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https://www.readbyqxmd.com/read/29792821/exhaustive-exercise-induced-oxidative-stress-alteration-of-erythrocyte-oxygen-release-capacity
#1
Yanlian Xiong, Yanlei Xiong, Yueming Wang, Yajin Zhao, Yaojin Li, Yang Ren, Ruofeng Wang, Mingzi Zhao, Yitong Hao, Haibei Liu, Xiang Wang
The aim of the present study is to explore the effect of exhaustive running exercise (ERE) in the oxygen release capacity of rat erythrocytes. Rats were divided into sedentary control (C), moderate running exercise (MRE) and exhaustive running exercise groups. The thermodynamics and kinetics properties of the erythrocyte oxygen release process of different groups were tested. We also determined the degree of band-3 oxidative and phosphorylation, anion transport activity and carbonic anhydrase isoform II(CAII) activity...
May 24, 2018: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/29792553/mitochondrial-complex-i-defect-resulting-from-exercise-induced-lower-limb-ischemia-in-patients-with-peripheral-arterial-disease
#2
Isabelle Signolet, Pierre Abraham, Stéphanie Chupin, Myriam Ammi, Naïg Gueguen, Franck Letournel, Jean Picquet, Christophe Baufreton, Mickael Daligault, Vincent Procaccio, Pascal Reynier, Samir Henni
OBJECTIVE: This study aims to compare the structural and mitochondrial alterations between muscle segments affected by exercise-induced ischemia and segments of the same muscle without ischemia, in the same subject. METHODS: In a prospective analysis, 34 patients presenting either peripheral arterial disease or chronic coronary syndrome without any evidence of peripheral arterial disease were eligible for inclusion based on findings indicating a need for either a femoro-popliteal bypass or a saphenous harvesting for coronary bypass...
May 24, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29790207/the-repeated-bout-effect-can-occur-without-mechanical-and-neuromuscular-changes-after-a-bout-of-eccentric-exercise
#3
Patricio A Pincheira, Ben W Hoffman, Andrew G Cresswell, Timothy J Carroll, Nicholas A T Brown, Glen A Lichtwark
Changes in muscle fascicle mechanics have been postulated to underpin the repeated bout effect (RBE) observed following exercise-induced muscle damage (EIMD). However, in the medial gastrocnemius (MG), mixed evidence exists on whether fascicle stretch amplitude influences the level of EIMD, thus questioning whether changes in fascicle mechanics underpin the RBE. An alternative hypothesis is that neural adaptations contribute to the RBE in this muscle. The aim of this study was to investigate neuromechanical adaptations during and after repeated bouts of a highly controlled muscle lengthening exercise that aimed to maximise EIMD in MG...
May 23, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29789599/exercise-activates-the-pi3k-akt-signal-pathway-by-decreasing-the-expression-of-5%C3%AE-reductase-type-1-in-pcos-rats
#4
Chuyan Wu, Feng Jiang, Ke Wei, Zhongli Jiang
Hyperandrogenism and hyperinsulinemia are main clinical endocrine features of PCOS. Exercise can adjust the androgen level, as well as increase the sensitivity of insulin by activating PI3K-Akt insulin signaling pathways. 5αR1 has certain effects on insulin resistance and can synthesize dihydrotestosterone by metabolizing testosterone. So 5αR1 may be the target of androgen and insulin for exercise-induced regulation. To investigate the role of 5αR1 in the PI3K-Akt signaling pathway in skeletal muscle of PCOS rats activated by exercise, fifty-four female rats were randomly divided into the PCOS group (n = 42) and the control group(n = 12)...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29788440/exercise-induced-hypoalgesia-after-isometric-wall-squat-exercise-a-test-retest-reliabilty-study
#5
Henrik Bjarke Vaegter, Kristian Damgaard Lyng, Fredrik Wannebo Yttereng, Mads Holst Christensen, Mathias Brandhøj Sørensen, Thomas Graven-Nielsen
Background: Isometric exercises decrease pressure pain sensitivity in exercising and nonexercising muscles known as exercise-induced hypoalgesia (EIH). No studies have assessed the test-retest reliability of EIH after isometric exercise. This study investigated the EIH on pressure pain thresholds (PPTs) after an isometric wall squat exercise. The relative and absolute test-retest reliability of the PPT as a test stimulus and the EIH response in exercising and nonexercising muscles were calculated...
