Articles

The acute effects of multi-ingredient pre-workout ingestion on strength performance, lower body power, and anaerobic capacity

Multi-ingredient pre-workout supplements (MIPS) are popular among resistance trained individuals. Previous research has indicated that acute MIPS ingestion may increase muscular endurance when using a hypertro...

Authors: Andrew R. Jagim, Margaret T. Jones, Glenn A. Wright, Carly St. Antoine, Attila Kovacs and Jonathan M. Oliver

Muscle contraction velocity, strength and power output changes following different degrees of hypohydration in competitive olympic combat sports

It is habitual for combat sports athletes to lose weight rapidly to get into a lower weight class. Fluid restriction, dehydration by sweating (sauna or exercise) and the use of diuretics are among the most rec...

Authors: J. G. Pallarés, A. Martínez-Abellán, J. M. López-Gullón, R. Morán-Navarro, E. De la Cruz-Sánchez and R. Mora-Rodríguez

Protein intake during training sessions has no effect on performance and recovery during a strenuous training camp for elite cyclists

Training camps for top-class endurance athletes place high physiological demands on the body. Focus on optimizing recovery between training sessions is necessary to minimize the risk of injuries and improve ad...

Authors: Mette Hansen, Jens Bangsbo, Jørgen Jensen, Matilde Krause-Jensen, Bo Martin Bibby, Ove Sollie, Ulrika Andersson Hall and Klavs Madsen

Regulation of mTORC1 by growth factors, energy status, amino acids and mechanical stimuli at a glance

The mechanistic/mammalian target of rapamycin complex 1 (mTORC1) plays a pivotal role in the regulation of skeletal muscle protein synthesis. Activation of the complex leads to phosphorylation of two important...

Authors: Peter Bond

Effects of combined β-hydroxy-β-methylbutyrate (HMB) and whey protein ingestion on symptoms of eccentric exercise-induced muscle damage

The purpose of this study was to examine the effects of combined β-hydroxy-β-methylbutyrate (HMB) and whey protein ingestion on muscle strength and damage following a single bout of eccentric exercise.

Authors: Minayuki Shirato, Yosuke Tsuchiya, Teruyuki Sato, Saki Hamano, Takeshi Gushiken, Naoto Kimura and Eisuke Ochi

Oral L-citrulline supplementation enhances cycling time trial performance in healthy trained men: Double-blind randomized placebo-controlled 2-way crossover study

Many human studies report that nitric oxide (NO) improves sport performance. This is because NO is a potential modulator of blood flow, muscle energy metabolism, and mitochondrial respiration during exercise. ...

Authors: Takashi Suzuki, Masahiko Morita, Yoshinori Kobayashi and Ayako Kamimura

Acknowledgement of manuscript reviewers 2015

The editors of Journal of the International Society of Sports Nutrition would like to thank all our reviewers who have contributed to the journal from Volume 12 (2015).

Authors: Jose Antonio, Douglas Kalman and Richard Kreider

Reliability and day-to-day variability of peak fat oxidation during treadmill ergometry

Exercising at intensities where fat oxidation rates are high has been shown to induce metabolic benefits in recreational and health-oriented sportsmen. The exercise intensity (Fat_peak) eliciting peak fat oxidatio...

Authors: Raul De Souza Silveira, Anja Carlsohn, Georg Langen, Frank Mayer and Friederike Scharhag-Rosenberger

The effects of a high protein diet on indices of health and body composition – a crossover trial in resistance-trained men

Eight weeks of a high protein diet (>3 g/kg/day) coupled with a periodized heavy resistance training program has been shown to positively affect body composition with no deleterious effects on health. Using a ...

Authors: Jose Antonio, Anya Ellerbroek, Tobin Silver, Leonel Vargas and Corey Peacock

Safety of TeaCrine®, a non-habituating, naturally-occurring purine alkaloid over eight weeks of continuous use

Theacrine (1,3,7,9-tetramethyluric acid) is a purine alkaloid found in certain coffee (Coffea) species, fruits (Cupuacu [Theobroma grandiflorum]), and tea (Camellia assamica, var. kucha) that has anti-inflamma...

