Int Soc Sports Nutr 2018 Oct 22;15(1):51. Epub 2018 Oct 22.

Muscle Physiology and Human Performance Research Group, Center of Physical Education and Sports, Federal University of Espirito Santo, Av. Fernando Ferrari, 514, Campus Universitário, Goiabeiras, Vitória, ES, 29075-810, Brazil.

Background: Post-activation potentiation (PAP) is the phenomenon by which muscular performance is enhanced in response to a conditioning stimulus. PAP has typically been evidenced via improved counter movement jump (CMJ) performance. This study examined the effects of PAP, with and without prior caffeine ingestion, on CMJ performance. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0258-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6198523PMC
October 2018
11 Reads

Effects of a single dose of beetroot juice on cycling time trial performance at ventilatory thresholds intensity in male triathletes.

J Int Soc Sports Nutr 2018 Oct 4;15(1):49. Epub 2018 Oct 4.

Laboratory of Biomechanics and Exercise Physiology, Department of Physical Activity and Sports Science, Alfonso X El Sabio University, Avenida Universidad, 1, 28691 Villanueva de la Cañada, Madrid, Spain.

Background: Beetroot juice (BJ) is classified as a high-level supplement for improving sports performance. There is some controversy over the benefits of BJ supplementation for endurance exercise performance, especially when referring to well-trained athletes. This study examines the effects of acute BJ supplementation on cardioventilatory responses, exercise economy/efficiency, slow component of oxygen uptake, time trial performance, blood lactate, energy consumption, and carbohydrate and fat oxidation. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0255-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6172780PMC
October 2018
4 Reads

Metabolomics profiling of xenobiotics in elite athletes: relevance to supplement consumption.

J Int Soc Sports Nutr 2018 Sep 27;15(1):48. Epub 2018 Sep 27.

Anti Doping Laboratory Qatar, ADLQ, Sports City, P.O Box 27775, Doha, Qatar.

Background: Supplements are widely used among elite athletes to maintain health and improve performance. Despite multiple studies investigating use of dietary supplements by athletes, a comprehensive profiling of serum supplement metabolites in elite athletes is still lacking. This study aims to analyze the presence of various xenobiotics in serum samples from elite athletes of different sports, focusing on metabolites that potentially originate from nutritional supplements. Read More

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http://dx.doi.org/10.1186/s12970-018-0254-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6161339PMC
September 2018
11 Reads
1.908 Impact Factor

The effect of chronic soluble keratin supplementation in physically active individuals on body composition, blood parameters and cycling performance.

J Int Soc Sports Nutr 2018 Sep 27;15(1):47. Epub 2018 Sep 27.

School of Sport and Exercise, Massey University, Palmerston North, New Zealand.

Background: Keratins are structural, thiol-rich proteins, which comprise 90% of total poultry feather weight. Their favourable amino acid profile suggests the potential for use as a protein source and ergogenic aid for endurance athletes, following treatment to increase digestibility. This study investigated whether 4 weeks of soluble keratin (KER) consumption (0. Read More

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http://dx.doi.org/10.1186/s12970-018-0251-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6161438PMC
September 2018
2 Reads

Comparison of a sports-hydration drink containing high amylose starch with usual hydration practice in Australian rules footballers during intense summer training.

J Int Soc Sports Nutr 2018 Sep 21;15(1):46. Epub 2018 Sep 21.

Flinders Centre for Innovation in Cancer, Flinders University, Adelaide, SA, Australia.

Background: Fluid deficits exceeding 1.6% can lead to physical and cognitive impairment in athletes. Sport drinks used by athletes are often hyper-osmolar but this is known to be suboptimal for rehydration in medical settings and does not utilize colonic absorptive capacity. Read More

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http://dx.doi.org/10.1186/s12970-018-0253-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6150988PMC
September 2018
2 Reads

Biotin and chromium histidinate improve glucose metabolism and proteins expression levels of IRS-1, PPAR-γ, and NF-κB in exercise-trained rats.

J Int Soc Sports Nutr 2018 Sep 15;15(1):45. Epub 2018 Sep 15.

