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


Supplementation of eicosapentaenoic acid-rich fish oil attenuates muscle stiffness after eccentric contractions of human elbow flexors.

J Int Soc Sports Nutr 2019 Apr 15;16(1):19. Epub 2019 Apr 15.

Faculty of Bioscience and Applied Chemistry, Hosei University, 3-7-2, Kajino, Koganei, Tokyo, Japan.

Background: This study aimed to investigate the effect of supplementation of fish oil rich in eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) on the damage of the biceps brachii after eccentric contractions (ECCs) of the elbow flexors, particularly focusing on muscle stiffness.

Methods: Sixteen men were included in this double-blind, placebo-controlled, parallel design study and the participants were randomly assigned to the EPA and DHA supplement group (EPA, n = 8) and placebo group (PL, n = 8). They consumed either EPA 600 mg and DHA 260 mg per day or placebo supplement for 8 weeks prior to exercise. Read More

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http://dx.doi.org/10.1186/s12970-019-0283-xDOI Listing

Effect of sodium bicarbonate ingestion during 6 weeks of HIIT on anaerobic performance of college students.

J Int Soc Sports Nutr 2019 Apr 15;16(1):18. Epub 2019 Apr 15.

College of Kinesiology, Beijing Sport University, Beijing, BJ, China.

Background: Past studies have found that sodium bicarbonate ingestion prior to exercise has a performance-enhancing effect on high-intensity exercise. The aim of this study was to investigate the effects of continuous sodium bicarbonate (NaHCO) supplementation on anaerobic performance during six weeks of high-intensity interval training (HIIT).

Methods: Twenty healthy college-age male participants were randomly assigned to either the HCO group (SB) or the placebo group (PL), with 10 subjects in each group. Read More

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http://dx.doi.org/10.1186/s12970-019-0285-8DOI Listing

Effect of caffeinated gum on a battery of rugby-specific tests in trained university-standard male rugby union players.

J Int Soc Sports Nutr 2019 Apr 11;16(1):17. Epub 2019 Apr 11.

Food Group, Sheffield Business School, Sheffield Hallam University, Sheffield, UK.

Background: Caffeine has been shown to enhance strength, power and endurance, characteristics that underpin performance in rugby. Caffeinated gum has attracted interest as a novel vehicle for delivering caffeine, because absorption of caffeine from gum is quick. Rapid absorption of caffeine may be useful during rugby matches when there is limited time for supplementation such as at half-time or when substitutes enter play. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-019-
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http://dx.doi.org/10.1186/s12970-019-0286-7DOI Listing
April 2019
8 Reads

Effect of a four-week ketogenic diet on exercise metabolism in CrossFit-trained athletes.

J Int Soc Sports Nutr 2019 Apr 5;16(1):16. Epub 2019 Apr 5.

Institute of Human Nutrition and Dietetics, Poznan University of Life Sciences, Wojska Polskiego 31, 60-624, Poznań, Poland.

Background: The ketogenic diet is becoming a popular nutritional model among athletes. However, the relationship between its use and metabolism during exercise seems to have not been fully investigated.

Methods: The aim of the study was to assess the effects of a four-week ketogenic diet (KD) on fat and carbohydrate (CHO) utilization during an incremental cycling test (ICT) in CrossFit-trained female (n = 11) and male (n = 11) athletes. Read More

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http://dx.doi.org/10.1186/s12970-019-0284-9DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6451242PMC
April 2019
2 Reads

Fluid type influences acute hydration and muscle performance recovery in human subjects.

J Int Soc Sports Nutr 2019 Apr 4;16(1):15. Epub 2019 Apr 4.

Department of Physiology, University of Arizona, Tucson, AZ, 85721, USA.

Background: Exercise and heat trigger dehydration and an increase in extracellular fluid osmolality, leading to deficits in exercise performance and thermoregulation. Evidence from previous studies supports the potential for deep-ocean mineral water to improve recovery of exercise performance post-exercise. We therefore wished to determine whether acute rehydration and muscle strength recovery was enhanced by deep-ocean mineral water following a dehydrating exercise, compared to a sports drink or mountain spring water. Read More

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http://dx.doi.org/10.1186/s12970-019-0282-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6449982PMC
April 2019
2 Reads

Effects of a polysaccharide-based multi-ingredient supplement on salivary immunity in non-elite marathon runners.

J Int Soc Sports Nutr 2019 Mar 25;16(1):14. Epub 2019 Mar 25.