Authors: Lem Taylor, Petey Mumford, Mike Roberts, Sara Hayward, Jacy Mullins, Stacie Urbina and Colin Wilborn

In a single-blind, matched group design: branched-chain amino acid supplementation and resistance training maintains lean body mass during a caloric restricted diet

Athletes and active adults many times have the goal of improving/maintaining fitness while losing weight and this is best achieved by caloric restriction in combination with exercise. However, this poses a ris...

Authors: Wesley David Dudgeon, Elizabeth Page Kelley and Timothy Paul Scheett

A nutrition and conditioning intervention for natural bodybuilding contest preparation: observations and suggestions

Bodybuilding is full of myths and practices that are contrary to the scientific literature, which can lead to health problems. Adopting a scientifically designed approach is very important, as it may help body...

Authors: Paulo Gentil

Evaluation of congruence among dietary supplement use and motivation for supplementation in young, Canadian athletes

Dietary supplement use is endemic in young athletes; however, it is unclear if their choices are congruent with their motivation for supplementation and the established benefits of the dietary supplements. The...

Authors: Jill A. Parnell, Kristin Wiens and Kelly Anne Erdman

The effects of whey protein with or without carbohydrates on resistance training adaptations

Nutrition intake in the context of a resistance training (RT) bout may affect body composition and muscle strength. However, the individual and combined effects of whey protein and carbohydrates on long-term r...

Authors: Juha J. Hulmi, Mia Laakso, Antti A. Mero, Keijo Häkkinen, Juha P. Ahtiainen and Heikki Peltonen

Dark chocolate supplementation reduces the oxygen cost of moderate intensity cycling

Dark chocolate (DC) is abundant in flavanols which have been reported to increase the bioavailability and bioactivity of nitric oxide (NO). Increasing NO bioavailability has often demonstrated reduced oxygen c...

Authors: Rishikesh Kankesh Patel, James Brouner and Owen Spendiff

Nutritional behaviour and beliefs of ski-mountaineers: a semi-quantitative and qualitative study

Endurance athletes are advised to optimize nutrition prior to races. Little is known about actual athletes’ beliefs, knowledge and nutritional behaviour. We monitored nutritional behaviour of amateur ski-mount...

Authors: Caroline Praz, Mélanie Granges, Céline Burtin and Bengt Kayser

Short-term creatine supplementation has no impact on upper-body anaerobic power in trained wrestlers

Creatine (CR) is considered an effective nutritional supplement having ergogenic effects, which appears more pronounced in upper-body compared to lower-body exercise. Nevertheless, results regarding the impact...

Authors: Martin Aedma, Saima Timpmann, Evelin Lätt and Vahur Ööpik

Acute effectiveness of a “fat-loss” product on substrate utilization, perception of hunger, mood state and rate of perceived exertion at rest and during exercise

Achieving fat-loss outcomes by ingesting multi-ingredient mixtures may be further enhanced during exercise. This study tested the acute thermogenic effectiveness of a commercially available multi-ingredient pr...

Authors: Ahmad Alkhatib, Marcos Seijo, Eneko Larumbe and Fernando Naclerio

Examining the effect of Withania somnifera supplementation on muscle strength and recovery: a randomized controlled trial

Withania somnifera (ashwagandha) is a prominent herb in Ayurveda. This study was conducted to examine the possible effects of ashwagandha root extract consumption on muscle mass and st...

Authors: Sachin Wankhede, Deepak Langade, Kedar Joshi, Shymal R. Sinha and Sauvik Bhattacharyya

The effect of 6 days of alpha glycerylphosphorylcholine on isometric strength

Ergogenic aides are widely used by fitness enthusiasts and athletes to increase performance. Alpha glycerylphosphorylcholine (A-GPC) has demonstrated some initial promise in changing explosive performance. The...

Authors: David Bellar, Nina R. LeBlanc and Brian Campbell

Effects of powdered Montmorency tart cherry supplementation on an acute bout of intense lower body strength exercise in resistance trained males

The purpose of this study was to examine whether short-term ingestion of a powdered tart cherry supplement prior to and following intense resistance-exercise attenuates muscle soreness and recovery strength lo...

