keyword
MENU ▼
Read by QxMD icon Read
search

Ergogenic

keyword
https://www.readbyqxmd.com/read/28912874/dietary-vitamin-b6-modulates-the-gene-expression-of-myokines-nrf2-related-factors-myogenin-and-hsp60-in-the-skeletal-muscle-of-rats
#1
Sofya Suidasari, Shinji Uragami, Noriyuki Yanaka, Norihisa Kato
Previous studies have suggested that vitamin B6 is an ergogenic factor. However, the role of dietary vitamin B6 in skeletal muscle has not been widely researched. The aim of the present study was to investigate the effects of dietary vitamin B6 on the gene expression of 19 myokines, 14 nuclear factor erythroid 2-related factor 2 (Nrf2)-regulated factors, 8 myogenesis-related factors and 4 heat shock proteins (HSPs), which may serve important roles in skeletal muscles. Rats were fed a diet containing 1 (marginal vitamin B6 deficiency), 7 (recommended dietary level) or 35 mg/kg of pyridoxine (PN) HCl/ for 6 weeks...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28890521/effect-of-burdock-extract-on-physical-performance-and-physiological-fatigue-in-mice
#2
Wen-Chyuan Chen, Yi-Ju Hsu, Mon-Chien Lee, Hua Shuai Li, Chun-Sheng Ho, Chi-Chang Huang, Fu-An Chen
Burdock (BD) is a common vegetable with many pharmacological properties. However, few studies have examined the effect of BD on exercise performance and physical fatigue. We aimed to evaluate the potential beneficial effects of BD on fatigue and ergogenic functions following physical challenge in mice. METHODS: Male ICR mice were divided into four groups to receive either vehicle, or BD at 348.5, 697 or 1,742.5 mg/kg/day, by daily oral gavage for 4 weeks. Exercise performance and fatigue were evaluated from forelimb grip strength, exhaustive swimming time, and post-exercise levels of physical fatigue-related biomarkers serum lactate, ammonia, glucose, and creatine kinase (CK)...
September 11, 2017: Journal of Veterinary Medical Science
https://www.readbyqxmd.com/read/28878590/enzymatically-modified-isoquercitrin-supplementation-intensifies-plantaris-muscle-fiber-hypertrophy-in-functionally-overloaded-mice
#3
Akiko Kohara, Masanao Machida, Yuko Setoguchi, Ryouichi Ito, Masanori Sugitani, Hiroko Maruki-Uchida, Hiroyuki Inagaki, Tatsuhiko Ito, Naomi Omi, Tohru Takemasa
BACKGROUND: Enzymatically modified isoquercitrin (EMIQ) is produced from rutin using enzymatic hydrolysis followed by treatment with glycosyltransferase in the presence of dextrin to add glucose residues. EMIQ is absorbed in the same way as quercetin, a powerful antioxidant reported to prevent disused muscle atrophy by targeting mitochondria and to have ergogenic effects. The present study investigated the effect of EMIQ on skeletal muscle hypertrophy induced by functional overload. METHODS: In Study 1, 6-week-old ICR male mice were divided into 4 groups: sham-operated control, sham-operated EMIQ, overload-operated control, and overload-operated EMIQ groups...
2017: Journal of the International Society of Sports Nutrition
https://www.readbyqxmd.com/read/28872376/caffeine-and-physiological-responses-to-submaximal-exercise-a-meta-analysis
#4
Mark Glaister, Conor Gissane
The aim of this study was to carry out a systematic review and meta-analysis of the effects of caffeine supplementation on physiological responses to submaximal exercise. 26 studies met the inclusion criteria of adopting double-blind, randomised, crossover designs that included a sustained (5 - 30 minutes) fixed-intensity bout of submaximal exercise (constrained to 60 - 85% V̇O2max) using a standard caffeine dose of 3 - 6 mg∙kg(-1) administered 30 - 90 minutes prior to exercise. Meta-analyses were completed using a random-effects model, and data are presented as raw mean difference (D) with associated 95% confidence limits (CL95)...
