Rapid Weight Loss Elicits Harmful Biochemical and Hormonal Responses in Mixed Martial Arts Athletes.

abstract：:Prior to presentation, two physically fit adults, a 39-year-old male and 40-year-old female, began supplementation with an over-the-counter thyroid preparation marketed as a metabolic accelerator and fat loss aid, tiratricol. Both participants took the supplement for 5 weeks (3000-4000 mcg/d) and 3 weeks (6000 mcg/d),...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Scally MC,Hodge A

更新日期：2003-03-01 00:00:00

abstract：:This double-blinded, placebo controlled, randomized crossover trial investigated the influence of 2-week mixed flavonoid versus placebo supplementation on oxinflammation markers after a 75-km cycling time trial in 22 cyclists (42.3 ± 1.7 years). Blood samples were collected before and after the 2-week supplementation,...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Nieman DC,Valacchi G,Wentz LM,Ferrara F,Pecorelli A,Woodby B,Sakaguchi CA,Simonson A

更新日期：2019-11-21 00:00:00

abstract：:Dietary protein intake should be optimized in all athletes to ensure proper recovery and enhance the skeletal muscle adaptive response to exercise training. In addition to total protein intake, the use of specific proteincontaining food sources and the distribution of protein throughout the day are relevant for optimi...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Gillen JB,Trommelen J,Wardenaar FC,Brinkmans NY,Versteegen JJ,Jonvik KL,Kapp C,de Vries J,van den Borne JJ,Gibala MJ,van Loon LJ

更新日期：2017-04-01 00:00:00

abstract：PURPOSE:The purpose of this study was to investigate the effect of acute and 4-week Rhodiola rosea intake on physical capacity, muscle strength, speed of limb movement, reaction time, and attention. METHODS: PHASE I:A double blind placebo-controlled randomized study (n= 24) was performed, consisting of 2 sessions (2 ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： De Bock K,Eijnde BO,Ramaekers M,Hespel P

更新日期：2004-06-01 00:00:00

abstract：:The present study investigated the effect of the glycemic index of an evening meal on responses to a standard high glycemic index (HGI) breakfast the following morning. The metabolic responses to exercise 3 h after breakfast were also investigated. Seven active males completed 2 trials. In each trial, participants wer...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Stevenson E,Williams C,Nute M,Swaile P,Tsui M

更新日期：2005-06-01 00:00:00

abstract：BACKGROUND:Time spent in sedentary activities (such as watching television) has previously been associated with several risk factors for cardiovascular disease (CVD) such as increased low-density lipoprotein cholesterol (LDL-C). Little is known about associations with lipoprotein subfractions. Using television and comp...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Frazier-Wood AC,Borecki IB,Feitosa MF,Hopkins PN,Smith CE,Arnett DK

更新日期：2014-02-01 00:00:00

abstract：:The purpose of this study was to determine the nutritional status, eating behaviors, and body composition of 20 jockeys working in the New Zealand Racing Industry. Seven-day weighed food records showed the mean daily energy intake for male and female jockeys was 6769 +/- 1339 kJ and 6213 +/- 1797 kJ, respectively. Ene...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Leydon MA,Wall C

更新日期：2002-06-01 00:00:00

abstract：:Special operation forces participating in mountain warfare/cold weather (MWCW) training have higher energy demands, but adequate fueling is difficult to achieve. The purpose of the study was to determine energy expenditure relative to energy intake and examine fueling patterns during 3 days of MWCW training in Naval S...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Beals K,Perlsweig KA,Haubenstriker JE,Lovalekar M,Beck CP,Yount DL,Darnell ME,Allison K,Nindl BC

更新日期：2019-05-01 00:00:00

abstract：:In a randomized, placebo-controlled, double-blind crossover design, 15 trained males undertook exercise trials during two 4 wk supplementation periods, with either 3 g L-Carnitine L-tartrate (LCLT) or 3 g placebo (P) daily. Total carbohydrate and fat oxidation during 90 min steady state cycling were not different betw...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Broad EM,Maughan RJ,Galloway SD

更新日期：2005-12-01 00:00:00

abstract：:The term Relative Energy Deficiency in Sport was introduced by the International Olympic Committee in 2014. It refers to the potential health and performance consequences of inadequate energy for sport, emphasizing that there are consequences of low energy availability (EA; typically defined as <30 kcal·kg-1 fat-free ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Elliott-Sale KJ,Tenforde AS,Parziale AL,Holtzman B,Ackerman KE