Authors: Kyle Levers, Ryan Dalton, Elfego Galvan, Chelsea Goodenough, Abigail O’Connor, Sunday Simbo, Nicholas Barringer, Susanne U. Mertens-Talcott, Christopher Rasmussen, Mike Greenwood, Steven Riechman, Stephen Crouse and Richard B. Kreider

Safety of Teacrine^®, a Non-Habituating, Naturally-Occurring Purine Alkaloid Over Eight Weeks of Continuous Use

Authors: Sara Hayward, Jacy Mullins, Stacie Urbina, Emily Santos, Katelyn Villa, Nicole Viana, Shelbey Perkins, Jennifer Ander, Alyssa Olivencia, Shannon McGorty, Colin Wilborn and Lem Taylor

Effects of zeolite supplementation on parameters of intestinal barrier integrity, inflammation, redoxbiology and performance in aerobically trained subjects

Zeolites are crystalline compounds with microporous structures of Si-tetrahedrons. In the gut, these silicates could act as adsorbents, ion-exchangers, catalysts, detergents or anti-diarrheic agents. This stud...

Authors: Manfred Lamprecht, Simon Bogner, Kurt Steinbauer, Burkhard Schuetz, Joachim F. Greilberger, Bettina Leber, Bernhard Wagner, Erwin Zinser, Thomas Petek, Sandra Wallner-Liebmann, Tanja Oberwinkler, Norbert Bachl and Gert Schippinger

A high protein diet (3.4 g/kg/d) combined with a heavy resistance training program improves body composition in healthy trained men and women – a follow-up investigation

The consumption of a high protein diet (>4 g/kg/d) in trained men and women who did not alter their exercise program has been previously shown to have no significant effect on body composition. Thus, the purpo...

Authors: Jose Antonio, Anya Ellerbroek, Tobin Silver, Steve Orris, Max Scheiner, Adriana Gonzalez and Corey A Peacock

Iron and the female athlete: a review of dietary treatment methods for improving iron status and exercise performance

Iron is a functional component of oxygen transport and energy production in humans and therefore is a critically important micronutrient for sport and exercise performance. Athletes, particularly female athlet...

Authors: Ieva Alaunyte, Valentina Stojceska and Andrew Plunkett

The effect of an acute ingestion of Turkish coffee on reaction time and time trial performance

The purpose of this study was to examine the ergogenic benefits of Turkish coffee consumed an hour before exercise. In addition, metabolic, cardiovascular, and subjective measures of energy, focus and alertnes...

Authors: David D. Church, Jay R. Hoffman, Michael B. LaMonica, Joshua J. Riffe, Mattan W. Hoffman, Kayla M. Baker, Alyssa N. Varanoske, Adam J. Wells, David H. Fukuda and Jeffrey R. Stout

Differential effects of rapid or slow body weight loss on muscle weight and protein degradation pathways in rat skeletal muscle

Authors: Yudai Nonaka and Shin Terada

The effects of pomegranate extract on anaerobic exercise performance & cardiovascular responses

Authors: Erica J Roelofs, Katie R Hirsch, Eric T Trexler, Meredith G Mock and Abbie E Smith-Ryan

A randomized, double-blind, placebo controlled, parallel group, efficacy study of alpha BRAIN^® administered orally

Authors: Todd M Solomon, Jarrett Leech, Cynthia Murphy, Guy DeBros, Andrew Budson and Paul Solomon

Oral L-citrulline supplementation enhances cycling time trial performance in healthy well-trained males

Authors: Takashi Suzuki, Masahiko Morita, Yoshinori Kobayashi and Ayako Kamimura

MSM enhances LPS-induced inflammatory response after exercise

Authors: Simone Godwin, Richard J Bloomer, Marie van der Merwe and Rod Benjamin

Safety and organ health with 8 weeks use of commercially available bio-active peptide supplement: A prospective, double-blind, placebo controlled randomized trial

Authors: Patrick L Jacobs

The effects of a sports nutrition education intervention on nutritional status, sport nutrition knowledge, body composition, and performance in NCAA Division I baseball players

Authors: Jason M Cholewa, Andrew Landreth, Stacy Beam, Taylor Jones and Christopher J MacDonald

Effectiveness of multi-ingredient supplement on substrate utilisation, perception of hunger, mood state and rate of perceived exertion (RPE) at rest and during exercise

Authors: Marcos Seijo, Eneko Larumbe, Ahmad Alkhatib and Fernando Naclerio

The effects of alpha-glycerylphosphorylcholine, caffeine or placebo on markers of mood, cognitive function, power, speed, and agility

