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Peripheral fatigue

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https://www.readbyqxmd.com/read/27918667/neuromuscular-fatigue-aetiology-after-repeated-sprints-depends-on-exercise-modality
#1
Katja Tomazin, Jean-Benoit Morin, Guillaume Y Millet
PURPOSE: The aim of the study was to compare neuromuscular fatigue induced by repeated sprint running vs cycling. METHODS: Eleven active male participants performed two repeated maximal sprint protocol (5×6 s, 24-s rest periods, 4 sets, 3-min between sets), one in running (treadmill) and one in cycling (cycle ergometer). Neuromuscular function, evaluated before (PRE), 30 s after the first (S1), the second (S2), and the last set (LAST), and 5 min after the last set (POST5), consisted in determining knee extensors maximal voluntary torque (MVC), voluntary activation (VA), single twitch (Tw), high- (Db100) and low- (Db10) frequency torque, and maximal muscle compound action potential (M-wave) amplitude and duration of vastus lateralis...
December 5, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27901246/chemotherapy-for-advanced-non-small-cell-lung-cancer-in-the-elderly-population
#2
Fábio Nasser Santos, Tiago Biachi de Castria, Marcelo Rocha Souza Cruz, Rachel Riera
BACKGROUND: Approximately 50% of patients with newly diagnosed non-small cell lung cancer (NSCLC) are over 70 years of age at diagnosis. Despite this fact, these patients are underrepresented in randomized controlled trials (RCTs). As a consequence, the most appropriate regimens for these patients are controversial, and the role of single-agent or combination therapy is unclear. In this setting, a critical systematic review of RCTs in this group of patients is warranted. OBJECTIVES: To assess the effectiveness and safety of different cytotoxic chemotherapy regimens for previously untreated elderly patients with advanced (stage IIIB and IV) NSCLC...
September 2016: São Paulo Medical Journal, Revista Paulista de Medicina
https://www.readbyqxmd.com/read/27900149/video-analysis-of-concussion-injury-mechanism-in-under-18-rugby
#3
Sharief Hendricks, Sam O'Connor, Michael Lambert, James C Brown, Nicholas Burger, Sarah Mc Fie, Clint Readhead, Wayne Viljoen
BACKGROUND: Understanding the mechanism of injury is necessary for the development of effective injury prevention strategies. Video analysis of injuries provides valuable information on the playing situation and athlete-movement patterns, which can be used to formulate these strategies. Therefore, we conducted a video analysis of the mechanism of concussion injury in junior-level rugby union and compared it with a representative and matched non-injury sample. METHODS: Injury reports for 18 concussion events were collected from the 2011 to 2013 under-18 Craven Week tournaments...
2016: BMJ Open Sport & Exercise Medicine
https://www.readbyqxmd.com/read/27886020/cranial-electrotherapy-stimulation-affects-mood-state-but-not-levels-of-peripheral-neurotrophic-factors-or-hypothalamic-pituitary-adrenal-axis-regulation
#4
Hee-Tae Roh, Wi-Young So
Cranial electrotherapy stimulation (CES) is reported to aid in relieving symptoms of depression and anxiety, though the mechanism underlying this effect remains unclear. Therefore, the present study aimed to evaluate changes in the hypothalamic-pituitary-adrenal (HPA) axis response and levels of neurotrophic factors, as well as changes in mood state, in patients undergoing CES therapy. Fifty healthy postmenopausal women were randomly assigned to either a Sham CES group (n = 25) or an Active CES group (n = 25)...