Department of Animal Nutrition, Faculty of Veterinary Medicine, Firat University, Elazig, Turkey.

Background: Chromium histidinate (CrHis) and biotin are micronutrients commonly used to improve health by athletes and control glycaemia by patients with diabetes. This study investigates the effects of 8-week regular exercise training in rats together with dietary CrHis and biotin supplementation on glucose, lipids and transaminases levels, as well as protein expression levels of peroxisome proliferator-activated receptor gamma (PPAR-γ), insulin receptor substrate-1 (IRS-1) and nuclear transcription factor kappa B (NF-κB).

Methods: A total of 56 male Wistar rats were randomly divided into 8 groups of 7 animals each and treated as follows: Control, CrHis, Biotin, CrHis+Biotin, Exercise, CrHis+Exercise, Biotin+Exercise, and CrHis+Biotin+Exercise. Read More

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http://dx.doi.org/10.1186/s12970-018-0249-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6139124PMC
September 2018
2 Reads

Dietary intake of professional Australian football athletes surrounding body composition assessment.

J Int Soc Sports Nutr 2018 Sep 14;15(1):43. Epub 2018 Sep 14.

Department of Rehabilitation, Nutrition and Sport, La Trobe University, Bundoora, VIC, Australia.

Background: Sports Dietitians aim to assist in improving performance by developing nutrition knowledge (NK), enhancing dietary intake and optimising body composition of athletes. In a high-pressure environment, it is important to identify factors that may compromise an athlete's nutrition status. Body composition assessments are regularly undertaken in sport to provide feedback on training adaptions; however, no research has explored the impact of these assessments on the dietary intake of professional athletes. Read More

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http://dx.doi.org/10.1186/s12970-018-0248-5DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6137941PMC
September 2018
3 Reads

Development and validation of a dietary screener for carbohydrate intake in endurance athletes.

J Int Soc Sports Nutr 2018 Sep 14;15(1):44. Epub 2018 Sep 14.

Institute of Nutrition and Functional Foods (INAF), Pavillon des Services, Laval University, 2440, Hochelaga Boulevard, Quebec City, G1V 0A6, Canada.

Background: Studies have shown that the majority of endurance athletes do not achieve the minimal recommended carbohydrate (CHO) intake of 6 g/kg of body weight (BW), with potentially negative impacts on recovery and performance. The purpose of this study was to develop and validate a rapid and easy to use dietary screener to identify athletes who do and do not achieve a CHO intake > 6 g/kg BW in the context of endurance sports.

Methods: The dietary screener was developed using multiple logistic regression modeling of data from a sample of 1571 non-athlete adults (826 women and 745 men, mean age 44. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0250-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6137928PMC
September 2018
7 Reads

A fat mass and obesity-associated gene polymorphism influences fat mass in exercise-trained individuals.

J Int Soc Sports Nutr 2018 Aug 8;15(1):40. Epub 2018 Aug 8.

Department of Psychology and Neuroscience, Nova Southeastern University, Davie, FL, USA.

Background: A single nucleotide polymorphism (SNP) in the fat mass and obesity-associated (FTO) gene is a strong predictor of obesity in humans. The FTO SNP (rs1421085) results in a T to C nucleotide substitution that may result in an increased risk for obesity in individuals who carry at least one C allele. The purpose of this investigation was to characterize the FTO genotype in a cohort of exercise-trained men and women. Read More

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http://dx.doi.org/10.1186/s12970-018-0246-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6102834PMC
August 2018
6 Reads

Citrulline malate supplementation does not improve German Volume Training performance or reduce muscle soreness in moderately trained males and females.

J Int Soc Sports Nutr 2018 Aug 10;15(1):42. Epub 2018 Aug 10.

Food and Nutrition group, Sheffield Business School, Sheffield Hallam University, Stoddard Building, City Campus, Sheffield, UK.