May 19, 2018: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29786927/the-exhaled-nitric-oxide-and-mannitol-test-to-predict-exercise-induced-bronchoconstriction
#6
Kyubo Kim, Hong Je Cho, Jung Won Yoon, Sun Hee Choi, Youn Ho Sheen, ManYong Han, Heysung Baek
BACKGROUND: Exercise-induced bronchoconstriction (EIB) is diagnosed via exercise challenge on a treadmill. However, such testing requires complex equipment and sufficient healthcare resources. The fraction of exhaled nitric oxide (FeNO) test and mannitol bronchial provocation test (BPT) may serve as a surrogate of exercise testing. METHODS: We compared the diagnostic utilities of the FeNO test and mannitol BPT in predicting EIB in asthmatic children. We retrospectively analysed data from 60 asthmatic children aged 6-16 years...
May 22, 2018: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/29780023/non-coding-rnas-and-exercise-pathophysiological-role-and-clinical-application-in-the-cardiovascular-system
#7
REVIEW
Clarissa P C Gomes, David de Gonzalo-Calvo, Rocio Toro, Tiago Fernandes, Daniel Theisen, Da-Zhi Wang, Yvan Devaux
There is overwhelming evidence that regular exercise training is protective against cardiovascular disease (CVD), the main cause of death worldwide. Despite the benefits of exercise, the intricacies of their underlying molecular mechanisms remain largely unknown. Non-coding RNAs (ncRNAs) have been recognized as a major regulatory network governing gene expression in several physiological processes and appeared as pivotal modulators in a myriad of cardiovascular processes under physiological and pathological conditions...
May 23, 2018: Clinical Science (1979-)
https://www.readbyqxmd.com/read/29777633/hypertrophic-effect-of-inhaled-beta-2-agonist-with-and-without-concurrent-exercise-training-a-randomized-controlled-trial
#8
Søren Jessen, Johan Onslev, Anders Lemminger, Vibeke Backer, Jens Bangsbo, Morten Hostrup
INTRODUCTION: Due to a high prevalence of asthma and exercise-induced bronchoconstriction in elite athletes, there is a high use of beta2 -adrenoceptor agonists (beta2 -agonists) in the athletic population. While anabolic in rodents, no study has been able to detect hypertrophy in humans after chronic beta2 -agonist inhalation. METHODS: We investigated if inhaled beta2 -agonist, terbutaline, alters body composition and metabolic rate with and without concurrent exercise training in healthy young men...
May 19, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29776987/mini-dose-glucagon-as-a-novel-approach-to-prevent-exercise-induced-hypoglycemia-in-type-1-diabetes
#9
Michael R Rickels, Stephanie N DuBose, Elena Toschi, Roy W Beck, Alandra S Verdejo, Howard Wolpert, Martin J Cummins, Brett Newswanger, Michael C Riddell
OBJECTIVE: Patients with type 1 diabetes who do aerobic exercise often experience a drop in blood glucose concentration that can result in hypoglycemia. Current approaches to prevent exercise-induced hypoglycemia include reduction in insulin dose or ingestion of carbohydrates, but these strategies may still result in hypoglycemia or hyperglycemia. We sought to determine whether mini-dose glucagon (MDG) given subcutaneously before exercise could prevent subsequent glucose lowering, and to compare the glycemic response to current approaches for mitigating exercise-associated hypoglycemia...
May 18, 2018: Diabetes Care
https://www.readbyqxmd.com/read/29775542/exercise-and-circulating-bdnf-mechanisms-of-release-and-implications-for-the-design-of-exercise-interventions
#10
Jeremy James Walsh, Michael E Tschakovsky
Engagement in regular bouts of exercise confers numerous positive effects on brain health across the lifespan. Acute bouts of exercise transiently improve cognitive function, while long-term exercise training stimulates brain plasticity, improves brain function, and helps to stave off neurological disease. The action of brain-derived neurotrophic factor (BDNF) is a candidate mechanism underlying these exercise-induced benefits and is the subject of considerable attention in the exercise-brain health literature...