November 18, 2016: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/27882113/peripheral-neuropathy-outcomes-and-efficacy-of-subcutaneous-bortezomib-when-combined-with-thalidomide-and-dexamethasone-in-the-treatment-of-multiple-myeloma
#5
Hong Liu, Ruirong Xu, Hongming Huang
Due to the safety, convenience and efficacy of subcutaneous administration of bortezomib (scBor), it is becoming increasingly common to treat multiple myeloma (MM) using this treatment method. The current retrospective study suggested a lower incidence of peripheral neuropathy (PN) outcomes and superior efficacy following treatment with scBor combined with thalidomide and dexamethasone (VTD) in MM when compared with intravenous Bor (ivBor) treatment. The data of 81 patients from the Affiliated Hospital of Nantong University between September 2011 and February 2014 were analyzed, including 37 scBor and 44 ivBor patients administered a median (range) of 5...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27864638/effects-of-caffeine-on-neuromuscular-fatigue-and-performance-during-high-intensity-cycling%C3%A2-exercise-in-moderate-hypoxia
#6
Bruno P C Smirmaul, Antonio Carlos de Moraes, Luca Angius, Samuele M Marcora
PURPOSE: To investigate the effects of caffeine on performance, neuromuscular fatigue and perception of effort during high-intensity cycling exercise in moderate hypoxia. METHODS: Seven adult male participants firstly underwent an incremental exercise test on a cycle ergometer in conditions of acute normobaric hypoxia (fraction inspired oxygen = 0.15) to establish peak power output (PPO). In the following two visits, they performed a time to exhaustion test (78 ± 3% PPO) in the same hypoxic conditions after caffeine ingestion (4 mg kg(-1)) and one after placebo ingestion in a double-blind, randomized, counterbalanced cross-over design...
November 18, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27860259/resp%C3%A4-ratory-muscle-strength-%C3%A4-n-pat%C3%A4-ents-w%C3%A4-th-pulmonary-hypertens%C3%A4-on-the-relat%C3%A4-onsh%C3%A4-p-w%C3%A4-th-exerc%C3%A4-se-capac%C3%A4-ty-phys%C3%A4-cal-act%C3%A4-v%C3%A4-ty-level-and-qual%C3%A4-ty-of-l%C3%A4-fe
#7
Goksen Kuran Aslan, Buket Akıncı, Ipek Yeldan, Gulfer Okumus
INTRODUCTION: Pulmonary hypertension (PH) is characterized by exertional dyspnea, fatigue, chest pain, dizziness, and syncope. Physical activity, peripheral and respiratory muscle strength reduces in pateints with PH. Little is known about respiratory muscle weakness and related outcomes. OBJECTIVES: The aims of the study were to determine respiratory muscle strength and to investigate the relationship between respiratory muscle strength and spirometric measurements, exercise capacity, physical activity level, quality of life, and pulmonary hemodynamics in patients with PH...
November 17, 2016: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/27858153/changes-in-the-electromechanical-delay-components-during-a-fatiguing-stimulation-in-human-skeletal-muscle-an-emg-mmg-and-force-combined-approach
#8
Emiliano Cè, Susanna Rampichini, Elena Monti, Massimo Venturelli, Eloisa Limonta, Fabio Esposito
PURPOSE: Peripheral fatigue involves electrochemical and mechanical mechanisms. An electromyographic, mechanomyographic and force combined approach may permit a kinetic evaluation of the changes at the synaptic, skeletal muscle fiber, and muscle-tendon unit level during a fatiguing stimulation. METHODS: Surface electromyogram, mechanomyogram, force and stimulation current were detected from the gastrocnemius medialis muscle in twenty male participants during a fatiguing stimulation (twelve blocks of 35 Hz stimulations, duty cycle 9 s on/1 s off, duration 120 s)...
November 17, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27857275/the-interdisciplinary-rehabilitation-care-team-and-the-role-of-physical-therapy-in-survivor-exercise
#9
Margaret L McNeely, Naomi Dolgoy, Mona Onazi, Kirsten Suderman
BACKGROUND: Rehabilitation professionals offer expertise in functional assessment, treatment of impairments and functional limitations, and disability prevention. To optimize recovery, and often prior to participating in community-based exercise programming, survivors may need rehabilitation services from a range of healthcare professionals, including physiatrists, nurses, nutritionists, psychologists, and speech, occupational, and physical therapists. OBJECTIVES: Survivors with physical impairments and functional limitations may benefit from interdisciplinary rehabilitation and physical therapy, including tailored therapeutic exercise interventions...
December 1, 2016: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/27848221/mechanical-properties-of-high-entropy-alloy-al0-1cocrfeni-for-peripheral-vascular-stent-application
#10
Karthik Alagarsamy, Aleksandra Fortier, Mageshwari Komarasamy, Nilesh Kumar, Atif Mohammad, Subhash Banerjee, Hai-Chao Han, Rajiv S Mishra
High entropy alloys (HEAs) are new class of metallic materials with five or more principal alloying elements. Due to this distinct concept of alloying, the HEAs exhibit unique properties compared to conventional alloys. The outstanding properties of HEAs include increased strength, superior wear resistance, high temperature stability, increased fatigue properties, good corrosion, and oxidation resistance. Such characteristics of HEAs have generated significant interest among the scientific community. However, their applications are yet to be explored...