Background: Use of supplements to aid performance is common practice amongst recreationally active individuals, including those without a sufficient evidence base. This investigation sought to assess whether acute supplementation with 8 g of citrulline malate (CM) (1.11: 1 ratio) would improve anaerobic performance. Read More

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http://dx.doi.org/10.1186/s12970-018-0245-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6086018PMC
August 2018
4 Reads

Multi-ingredient pre-workout supplements, safety implications, and performance outcomes: a brief review.

J Int Soc Sports Nutr 2018 Aug 8;15(1):41. Epub 2018 Aug 8.

School of Health Sciences, Department of Exercise Science, Lindenwood University, St. Charles, MO, 63301, USA.

In recent years, a new class of dietary supplements called multi-ingredient pre-workout supplements (MIPS) has increased in popularity. These supplements are intended to be taken prior to exercise and typically contain a blend of ingredients such as caffeine, creatine, beta-alanine, amino acids, and nitric oxide agents, the combination of which may elicit a synergistic effect on acute exercise performance and subsequent training adaptations compared to single ingredients alone. Therefore, the purpose of this article was to review the theoretical rationale and available scientific evidence assessing the potential ergogenic value of acute and chronic ingestion of MIPS, to address potential safety concerns surrounding MIPS supplementation, and to highlight potential areas for future research. Read More

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http://dx.doi.org/10.1186/s12970-018-0247-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6083567PMC

Efficacy of heat-killed Lactococcus lactis JCM 5805 on immunity and fatigue during consecutive high intensity exercise in male athletes: a randomized, placebo-controlled, double-blinded trial.

J Int Soc Sports Nutr 2018 Aug 2;15(1):39. Epub 2018 Aug 2.

Department of Cardiovascular Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan.

Background: Lactococcus lactis JCM 5805 (LC-Plasma) is a unique lactic acid bacteria (LAB) which activates plasmacytoid dendritic cells (pDC). We aimed to evaluate the effect of LC-Plasma on dendritic cell (DC) activity and subjective indices of upper respiratory tract infections (URTI) and fatigue in athletes under high intensity exercise.

Methods: We conducted a randomized, placebo-controlled, double-blinded trial. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0244-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6090876PMC
August 2018
14 Reads

ISSN exercise & sports nutrition review update: research & recommendations.

J Int Soc Sports Nutr 2018 Aug 1;15(1):38. Epub 2018 Aug 1.

Exercise & Sports Nutrition Lab, Human Clinical Research Facility, Texas A&M University, College Station, TX, USA.

Background: Sports nutrition is a constantly evolving field with hundreds of research papers published annually. In the year 2017 alone, 2082 articles were published under the key words 'sport nutrition'. Consequently, staying current with the relevant literature is often difficult. Read More

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http://dx.doi.org/10.1186/s12970-018-0242-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6090881PMC
August 2018
16 Reads

The effects of chronic betaine supplementation on body composition and performance in collegiate females: a double-blind, randomized, placebo controlled trial.

J Int Soc Sports Nutr 2018 Jul 31;15(1):37. Epub 2018 Jul 31.

Regulatory & Scientific Affairs, DuPont Nutrition & Health Experimental Station, Wilmington, DE, USA.

Background: Betaine supplementation has been shown to improve body composition and some metrics of muscular performance in young men; but, whether betaine enhances body composition or performance in female subjects is currently unknown. Therefore, the purpose of this study was to investigate the interaction between resistance training adaptation and chronic betaine supplementation in females.

Methods: Twenty-three young women (21. Read More

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http://dx.doi.org/10.1186/s12970-018-0243-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6069865PMC
July 2018
4 Reads

Correction to: The effect of acute vs chronic magnesium supplementation on exercise and recovery on resistance exercise, blood pressure and total peripheral resistance on normotensive adults.

Authors:
L S Kass F Poeira

J Int Soc Sports Nutr 2018 Jul 25;15(1):36. Epub 2018 Jul 25.

University of Hertfordshire, School of Life and Medical Science, College Lane, Hatfield, Hertfordshire, AL10 9AB, UK.

The original article [1] contains an error whereby the datum value of '17.7%' in both the Abstract and the first line of the Bench press sub-section of the Results section is incorrect. Read More

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http://dx.doi.org/10.1186/s12970-018-0239-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6060451PMC

The impact of supplementation with pomegranate fruit (Punica granatum L.) juice on selected antioxidant parameters and markers of iron metabolism in rowers.

