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

abstract：OBJECTIVE:To examine the effects of resistance training on hematological and selected indices of iron status in 17 women aged 54-71 years and 18 men aged 56-69 years. DESIGN:Tests and evaluations were done before and after all subjects participated in a resistance-training program twice weekly for 12 weeks. RESULTS:T...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Murray-Kolb LE,Beard JL,Joseph LJ,Davey SL,Evans WJ,Campbell WW

更新日期：2001-09-01 00:00:00

abstract：:Tonic vagal modulation of cardiac period (R-R interval) decreases with advancing age, but is greater in middle-aged and older adults who habitually perform aerobic exercise compared with their sedentary peers. Cardiovagal baroreflex sensitivity also declines markedly with age in sedentary adults but only 50% as much i...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Seals DR,Monahan KD,Bell C,Tanaka H,Jones PP

更新日期：2001-12-01 00:00:00

abstract：:Whenever athletes willfully or accidentally ingest performance-enhancing drugs or other banned substances (such as drugs of abuse), markers of those drugs can be detected in biological samples (e.g., biofluids: urine, saliva, blood); in the case of some drugs, that evidence can be apparent for many weeks following the...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Cadwallader AB,Murray B

更新日期：2015-08-01 00:00:00

abstract：:Fluid milk consumed in conjunction with resistance training (RT) provides additional protein and calcium, which may enhance the effect of RT on body composition. However, the literature on this topic is inconsistent with limited data in adolescents. Therefore, we examined the effects of a supervised RT program (6 mo, ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Lambourne K,Washburn RA,Lee J,Betts JL,Thomas DT,Smith BK,Gibson CA,Sullivan DK,Donnelly JE

更新日期：2013-08-01 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：:The aim of this study was to conduct a systematic review of the effects of probiotic supplementation on physically active individuals. The participants, interventions, comparisons, outcome and study design inclusion criteria were (a) studies involving healthy adults or older subjects of both sexes who did physical exe...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Möller GB,da Cunha Goulart MJV,Nicoletto BB,Alves FD,Schneider CD

更新日期：2019-09-01 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：:Assessment of physical activity in clinical bone studies is essential. Two bone-specific physical activity scoring methods, the Bone Loading History Questionnaire (BLHQ) and Bone-Specific Physical Activity Questionnaire (BPAQ), have shown correlations with bone density and geometry, but not architecture. The purpose o...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Kindler JM,Ross HL,Laing EM,Modlesky CM,Pollock NK,Baile CA,Lewis RD

更新日期：2015-04-01 00:00:00

abstract：:This study aimed to assess the diet quality of Brazilian Paralympic track-and-field team sprinters and its variation between days. All sprinters (n = 28) were invited, and 20 (13 men and seven women) accepted the invitation consisting of 13 athletes with visual impairment, four with cerebral palsy, and three with limb...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Joaquim DP,Juzwiak CR,Winckler C

更新日期：2019-06-05 00:00:00

abstract：:The authors tested the hypothesis that perception of carbohydrate (CHO) availability augments exercise capacity in conditions of reduced CHO availability. Nine males completed a sleep-low train model comprising evening glycogen-depleting cycling followed by an exhaustive cycling protocol the next morning in the fasted...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Waterworth SP,Spencer CC,Porter AL,Morton JP

更新日期：2020-02-04 00:00:00

abstract：:The purpose of this study was to measure the recovery kinetics of pH and lactate for the conditions of pre-exercise acidosis, alkalosis, and placebo states. Twelve trained male cyclists completed 3 exercise trials (110% workload at VO2max), ingesting either 0.3 g/kg of NH4Cl (ACD), 0.2 g/kg of Na+HCO3- and 0.2 g/kg of...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Robergs R,Hutchinson K,Hendee S,Madden S,Siegler J

更新日期：2005-02-01 00:00:00

abstract：:We previously reported that insulin resistance in skeletal muscle of obese individuals was associated with decreases in insulin signal transduction and tyrosine kinase activity of the insulin receptor. Herein is reviewed the recently published data supporting the hypothesis that protein kinase C (PKC) phosphorylates t...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Dohm GL

更新日期：2001-12-01 00:00:00

abstract：PURPOSE:To examine relationships between changes in body weight, body composition, and fitness level in male students of the general population and those in the Army Reserve Officer Training Corps (ROTC) program during the freshman year of college. METHODS:Thirty-seven (18.4 ± 0.7 yr) healthy, nonsmoking, first-semest...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Crombie AP,Liu PY,Ormsbee MJ,Ilich JZ

更新日期：2012-12-01 00:00:00

abstract：:Recent studies have shown that neutrophils can utilize glutamine and that glutamine supplementation can improve neutrophil function in postoperative and burn patients. The present study investigated the influence of oral glutamine supplementation on stimulated neutrophil degranulation and oxidative burst activity foll...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Walsh NP,Blannin AK,Bishop NC,Robson PJ,Gleeson M

更新日期：2000-03-01 00:00:00

abstract：:Rugby union athletes have divergent body composition based on the demands of their on-field playing position and ethnicity. With an established association between physique traits and positional requirements, body composition assessment is routinely undertaken. Surface anthropometry and dual-energy X-ray absorptiometr...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Zemski AJ,Keating SE,Broad EM,Slater GJ

更新日期：2018-09-26 00:00:00

abstract：:Obesity and increased arterial stiffness are independent risk factors for cardiovascular disease. Arterial stiffness is increased in obese individuals than in age-matched nonobese individuals. We demonstrated that dietary modification and exercise training are effective in reducing arterial stiffness in obese persons....