更新日期：2018-07-01 00:00:00

abstract：:Previous research indicates that ultramarathon exercise can result in blood oxidative stress. The purpose of this investigation was to examine the efficacy of oral supplementation with quercetin, a naturally occurring compound with known antioxidant properties, as a potential countermeasure against blood oxidative str...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Quindry JC,McAnulty SR,Hudson MB,Hosick P,Dumke C,McAnulty LS,Henson D,Morrow JD,Nieman D

更新日期：2008-12-01 00:00:00

abstract：:Both caffeine (CAF) and pseudoephedrine (PSE) are proposed to be central nervous system stimulants. However, during competition, CAF is a permitted substance, whereas PSE is a banned substance at urinary levels >150 μg · ml(-1). As a result, this study aimed to compare the effect of CAF versus PSE use on cycling time ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Spence AL,Sim M,Landers G,Peeling P

更新日期：2013-10-01 00:00:00

abstract：INTRODUCTION:Supplementation with beta-alanine may have positive effects on severe-intensity, intermittent, and isometric strength-endurance performance. These could be advantageous for competitive alpine skiers, whose races last 45 to 150 s, require metabolic power above the aerobic maximum, and involve isometric musc...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Gross M,Bieri K,Hoppeler H,Norman B,Vogt M

更新日期：2014-12-01 00:00:00

abstract：:Combat sport athletes typically engage in a process called making weight, characterized by rapid weight loss (RWL) and subsequent rapid weight gain (RWG) in the days preceding competition. These practices differ across each sport, but no systematic comparison of the size of the changes in body mass exists. The aim was...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Matthews JJ,Stanhope EN,Godwin MS,Holmes MEJ,Artioli GG

更新日期：2019-07-01 00:00:00

abstract：:Endurance athletes commonly ingest caffeine as a means to enhance training intensity and competitive performance. A widely-used source of caffeine is coffee, however conflicting evidence exists regarding the efficacy of coffee in improving endurance performance. In this context, the aims of this evidence-based review ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Higgins S,Straight CR,Lewis RD

更新日期：2016-06-01 00:00:00

abstract：:The purpose of this study was to examine the effect of high-intensity physical activity during training on the biochemical status of thiamin and riboflavin in athletes. Thiamin and riboflavin concentrations in whole blood of a group of 19 athletes (6 men and 13 women) were measured during a low-intensity preparatory p...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Sato A,Shimoyama Y,Ishikawa T,Murayama N

更新日期：2011-06-01 00:00:00

abstract：:Discrepancies in energy and macronutrient intakes between tests are apparent even when a solid prepackaged diet (Sdiet) is used to standardize dietary intake for preexperimental trials. It is unknown whether a liquid prepackaged diet (Ldiet) leads to improved adherence, resulting in lower variability in energy and mac...

journal_title：International journal of sport nutrition and exercise metabolism

authors： El-Chab A,Simpson C,Lightowler H

更新日期：2019-09-01 00:00:00

abstract：:The aim of this study was to analyze the effects of 8 weeks of conjugated linoleic acid (CLA) supplementation associated with aerobic exercise on body fat and lipid profile on obese women. We performed a randomized, double-blinded and placebo-controlled trial with 28 obese women who received 3.2 g/day of CLA or 4 g/da...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Ribeiro AS,Pina FL,Dodero SR,Silva DR,Schoenfeld BJ,Sugihara Júnior P,Fernandes RR,Barbosa DS,Cyrino ES,Tirapegui J

更新日期：2016-04-01 00:00:00

abstract：:Little data exists on drinking behavior, sweat loss, and exercise intensity across a competitive handball tournament in elite female athletes. Heart rate (HR), fluid balance and sweat electrolyte content were assessed on 17 international players across a 6-day tournament involving 5 games and 2 training sessions playe...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Cunniffe B,Fallan C,Yau A,Evans GH,Cardinale M

更新日期：2015-02-01 00:00:00

abstract：:Dual-energy X-ray absorptiometry is a commonly used clinical assessment tool for body composition and bone mineral density, which is gaining popularity in athletic cohorts. Results from body composition scans are useful for athletic populations to track training and nutritional interventions, while bone mineral densit...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Persson C,Shiel F,Climstein M,Furness J