J Int Soc Sports Nutr 2018 Jul 24;15(1):35. Epub 2018 Jul 24.

Department of Morphological and Health Sciences, Faculty of Physical Culture in Gorzów Wlkp. Poland, 13 Estkowskiego Str., 66 - 400, Gorzów Wlkp, Poland.

Background: The aim of this study was to analyse the effect of pomegranate juice (POM) supplementation on the levels of selected pro-inflammatory cytokines, hepcidin and markers of iron metabolism in well-trained rowers.

Method: The double-blind placebo-controlled study included 19 members of the Polish Rowing Team. The athletes were randomised into the supplemented group (n = 10), receiving 50 ml of standardised POM daily for two months, or the placebo group (n = 9). Read More

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http://dx.doi.org/10.1186/s12970-018-0241-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6057087PMC

The influence of citrus aurantium and caffeine complex versus placebo on the cardiac autonomic response: a double blind crossover design.

J Int Soc Sports Nutr 2018 Jul 24;15(1):34. Epub 2018 Jul 24.

Department of Exercise Science and Sport Management, Kennesaw State University, Kennesaw, GA, USA.

Background: The purpose of this study was to examine the resting cardiac autonomic nervous system's response to the ingestion of a complex containing Citrus aurantium + Caffeine (CA + C) and its influence on recovery following a high-intensity anaerobic exercise bout in habitual caffeine users.

Methods: Ten physically active males (25.1 ± 3. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-018-
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http://dx.doi.org/10.1186/s12970-018-0240-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6057091PMC
July 2018
3 Reads

Quality of life of female and male vegetarian and vegan endurance runners compared to omnivores - results from the NURMI study (step 2).

J Int Soc Sports Nutr 2018 Jul 17;15(1):33. Epub 2018 Jul 17.

Centre for Research and Knowledge Management, Pedagogical University Tyrol, Feldstraße 1/II, 6010, Innsbruck, Austria.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0237-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6050691PMC
July 2018
22 Reads

β-Alanine supplementation increased physical performance and improved executive function following endurance exercise in middle aged individuals.

J Int Soc Sports Nutr 2018 Jul 11;15(1):32. Epub 2018 Jul 11.

Department of Exercise and Nutrition Sciences, University at Buffalo, Buffalo, USA.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0238-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6042354PMC
July 2018
9 Reads

Efficacy of ketogenic diet on body composition during resistance training in trained men: a randomized controlled trial.

J Int Soc Sports Nutr 2018 Jul 9;15(1):31. Epub 2018 Jul 9.

Human Kinetics and Body Composition Laboratory, Faculty of Education Sciences, University of Málaga, Málaga, Spain.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0236-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6038311PMC
July 2018
2 Reads

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.

J Int Soc Sports Nutr 2018 Jun 27;15(1):30. Epub 2018 Jun 27.

Exercise and Biochemical Nutritional Lab, Department of Health, Human Performance, and Recreation, Baylor University, Waco, TX, USA.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0235-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6020314PMC
June 2018
7 Reads

Low-fat diet, and medium-fat diets containing coconut oil and soybean oil exert different metabolic effects in untrained and treadmill-trained mice.

J Int Soc Sports Nutr 2018 Jun 18;15(1):29. Epub 2018 Jun 18.

Department of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0234-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6006686PMC
June 2018
15 Reads

Serum concentration of cobalt, molybdenum and zinc in aerobic, anaerobic and aerobic-anaerobic sportsmen.

J Int Soc Sports Nutr 2018 Jun 13;15(1):28. Epub 2018 Jun 13.

Sport Sciences Faculty, University of Extremadura, Avenida de la Universidad s/n 10003, Cáceres, Spain.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0233-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6001005PMC
June 2018
4 Reads

Individualized hydration plans improve performance outcomes for collegiate athletes engaging in in-season training.

J Int Soc Sports Nutr 2018 Jun 4;15(1):27. Epub 2018 Jun 4.