May 18, 2018: Applied Physiology, Nutrition, and Metabolism, Physiologie Appliquée, Nutrition et Métabolisme
https://www.readbyqxmd.com/read/29773650/the-exercise-inducible-bile-acid-receptor-tgr5-improves-skeletal-muscle-function-in-mice
#11
Takashi Sasaki, Ayane Kuboyama, Moeko Mita, Shotaro Murata, Makoto Shimizu, Jun Inoue, Kazutoshi Mori, Ryuichiro Sato
TGR5 (also known as G protein-coupled bile acid receptor 1, GPBAR1) is a G protein-coupled bile acid receptor that is expressed in many diverse tissues. TGR5 is involved in various metabolic processes, including glucose metabolism and energy expenditure; however, TGR5's function in skeletal muscle is not fully understood. Using both gain- and loss-of-function mouse models, we demonstrate here that Tgr5 activation promotes muscle cell differentiation and muscle hypertrophy. Both young and old transgenic mice with muscle-specific Tgr5 expression exhibited increased muscle strength...
May 17, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29771692/the-expanding-spectrum-of-paroxysmal-movement-disorders-update-from-clinical-features-to-therapeutics
#12
Eavan M McGovern, Emmanuel Roze, Timothy J Counihan
PURPOSE OF REVIEW: This review will discuss the expanding clinical spectrum of paroxysmal movement disorders and therapeutic options in light of emerging genotypic heterogeneity in these conditions. RECENT FINDINGS: Paroxysmal movement disorders comprise a heterogeneous group of rare neurological conditions characterized by intermittent episodes of abnormal movement associated with various triggers. As the clinical and genotypic spectrum of these disorders evolves, so also has the range of therapeutic options...
May 15, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29769416/endogenous-systems-involved-in-exercise-induced-analgesia
#13
R Da Silva Santos, G Galdino
Exercise-induced analgesia is a phenomenon discussed worldwide. This effect began to be investigated in the early 1970s in healthy individuals and rodents during and after an acute or chronic session of running or swimming. Thereafter, studies found this effect was also induced by resistance exercises. Over the years, many studies have demonstrated the importance of exercise-induced analgesia in relieving pain caused by different conditions, such as fibromyalgia, low back pain, neuropathy, and osteoarthritis...
February 2018: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/29763678/acute-aerobic-exercise-induces-a-preferential-mobilisation-of-plasmacytoid-dendritic-cells-into-the-peripheral-blood-in-man
#14
Frankie F Brown, John P Campbell, Alex J Wadley, James P Fisher, Sarah Aldred, James E Turner
Dendritic cells (DCs) are important sentinel cells of the immune system responsible for presenting antigen to T cells. Exercise is known to cause an acute and transient increase in the frequency of DCs in the bloodstream in humans, yet there are contradictory findings in the literature regarding the phenotypic composition of DCs mobilised during exercise, which may have implications for immune regulation and health. Accordingly, we sought to investigate the composition of DC sub-populations mobilised in response to acute aerobic exercise...
May 12, 2018: Physiology & Behavior
https://www.readbyqxmd.com/read/29757826/physical-activity-levels-predict-exercise-induced-hypoalgesia-in-older-adults
#15
Thomas Ohlman, Leah Miller, Keith E Naugle, Kelly M Naugle
Prior research indicates that older adults exhibit a deficient capacity to activate multiple pain inhibitory mechanisms, including pain inhibition after acute exercise termed exercise-induced hypoalgesia (EIH). The influence of physical activity levels and psychological processes on EIH in older adults remains unclear. PURPOSE: This study examined potential psychological and physical activity predictors of the magnitude of EIH following submaximal isometric exercise in healthy older adult men and women...