Authors: Adam G Parker, Allyn Byars, Martin Purpura and Ralf Jäger

Effects of macronutrient intake on fuel utilization: potential sex differences

Authors: Meredith G Mock, Katie R Hirsch, Erica J Roelofs, Eric T Trexler and Abbie E Smith-Ryan

Intermittent fasting combined with resistance training: effects on body composition, muscular performance, and dietary intake

Authors: Grant M Tinsley, Natalie K Butler, Jeffrey S Forsse, Annie A Bane, Grant B Morgan, Paul S Hwang, Peter W Grandjean and Paul M La Bounty

The effects of heavy resistance training and a high protein diet (3.4g/kg/d) on body composition, exercise performance and indices of health in resistance-trained individuals - a follow-up investigation

Authors: Anya Ellerbroek, Corey A Peacock, Steve Orris, Max Scheiner, Adriana Gonzalez, Tobin Silver and Jose Antonio

Functional animal proteins activate mTOR and bind pro-inflammatory compounds

Authors: Christopher J Detzel, Michael Q Fleming, Christopher D Warner, Abigail L Henderson and Eric M Weaver

Nutrient timing habits of Division I NCAA athletes

Authors: M G Nystrom, AR Jagim, M Greenwood, J M Oliver and MT Jones

Effects of sub-chronic branched chain amino acid supplementation on markers of muscle damage and performance variables following 1 week of rigorous weight training

Authors: Petey Mumford, Wesley C Kephart, Anna E McCloskey, Angelia M Holland, Joshua J Shake, C Brooks Mobley, Kaelin C Young, Jordan R Moon and Michael D Roberts

The effects of a bodybuilding thermogenic supplement in conjunction with a periodized resistance training program in resistance trained males

Authors: Bill Campbell, Danielle Aguilar, Ryan Colquhoun, Chris Gai, Nic Martinez, Danny Bove, Martin Szauer, Brett Harris, Michael Dumala, Stephen Beaugrand and Kathryn Raines

Ketogenic versus Western and standard chow diets favorably alters fat deposition and serum biomarkers in rats

Authors: Angelia M Holland, Wesley C Kephart, Ryan P Lowery, Petey W Mumford, C Brooks Mobley, Anna E McCloskey, Joshua J Shake, Paulo Mesquita, Jeffrey S Martin, Andreas N Kavazis, Danielle J McCullough, Michael D Roberts and Jacob M Wilson

Effects of 28 days of two creatine nitrate based dietary supplements on bench press power in recreationally active males

Authors: E Galvan, A O'Connor, Y C Goodenough, R Dalton, K Levers, N Barringer, M Cho, P Jung, M Greenwoord, C Rasmussen, PS Murano, C P Earnest and R Kreider

Safety and efficacy of a proprietary thermogenic and cutting agent on measures of muscular strength and endurance, body composition, fat metabolism, and hormone levels

Authors: Jacy Mullins, Jordan Outlaw, Stacie Urbina, Sara Hayward, Josh Holt, Bailey Burks, Alena Regelski, Eliza Fallice, Matt Stone, Colin Wilborn and Lem Taylor

The effects of beef protein isolate and whey protein isolate supplementation on lean mass and strength in resistance trained individuals - a double blind, placebo controlled study

Authors: Matthew Sharp, Kevin Shields, Ryan Lowery, Jason Lane, Jeremy Partl, Chase Holmer, Julie Minevich, Eduardo De Souza and Jacob Wilson

Effects of MSM on exercise-induced muscle and joint pain: a pilot study

Authors: Eric D Withee, Kimberly M Tippens, Regina Dehen and Douglas Hanes

Exercise and calorie information on menus is not enough to improve food choices in Hispanic adults

Authors: Brooke Bouza, Jessica Fellow, Maxine Lorenz, Lauren Rutledge, Manall Jaffery, Beverley Adams-Huet, Lyn Dart, Phil Esposito and Meena Shah

Effects of a traditionally-dosed creatine supplementation protocol and resistance training on the skeletal muscle uptake and whole-body metabolism and retention of creatine in males

Authors: Joshua J Gann, Sarah K McKinley-Barnard, Thomas L Andre, Ryan D Schoch and Darryn S Willoughby

The effect of three different energy drinks on oxygen consumption and perceived exertion during treadmill exercise

Authors: Gabriel J Sanders, Willard Peveler, Brady Holmer and Corey A Peacock