December 2016: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/27830093/strengthened-corticosubcortical-functional-connectivity-during-muscle-fatigue
#11
Zhiguo Jiang, Xiao-Feng Wang, Guang H Yue
The present study examined functional connectivity (FC) between functional MRI (fMRI) signals of the primary motor cortex (M1) and each of the three subcortical neural structures, cerebellum (CB), basal ganglia (BG), and thalamus (TL), during muscle fatigue using the quantile regression technique. Understanding activation relation between the subcortical structures and the M1 during prolonged motor performance should help delineate how central motor control network modulates acute perturbations at peripheral sensorimotor system such as muscle fatigue...
2016: Neural Plasticity
https://www.readbyqxmd.com/read/27825551/repeated-sprint-ability-but-not-neuromuscular-fatigue-is-dependent-on-short-versus-long-duration-recovery-time-between-sprints-in-healthy-males
#12
Michael R Monks, Chris T Compton, Joseph D Yetman, Kevin E Power, Duane C Button
OBJECTIVES: During maximal intensity leg cycling sprints, previous research has shown that central and peripheral fatigue development occurs with various (<30s) short-duration recovery periods between sprints. The aim of the current study was to compare the development of neuromuscular fatigue during maximal intensity lower-body sprints interspersed with short and longer duration recovery periods. DESIGN: Crossover study. METHODS: Ten participants completed 10, 10s sprints interspersed with either 30 or 180s of recovery...
October 27, 2016: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/27825464/prognostic-factors-and-indications-for-treatment-of-waldenstr%C3%A3-m-s-macroglobulinemia
#13
REVIEW
Robert A Kyle, Stephen M Ansell, Prashant Kapoor
Waldenström's Macroglobulinemia (WM) is characterized by the presence of an IgM monoclonal protein regardless of its size, 10% or more bone marrow infiltration by small lymphocytes with a plasmacytoid or plasma cell differentiation. These cells usually have the following markers: IgM+, CD5(-), CD10(-), CD19(+), CD20(+) and CD23(-). Chronic lymphocytic leukemia as well as other lymphoproliferative disorders such as mantle cell, marginal zone and mucosa-associated lymphoid tissue (MALT) lymphoma must be excluded...
June 2016: Best Practice & Research. Clinical Haematology
https://www.readbyqxmd.com/read/27821022/the-sensory-tolerance-limit-a-hypothetical-construct-determining-exercise-performance
#14
Thomas J Hureau, Lee M Romer, Markus Amann
Neuromuscular fatigue compromises exercise performance and is determined by central and peripheral mechanisms. Interactions between the two components of fatigue can occur via neural pathways, including feedback and feedforward processes. This brief review discusses the influence of feedback and feedforward mechanisms on exercise limitation. In terms of feedback mechanisms, particular attention is given to group III/IV sensory neurons which link limb muscle with the central nervous system. Central corollary discharge, a copy of the neural drive from the brain to the working muscles, provides a signal from the motor system to sensory systems and is considered a feedforward mechanism that might influence fatigue and consequently exercise performance...
November 7, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27812446/successful-hemostasis-and-resection-of-a-bleeding-gastric-polyp-by-endoscopic-banding-ligation-in-a-uremic-patient-taking-antiplatelet-agent
#15
Ping-I Hsu, Kwok-Hung Lai, Feng-Woei Tsay, Jin-Shiung Cheng, E-Ming Wang, Rong-Jer Lai, Tsair-Fwu Lee
The modalities to treat bleeding polyps include electrocautery snare polypectomy, adrenaline injection, clipping, argon plasma coagulation and surgery. We hereby describe an endoscopic banding ligation method for the management of bleeding gastric polyp in a patient receiving antiplatelet therapy. A 66-year-old man presented with a five month-history of intermittent tarry stool passage, nausea and fatigue. He had a past history of peripheral arterial occlusive disease and non-insulin dependent diabetes mellitus with end stage renal disease, and regularly took antiplatelet agent (ticlopidine 100 mg thrice daily) for cardiovascular prophylaxis...