更新日期：2019-07-01 00:00:00

abstract：:Omega-3 fatty acid (n-3 FA) supplementation could promote adaptation to soccer-specific training. We examined the impact of a 4-week period of n-3 FA supplementation during training on adaptations in 1RM knee extensor strength, 20-m sprint speed, vertical jump power, and anaerobic endurance capacity (Yo-Yo test) in co...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Gravina L,Brown FF,Alexander L,Dick J,Bell G,Witard OC,Galloway SDR

更新日期：2017-08-01 00:00:00

abstract：:Heavy exercise is associated with an increased risk of upper respiratory tract infections. Strenuous exercise also causes gastrointestinal (GI) symptoms. In previous studies probiotics have reduced respiratory tract infections and GI symptoms in general populations including children, adults, and the elderly. These qu...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Kekkonen RA,Vasankari TJ,Vuorimaa T,Haahtela T,Julkunen I,Korpela R

更新日期：2007-08-01 00:00:00

abstract：:We investigated the effects of vitamin D3 supplementation on physical performance during winter training in vitamin D insufficient taekwondo athletes. Thirty-five collegiate male and female taekwondo athletes, aged 19-22 years with low serum 25(OH)D concentration (28.8 ± 1.10 nmol/L), were randomly assigned to a vitam...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Jung HC,Seo MW,Lee S,Jung SW,Song JK

更新日期：2018-11-01 00:00:00

abstract：:We investigated the effects of calcium supplementation and physical practice on the bone ultrasound properties and trabecular microarchitecture in children. 160 children aged 8-11 were randomly allocated to active or nonactive groups and to receive either a calcium-phosphate or a placebo powder for 6 months. Skeletal ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Ianc D,Serbescu C,Bembea M,Benhamou L,Lespessailles E,Courteix D

更新日期：2006-12-01 00:00:00

abstract：:The purpose of this study was to assess the influence of rehydration with a caffeinated beverage during nonexercise periods on hydration status throughout consecutive practices in the heat. Ten (7 women, 3 men) partially heat- acclimated athletes (age 24 +/-1y, body fat 19.2 +/- 2 %, weight 68.4 +/- 4.0 kg, height 170...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Fiala KA,Casa DJ,Roti MW

更新日期：2004-08-01 00:00:00

abstract：:This article describes the development, analysis, and implementation of the menu available to athletes and patrons in the main dining hall of the Athletes Village at the Sydney 2000 Olympic Games and the significant role of sports dietitians in this process. Menu design and development was informed by focus groups, li...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Pelly F,O'Connor H,Denyer G,Caterson I

更新日期：2009-08-01 00:00:00

abstract：:The aim of the study was to evaluate the effectiveness of an intervention program that combined nutrition education and prevention of disordered eating in a group of female professional dance students. Thirty-two dancers, aged 19-25 years, took part in the program. Evaluation was done by a series of questionnaires tha...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Yannakoulia M,Sitara M,Matalas AL

更新日期：2002-03-01 00:00:00

abstract：:Vanadium compounds have been shown to have insulin-like properties in rats and non-insulin-dependent diabetic humans. The purpose of the present study was to examine whether the effects of acute and short-term administration of vanadyl sulfate (VA) on insulin sensitivity also exist in healthy active individuals. Five ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Jentjens RL,Jeukendrup AE

更新日期：2002-12-01 00:00:00

abstract：:Loss of muscle mass, strength, and oxidative capacity accompanies normal aging in humans. The mechanisms responsible for these changes remain to be clearly defined. Muscle protein mass and function depend on protein turnover. Synthesis rate of the major muscle contractile protein, myosin heavy chain (MHC), and transcr...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Short KR,Nair KS

更新日期：2001-12-01 00:00:00

abstract：:Alpha-lipoic acid has been found to enhance glucose uptake into skeletal muscle in animal models. Studies have also found that the co-ingestion of carbohydrate along with creatine increases muscle creatine uptake by a process related to insulin-stimulated glucose disposal. The purpose of this study was to determine th...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Burke DG,Chilibeck PD,Parise G,Tarnopolsky MA,Candow DG

更新日期：2003-09-01 00:00:00