journal_title：International journal of sport nutrition and exercise metabolism

authors： Maeda S,Zempo-Miyaki A,Sasai H,Tsujimoto T,So R,Tanaka K

更新日期：2015-02-01 00:00:00

abstract：:Eight healthy subjects, aged 39.0 ¿ 2.4 years, consumed four 6% carbohydrate-electrolyte solutions containing either one (glucose or fructose) or two transportable carbohydrates in single (glucose + fructose) or bound (sucrose) forms. Solution osmolalities ranged from 250 to 434 mOsm/kg H2O. The test solutions were in...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Shi X,Bartoli W,Horn M,Murray R

更新日期：2000-12-01 00:00:00

abstract：:To defend against hydrogen cation accumulation and muscle fatigue during exercise, sodium bicarbonate (NaHCO3) ingestion is commonplace. The individualized dose-response relationship between NaHCO3 ingestion and blood biochemistry is unclear. The present study investigated the bicarbonate, pH, base excess and sodium r...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Jones RL,Stellingwerff T,Artioli GG,Saunders B,Cooper S,Sale C

更新日期：2016-10-01 00:00:00

abstract：:The timing of carbohydrate ingestion and how this influences net muscle glycogen utilization and fatigue has only been investigated in prolonged cycling. Past findings may not translate to running because each exercise mode is distinct both in the metabolic response to carbohydrate ingestion and in the practicalities ...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Menzies C,Wood M,Thomas J,Hengist A,Walhin JP,Jones R,Tsintzas K,Gonzalez JT,Betts JA

更新日期：2020-02-28 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：:High-intensity intermittent exercise (HIIE) such as the 30-s Wingate test attenuates postprandial triacylglycerol (TG), however, the ability of shorter versions of HIIE to reduce postprandial TG is undetermined. Thus, the effect of 8-s sprinting bouts of HIIE on blood TG levels of 12 females after consumption of a hig...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Tan M,Chan Moy Fat R,Boutcher YN,Boutcher SH

更新日期：2014-02-01 00:00:00

abstract：:Twelve healthy active subjects (6 male, 6 female) performed 60 min of exercise (60% VO(2max)) on 3 occasions after supplementing with L-Carnitine L-tartrate (LCLT) or placebo. Each subject received a chronic dose, an acute dose, and placebo in a randomized, double-blind crossover design. Dietary intake and exercise we...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Abramowicz WN,Galloway SD

更新日期：2005-08-01 00:00:00

abstract：BACKGROUND:Functional hypothalamic amenorrhea is common among female athletes and may be difficult to treat. Restoration of menses (ROM) is crucial to prevent deleterious effects to skeletal and reproductive health. OBJECTIVES:To determine the natural history of menstrual disturbances in female college athletes manage...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Arends JC,Cheung MY,Barrack MT,Nattiv A

更新日期：2012-04-01 00:00:00

abstract：PURPOSE:This study investigated the effect of bovine colostrum (BC) on mucosal defense in the respiratory tracts of athletes and a nonexercising control group. METHODS:An athlete cohort (ATH) of 25 (12 male, 13 female) elite swimmers (age 14-23 yr) and a control cohort (CON) of 28 (9M, 19F) students (age 18-27 yr) wer...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Crooks C,Cross ML,Wall C,Ali A

更新日期：2010-06-01 00:00:00

abstract：PURPOSE:The impact of mild hypohydration on physiological responses and cognitive performance following exercise-heat stress (EHS) were examined compared with conditions when fluids were ingested ad libitum (AL) or replaced to match sweat losses (FR). METHODS:Twelve unacclimatized, recreationally-active men (22.2 ± 2....

journal_title：International journal of sport nutrition and exercise metabolism

authors： Wittbrodt MT,Millard-Stafford M,Sherman RA,Cheatham CC

更新日期：2015-10-01 00:00:00

abstract：:Unaccustomed eccentric exercise using large muscle groups elicits soreness, decrements in physical function and impairs markers of whole-body insulin sensitivity; although these effects are attenuated with a repeated exposure. Eccentric exercise of a small muscle group (elbow flexors) displays similar soreness and dam...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Gonzalez JT,Barwood MJ,Goodall S,Thomas K,Howatson G

更新日期：2015-08-01 00:00:00

abstract：:Food intolerance is becoming increasingly prevalent, and increasing numbers of athletes have celiac disease. This poses challenges as dietary recommendations for exercise are largely based on gluten-containing carbohydrate-rich foods. The K4 cycle race covers 384 km around the Coromandel Peninsula, New Zealand. Lack o...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Black KE,Skidmore P,Brown RC

更新日期：2012-08-01 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：:Acute resistance exercise and L-arginine have both been shown to independently elevate plasma growth hormone (GH) concentrations; however, their combined effect is controversial. The purpose was to investigate the combined effects of resistance exercise and L-arginine supplementation on plasma L-arginine, GH, GH secre...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Forbes SC,Harber V,Bell GJ

更新日期：2014-04-01 00:00:00

abstract：:Food-based diet indices provide a practical, rapid, and inexpensive way of evaluating dietary intake. Rather than nutrients, diet indices assess the intake of whole foods and dietary patterns, and compare these with nutrition guidelines. An athlete-specific diet index would offer an efficient and practical way to asse...

journal_title：International journal of sport nutrition and exercise metabolism

authors： Capling L,Gifford JA,Beck KL,Flood VM,Slater GJ,Denyer GS,O'Connor HT

更新日期：2019-10-17 00:00:00