May 4, 2018: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29757673/rapamycin-insensitive-mechanistic-target-of-rapamycin-regulates-basal-and-resistance-exercise-induced-muscle-protein-synthesis
#16
Riki Ogasawara, Takeshi Suginohara
We investigated whether rapamycin-insensitive mechanistic target of rapamycin (mTOR) signaling plays a role in regulating resistance exercise-induced muscle protein synthesis. We used a rodent model of resistance exercise and compared the effect of rapamycin, an allosteric mTOR inhibitor, with the effect of AZD8055, an ATP-competitive mTOR kinase inhibitor. The right gastrocnemius muscle of male Sprague-Dawley rats age 11 wk was contracted isometrically via percutaneous electrical stimulation (100 Hz, 5 sets of ten 3-s contractions, 7 s of rest between contractions, 3 min of rest between sets), and the left gastrocnemius muscle served as control...
May 14, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29757061/exercise-induced-laryngeal-obstruction-in-athletes-contributory-factors-and-treatment-implications
#17
Liv-Jorunn Kolnes, Trine Stensrud
Otherwise healthy adolescent athletes presenting with respiratory symptoms consistent with exercise-induced laryngeal obstruction (EILO) are frequently encountered in clinical practice. The symptoms are often incorrectly considered to result from exercise-induced asthma, and may be wrongly treated as such. Given the potential implications for health and performance if EILO is left untreated, a more comprehensive understanding of contributory mechanisms is essential in order to create appropriate treatment procedures...
May 14, 2018: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/29757056/whey-protein-augments-leucinemia-and-post-exercise-p70s6k1-activity-compared-to-a-hydrolysed-collagen-blend-when-in-recovery-from-training-with-low-carbohydrate-availability
#18
Samuel G Impey, Kelly M Hammond, Robert Naughton, Carl Langan-Evans, Sam O Shepherd, Adam P Sharples, Jessica Cegielski, Kenneth Smith, Stewart Jeromson, D Lee Hamilton, Graeme L Close, James P Morton
We examined the effects of whey versus collagen protein on skeletal muscle cell signalling responses associated with mitochondrial biogenesis and protein synthesis in recovery from an acute training session completed with low carbohydrate (CHO) availability. In a repeated measures design (after adhering to a 36-h exercise-dietary intervention to standardise pre-exercise muscle glycogen), eight males completed a 75-min non-exhaustive cycling protocol and consumed 22 g of a hydrolysed collagen blend (COLLAGEN) or whey (WHEY) protein 45 min prior to exercise, 22 g during exercise and 22 g immediately post-exercise...
May 14, 2018: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29751254/isometric-pre-conditioning-blunts-exercise-induced-muscle-damage-but-does-not-attenuate-changes-in-running-economy-following-downhill-running
#19
Leonardo C R Lima, Natália M Bassan, Adalgiso C Cardozo, Mauro Gonçalves, Camila C Greco, Benedito S Denadai
Running economy (RE) is impaired following unaccustomed eccentric-biased exercises that induce muscle damage. It is also known that muscle damage is reduced when maximal voluntary isometric contractions (MVIC) are performed at a long muscle length 2-4 days prior to maximal eccentric exercise with the same muscle, a phenomenon that can be described as isometric pre-conditioning (IPC). We tested the hypothesis that IPC could attenuate muscle damage and changes in RE following downhill running. Thirty untrained men were randomly assigned into experimental or control groups and ran downhill on a treadmill (-15%) for 30 min...
May 8, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29749052/exercise-testing-based-algorithms-to-diagnose-mcardle-disease-and-mad-defects
#20
J-B Noury, F Zagnoli, J-L Carré, I Drouillard, F Petit, C Le Maréchal, P Marcorelles, F Rannou
OBJECTIVE: As exercise intolerance and exercise-induced myalgia are commonly encountered in metabolic myopathies, functional screening tests are commonly used during the diagnostic work-up. Our objective was to evaluate the accuracy of isometric handgrip test (IHT) and progressive cycle ergometer test (PCET) to identify McArdle disease and myoadenylate deaminase (MAD) deficiency and to propose diagnostic algorithms using exercise-induced lactate and ammonia variations. METHODS: A prospective sample of 46 patients underwent an IHT and a PCET as part of their exercise-induced myalgia and intolerance evaluation...
May 10, 2018: Acta Neurologica Scandinavica
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