September 5, 2017: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/28857147/safety-and-ergogenic-properties-of-combined-aminophylline-and-ambrisentan-in-hypoxia
#5
Thies Schroeder, Claude A Piantadosi, Michael J Natoli, Julie Autmizguine, Michael Cohen-Wolkowieczs, Karyn L Hamilton, Christopher Bell, Jelena Klawitter, Uwe Christians, David C Irwin, Robert J Noveck
We hypothesized that concomitant pharmacological inhibition of the endothelin and adenosine pathway is safe and improves exercise performance in hypoxic humans, via a mechanism that does not involve augmentation of blood oxygenation. To test this hypothesis, we established safety and drug interactions for aminophylline (500mg) plus ambrisentan (5mg) in normoxic volunteers. Subsequently, a placebo-controlled study was employed to test the combination in healthy resting and exercising volunteers at simulated altitude (4,267m)...
August 31, 2017: Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28853006/are-the-current-guidelines-on-caffeine-use-in-sport-optimal-for-everyone-inter-individual-variation-in-caffeine-ergogenicity-and-a-move-towards-personalised-sports-nutrition
#6
Craig Pickering, John Kiely
Caffeine use is widespread in sport, with a strong evidence base demonstrating its ergogenic effect. Based on existing research, current guidelines recommend ingestion of 3-9 mg/kg approximately 60 min prior to exercise. However, the magnitude of performance enhancement following caffeine ingestion differs substantially between individuals, with the spectrum of responses ranging between highly ergogenic to ergolytic. These extensive inter-individual response distinctions are mediated by variation in individual genotype, environmental factors, and the legacy of prior experiences partially mediated via epigenetic mechanisms...
August 29, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28832370/dietary-nitrate-as-modulator-of-physical-performance-and-cardiovascular-health
#7
Conor P Kerley
PURPOSE OF REVIEW: Early interventional trials reported improvements in cardiac and exercise outcomes with inorganic nitrate ingestion. The current review aims to provide a brief update of recent evidence regarding ergogenic and cardiovascular effects of dietary nitrate and practical recommendations. RECENT FINDINGS: Recent evidence has been inconsistent and questions remain regarding effective dose, duration, and source of nitrate and cohorts likely to benefit...
August 19, 2017: Current Opinion in Clinical Nutrition and Metabolic Care
https://www.readbyqxmd.com/read/28829368/an-acute-dose-of-specific-grape-and-apple-polyphenols-improves-endurance-performance-a-randomized-crossover-double-blind-versus-placebo-controlled-study
#8
Gaëlle Deley, Damien Guillemet, François-André Allaert, Nicolas Babault
Polyphenols are thought to be an interesting ergogenic aid for exercise and recovery. However, most studies regarding the effects of polyphenols investigated several days of supplementations. The present work aimed to study the effects of an acute intake of grape and apple polyphenols on the capacity to maintain intense exercise, here named endurance performance. Forty-eight physically active men (31 ± 6 years) were included in this study. During the two testing sessions, volunteers completed an endurance test at a high percentage of their maximal aerobic power and time to exhaustion was measured...
August 22, 2017: Nutrients
https://www.readbyqxmd.com/read/28797049/effect-of-sodium-bicarbonate-on-prolonged-running-performance-a-randomized-double-blind-cross-over-study
#9
Tanja Freis, Anne Hecksteden, Ulf Such, Tim Meyer
BACKGROUND: The ability to sustain intense exercise seems to be partially limited by the body's capability to counteract decreases in both intra- and extracellular pH. While the influence of an enhanced buffering capacity via sodium bicarbonate (BICA) on short-term, high-intensity exercise performance has been repeatedly investigated, studies on prolonged endurance performances are comparatively rare, especially for running. The aim of the following study was to assess the ergogenic effects of an oral BICA substitution upon exhaustive intensive endurance running performance...
2017: PloS One
https://www.readbyqxmd.com/read/28791650/nicotine-sporting-friend-or-foe-a-review-of-athlete-use-performance-consequences-and-other-considerations
#10
REVIEW
Toby Mündel
Nicotine use amongst athletes is high and increasing, especially in team sports. This narrative review examines the rationale behind its use and evidence of its effect on physical performance, and considers important factors that should determine future research efforts. To date, ten studies have assessed muscular strength and power, sub- or maximal endurance and high-intensity exercise when nicotine (medication) or smokeless tobacco was used as an intervention. Two studies observed an ergogenic effect, one an ergolytic with the remaining seven reporting no change...