Department of Health Sciences, Merrimack College, O'Reilly Hall, Room 414, 315 Turnpike Street, North Andover, MA, 01845, USA.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0230-2DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5987390PMC
June 2018
7 Reads

Impact of a purported nootropic supplementation on measures of mood, stress, and marksmanship performance in U.S. active duty soldiers.

J Int Soc Sports Nutr 2018 May 31;15(1):26. Epub 2018 May 31.

Department of Defense Joint Trauma System, 3698 Chambers Road, Joint Base San Antonio-Fort Sam Houston, San Antonio, TX, 78234, USA.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0229-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5984413PMC
May 2018
2 Reads

Enhanced 400-m sprint performance in moderately trained participants by a 4-day alkalizing diet: a counterbalanced, randomized controlled trial.

J Int Soc Sports Nutr 2018 May 31;15(1):25. Epub 2018 May 31.

Department of Sports Medicine and Sports Nutrition, Ruhr-University Bochum, Gesundheitscampus Nord 10, 44801, Bochum, Germany.

Background: Sodium bicarbonate (NaHCO) 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. Read More

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http://dx.doi.org/10.1186/s12970-018-0231-1DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5984464PMC
May 2018
1 Read

Daytime and nighttime casein supplements similarly increase muscle size and strength in response to resistance training earlier in the day: a preliminary investigation.

J Int Soc Sports Nutr 2018 May 15;15(1):24. Epub 2018 May 15.

Nutrition and Food Sciences Department, Texas Woman's University, 304 Administration Drive, Denton, TX, 76204, USA.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0228-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5952515PMC

The effect of carbohydrate mouth rinse on performance, biochemical and psychophysiological variables during a cycling time trial: a crossover randomized trial.

J Int Soc Sports Nutr 2018 2;15:23. Epub 2018 May 2.

1Graduate Progrtam in Physical Education, Federal University of Rio Grande do Norte, Avenida senador Salgado Filho 3000, Campus Universitário, Lagoa Nova, Natal, RN Brazil.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0225-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5932899PMC
July 2018
11 Reads

Effect of bilberry juice on indices of muscle damage and inflammation in runners completing a half-marathon: a randomised, placebo-controlled trial.

J Int Soc Sports Nutr 2018 2;15:22. Epub 2018 May 2.

2Academy of Sport and Physical Activity, Sheffield Hallam University, S10 2BP, Sheffield, UK.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0227-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5930783PMC
July 2018
3 Reads

Creatine-electrolyte supplementation improves repeated sprint cycling performance: A double blind randomized control study.

J Int Soc Sports Nutr 2018 2;15:21. Epub 2018 May 2.

Kinesiology Program, Department of Health and Human Development, Western Washington University, Carver 201L, MS 9067, 516 High Street, Bellingham, WA 98225 USA.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0226-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5930494PMC
July 2018
1 Read

Effects of hydroxytyrosol dose on the redox status of exercised rats: the role of hydroxytyrosol in exercise performance.

J Int Soc Sports Nutr 2018 27;15:20. Epub 2018 Apr 27.

"José Mataix" Institute of Nutrition and Food Technology, Biomedical Research Centre, Department of Physiology, University of Granada, laboratory 116. Av. del Conocimiento s/n, Armilla, 18100 Granada, Spain.

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;  = 10); SED consuming 20 mg/kg/d HT (SED20;  = 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). Read More

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http://dx.doi.org/10.1186/s12970-018-0221-3DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5921979PMC
July 2018
8 Reads

Effects of β-alanine supplementation during a 5-week strength training program: a randomized, controlled study.

J Int Soc Sports Nutr 2018 25;15:19. Epub 2018 Apr 25.

9Department of Physical Activity and Sport Sciences, Faculty of Health Sciences, Alfonso X El Sabio University, Avda, Universidad 1, Building C, 3rd floor, Office C-A12, Villanueva de la Cañada, 28691 Madrid, Spain.

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. Read More

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http://dx.doi.org/10.1186/s12970-018-0224-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5918575PMC
July 2018
4 Reads