Laboratory of Experimental Immunology, Biomedical Research Institute Sant Pau (IIB Sant Pau), Hospital de la Santa Creu i Sant Pau, Barcelona, Catalonia, Spain.

Background: Extreme exercise may alter the innate immune system. Glycans are involved in several biological processes including immune system regulation. However, limited data regarding the impact of glycan supplementation on immunological parameters after strenuous exercise are available. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-019-
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http://dx.doi.org/10.1186/s12970-019-0281-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6434855PMC
March 2019
1 Read

Effects of medium-term green tea extract supplementation combined with CrossFit workout on blood antioxidant status and serum brain-derived neurotrophic factor in young men: a pilot study.

J Int Soc Sports Nutr 2019 Mar 21;16(1):13. Epub 2019 Mar 21.

Department of Biochemistry, Poznan University of Physical Education, Poznań, Poland.

Background: Potential health benefits are attributed to the antioxidant properties of green tea polyphenolic compounds. The main aim of the study was to evaluate the effects of a six-week green tea extract (GTE) supplementation combined with CrossFit workout on blood antioxidant status and serum brain-derived neurotrophic factor (BDNF) in men.

Methods: Sixteen young males involved in CrossFit training were randomized into two groups supplemented with GTE or placebo for six weeks. Read More

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http://dx.doi.org/10.1186/s12970-019-0280-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6429762PMC

Physiological- and performance-related effects of acute olive oil supplementation at moderate exercise intensity.

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

Department of Physiological Sciences, School of Medicine, Universitat de Barcelona (UB), C. Feixa Llarga, s/n, Hospitalet de Llobregat, 08907, Spain.

Background: The consumption of olive oil is associated with a diminished risk of cardiovascular disorders and mortality, but the impact of olive oil supplementation on endurance performance is still unclear. Since the beneficial effects of olive oil are observed at a systemic level, its effectiveness may not be precisely measured through the commonly registered maximal and threshold values of some physiological and performance parameters. In contrast, we suggest evaluating it through variables able to capture the coordinated behaviour of physiological systems. Read More

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http://dx.doi.org/10.1186/s12970-019-0279-6DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6397506PMC
March 2019
1 Read
1.908 Impact Factor

Development of a questionnaire to assess dietary restrictions runners use to mitigate gastrointestinal symptoms.

J Int Soc Sports Nutr 2019 Feb 28;16(1):11. Epub 2019 Feb 28.

Sport Medicine Centre, University of Calgary, 2500 University Drive NW, Calgary, Alberta, T2N 1N4, Canada.

Background: Exercise induced gastrointestinal (GI) symptoms can plague athletes, especially runners. Sport nutrition recommendations are nutrient rather than foods focused and do not adequately address strategies to reduce GI symptoms. The objective was to develop a valid and reliable questionnaire to evaluate pre-training and pre-racing voluntary food restrictions/choices, reasons for avoiding foods, and gastrointestinal symptoms in endurance runners. Read More

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https://jissn.biomedcentral.com/articles/10.1186/s12970-019-
Publisher Site
http://dx.doi.org/10.1186/s12970-019-0278-7DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6396487PMC
February 2019
8 Reads

The effects of environmental hypoxia on substrate utilisation during exercise: a meta-analysis.

J Int Soc Sports Nutr 2019 Feb 27;16(1):10. Epub 2019 Feb 27.

Institute for Sport, Physical Activity and Leisure, Leeds Beckett University, Leeds, LS6 3QS, UK.

Background: A better understanding of hypoxia-induced changes in substrate utilisation can facilitate the development of nutritional strategies for mountaineers, military personnel and athletes during exposure to altitude. However, reported metabolic responses are currently divergent. As such, this systematic review and meta-analysis aims to determine the changes in substrate utilisation during exercise in hypoxia compared with normoxia and identify study characteristics responsible for the heterogeneity in findings. Read More

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http://dx.doi.org/10.1186/s12970-019-0277-8DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6391781PMC
February 2019
1 Read

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
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6381705PMC
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
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6379960PMC
February 2019
2 Reads

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
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6377763PMC
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
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6373093PMC
February 2019
2 Reads

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
1 Read

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
5 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
1 Read

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
18 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
35 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
17 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
3 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
3 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-
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http://dx.doi.org/10.1186/s12970-018-0250-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6137928PMC
September 2018
9 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
7 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
5 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
22 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-
Publisher Site
http://dx.doi.org/10.1186/s12970-018-0240-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6057091PMC
July 2018
5 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
10 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
8 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
19 Reads