August 8, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28782695/analgesics-and-sport-performance-beyond-the-pain-modulating-effects
#11
REVIEW
Darias Holgado, James Hopker, Daniel Sanabria, Mikel Zabala
Analgesics are used widely in sport to treat pain and inflammation associated with injury. However, there is growing evidence that some athletes might be taking these substances in an attempt to enhance performance. Although the pharmacologic action of analgesics and their use in treating pain with and without anti-inflammatory effect is well established, their effect on sport performance is debated. The aim of this review was to evaluate the evidence of whether analgesics are capable of enhancing exercise performance and, if so, to what extent...
August 4, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28777672/the-physiological-and-ergogenic-effects-of-khat-catha-edulis-forsk-extract
#12
Mowaffaq Awad Sallam, Kamaludin Ahmed Sheikh, Ronald Baxendale, Mohammad Nurul Azam, Anwar M Hossain, Maged El-Setouhy
BACKGROUND: Khat (Catha edulis Forsk) is a natural psychoactive substance which contains two main addictive substances; Cathine and Cathinone. Khat is widely used in east Africa and southern Arabian Peninsula. Khat chewers believe that it improves work capacity and increases energy level and alertness. That is why we aimed in this study to investigate the physiological and ergogenic effects of khat extract. METHODS: This study is an experimental study conducted at the Substance Abuse Research Centre in Jazan University, Saudi Arabia...
August 4, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28777246/the-effects-of-jaw-clenching-and-jaw-alignment-mouthpiece-use-on-force-production-during-vertical-jump-and-isometric-clean-pull
#13
Charles R Allen, Yang-Chieh Fu, Vanessa Cazas-Moreno, Melinda W Valliant, Jacob R Gdovin, Charles C Williams, John C Garner
This study examined the effects of jaw clenching, and a self-adapted, jaw repositioning mouthpiece on force production during maximum countermovement vertical jump and maximum isometric mid-thigh clean pull assessments in an attempt to determine any ergogenic effects attributable to clenching, jaw repositioning mouthpiece use, or the combination of both. Thirty-six male subjects performed vertical jump and isometric clean pull assessments from a force platform under various mouthpiece and clench conditions...
July 31, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28771064/vitamin-d3-supplementation-does-not-improve-sprint-performance-in-professional-rugby-players-a-randomised-placebo-controlled-double-blind-intervention-study
#14
Kirsty A Fairbairn, Ingrid Jm Ceelen, C Murray Skeaff, Claire M Cameron, Tracy L Perry
Vitamin D insufficiency is common in athletes and may lower physical performance. Many cross-sectional studies associate vitamin D status with physical performance in athletes, however there have been few prospective randomised controlled trials with adequate statistical power to test this relationship, and none in the southern hemisphere. Thus, a prospective double blind, randomised placebo-controlled intervention trial was conducted, involving 57 professional rugby union players in New Zealand. Participants were randomised to receive 50,000 IU of cholecalciferol (equivalent to 3,570 IU/day) or placebo once every two weeks over 11-12 weeks...
August 3, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28767469/marijuana-and-its-effects-on-athletic-performance-a-systematic-review
#15
Kien V Trinh, Dion Diep, Hannah Robson
OBJECTIVE: To determine the effects of marijuana on athletic performance. DESIGN: We searched MEDLINE, EMBASE, CINAHL, PsycINFO, AMED, and SPORTDiscus from their beginning to September 2016. Study quality was assessed using the Cochrane collaboration tool for assessing risk of bias and the Cochrane GRADE scale. No meta-analyses were performed for this review. SETTING: Subjects in a track, gym, or recreational ward. PARTICIPANTS: Any primary study which included male and female adults of any athletic background between ages 18 and 65, with no other comorbid conditions...
July 27, 2017: Clinical Journal of Sport Medicine: Official Journal of the Canadian Academy of Sport Medicine
https://www.readbyqxmd.com/read/28748371/acute-effects-of-heated-resistance-exercise-in-female-and-male-power-athletes
#16
Julia R Casadio, Adam G Storey, Fabrice Merien, Andrew E Kilding, James D Cotter, Paul B Laursen
PURPOSE: To determine the effects of heated resistance exercise on thermal strain, neuromuscular function and hormonal responses in power athletes. METHODS: Sixteen (n = 8 female; 8 male) highly trained power athletes completed a combined strength and power resistance exercise session in hot (HOT ~30 °C) and temperate (CON ~20 °C) conditions. Human growth hormone (hGH), cortisol and testosterone concentrations in plasma, peak power (counter-movement jump, CMJ) and peak force (isometric mid-thigh pull) were measured before and after each training session; thermoregulatory responses were monitored during training...
July 26, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28745470/effects-of-taurine-on-markers-of-muscle-damage-inflammatory-response-and-physical-performance-in-triathletes
#17
Bryan S Martinez Galan, Flavia Giolo de Carvalho, Priscila Carvalho Santos, Ronaldo Bucken Gobbi, Carlos Kalva-Filho, Marcelo Papoti, Adelino Sanchez Silva, Ellen C Freitas
BACKGROUND: The practice of prolonged exercise with high intensity, as seen in triathlon training, can cause physiological imbalances that might result in muscle fatigue, muscle damage and changes in systemic inflammatory response, thus reduce the athletes physical performance, therefore, both adequate total caloric and macronutrient intake also the use of a specific ergogenic aid, as taurine supplementation would be an alternative to prevent inflammation and muscle damage. In order to verify the effects of 8 weeks of taurine and chocolate milk supplementation, markers of muscle damage, inflammation, and aerobic capacity were quantified in triathletes...
July 25, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28741186/effects-of-caffeine-supplementation-on-performance-in-ball-games
#18
REVIEW
Jingyi Shannon Chia, Laura Ann Barrett, Jia Yi Chow, Stephen Francis Burns
Although a large body of evidence exists documenting the ergogenic properties of caffeine, most studies have focused on endurance performance. However, findings from endurance sports cannot be generalized to performance in ball games where, apart from having a high level of endurance, successful athletic performances require a combination of physiological, technical and cognitive capabilities. The purpose of this review was to critically evaluate studies that have examined the effect of a single dose of caffeine in isolation on one or more of the following performance measures: total distance, sprint performance, agility, vertical jump performance and accuracy in ball games...
July 24, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28728801/-muscle-dysmorphia-and-use-of-ergogenics-substances-a-systematic-review
#19
Jaime García-Rodríguez, Georgina Alvarez-Rayón, Jaime Camacho-Ruíz, Adriana Amaya-Hernández, Juan Manuel Mancilla-Díaz
The use of ergogenic substances (UES) is not restricted to achieving a better athletic performance, but also it is a behavior for body changing through muscle development; however, little is known about the relationship between muscle dysmorphia (MD) and UES. Therefore, it was conducted a systematic review of those empirical papers that have studied this relationship over the last decade (2004-2014). First it is highlighted that of the 22 articles analyzed, only 13 explicitly aimed this interest. Besides, although the documented data outlined some relevant aspects such as the existence of a high co-occurrence (60-90%) between MD and UES...
July 2017: Revista Colombiana de Psiquiatría
https://www.readbyqxmd.com/read/28720715/ischemic-preconditioning-does-not-alter-muscle-sympathetic-responses-to-static-handgrip-and-metaboreflex-activation-in-young-healthy-men
#20
Anthony V Incognito, Connor J Doherty, Jordan B Lee, Matthew J Burns, Philip J Millar
Ischemic preconditioning (IPC) has been hypothesized to elicit ergogenic effects by reducing feedback from metabolically sensitive group III/IV muscle afferents during exercise. If so, reflex efferent neural outflow should be attenuated. We investigated the effects of IPC on muscle sympathetic nerve activity (MSNA) during static handgrip (SHG) and used post-exercise circulatory occlusion (PECO) to isolate for the muscle metaboreflex. Thirty-seven healthy men (age: 24 ± 5 years [mean ± SD]) were randomized to receive sham (n = 16) or IPC (n = 21) interventions...
July 2017: Physiological Reports
keyword
keyword
44795
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"