2016: SpringerPlus
https://www.readbyqxmd.com/read/27806677/power-duration-relationship-physiology-fatigue-and-the-limits-of-human-performance
#16
Mark Burnley, Andrew M Jones
The duration that exercise can be maintained decreases as the power requirements increase. In this review, we describe the power-duration (PD) relationship across the full range of attainable power outputs in humans. We show that a remarkably small range of power outputs is sustainable (power outputs below the critical power, CP). We also show that the origin of neuromuscular fatigue differs considerably depending on the exercise intensity domain in which exercise is performed. In the moderate domain (below the lactate threshold, LT), fatigue develops slowly and is predominantly of central origin (residing in the central nervous system)...
November 3, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27793850/phase-i-study-of-safety-and-pharmacokinetics-of-the-anti-muc16-antibody-drug-conjugate-dmuc5754a-in-patients-with-platinum-resistant-ovarian-cancer-or-unresectable-pancreatic-cancer
#17
J F Liu, K N Moore, M J Birrer, S Berlin, U A Matulonis, J R Infante, B Wolpin, K A Poon, R Firestein, J Xu, R Kahn, Y Wang, K Wood, W C Darbonne, M R Lackner, S K Kelley, X Lu, Y J Choi, D Maslyar, E W Humke, H A Burris
BACKGROUND: MUC16 is a tumor-specific antigen overexpressed in ovarian (OC) and pancreatic (PC) cancers. The antibody-drug conjugate (ADC), DMUC5754A, contains the humanized anti-MUC16 monoclonal antibody conjugated to the microtubule-disrupting agent, monomethyl auristatin E (MMAE). PATIENTS AND METHODS: This phase I study evaluated safety, pharmacokinetics (PK), and pharmacodynamics of DMUC5754A given every 3 weeks (Q3W, 0.3-3.2 mg/kg) or weekly (Q1W, 0.8-1.6 mg/kg) to patients with advanced recurrent platinum-resistant OC or unresectable PC...
November 2016: Annals of Oncology: Official Journal of the European Society for Medical Oncology
https://www.readbyqxmd.com/read/27787567/patient-s-quality-of-life-after-high-dose-radiation-therapy-for-thoracic-carcinomas-changes-over-time-and-influence-on-clinical-outcome
#18
Christina Schröder, Rita Engenhart-Cabillic, Hilke Vorwerk, Michael Schmidt, Winfried Huhnt, Eyck Blank, Dietrich Sidow, André Buchali
PURPOSE: Quality of life (QoL) is an important factor in patient care. This analysis is focused on QoL before and after radio(chemo)therapy in patients with thoracic carcinomas, as well as on its influence on clinical follow-up and survival, and the correlation with treatment-related toxicities. MATERIALS AND METHODS: The analysis included 81 patients with intrathoracic carcinoma receiving radio(chemo)therapy. For analysis of QoL, the European Organisation for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) and the lung cancer-specific supplement (EORTC QLQ-LC13) were used...
October 27, 2016: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/27784689/central-vs-peripheral-determinants-of-sympathetic-neural-recruitment-insights-from-static-handgrip-exercise-and-postexercise-circulatory-occlusion
#19
Mark B Badrov, T Dylan Olver, J Kevin Shoemaker
Sympathetic outflow is modified during acute homeostatic stress through increased firing of low-threshold axons, recruitment of latent axons, and synaptic delay modifications. However, the role of central mechanisms versus peripheral reflex control over sympathetic recruitment remains unknown. Here, we examined sympathetic discharge patterns during fatiguing static handgrip (SHG) exercise and postexercise circulatory occlusion (PECO) to study the central vs. peripheral reflex elements of sympathetic neural coding...
December 1, 2016: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/27784374/-effect-of-bd-regimen-combined-with-cyclophosphamide-and-pirarubicin-in-treatment-of-relapse-refractory-multiple-myeloma
#20
Yu-Fen Wang, Wen-Jun Xu, Yu-Li Chen, Xiao-Huan Ma, Zhi-Yuan Qiu, Cui-Ai Ren
OBJECTIVE: To compare the efficacy and safety of BD regimen combined with cyclophosphamide(CTX) and pirarubicin chemotherapy(P-CAD) for patients with relapse/refractory multiple myeloma(MM). METHODS: Twenty-eight cases of relapse/refractory MM were enrolled in a group of P-CAD regimen, 36 cases of relapse/retractory MM treated with BD were used as controls. The therapeutic efficacy and adverse reactions of 2 regimens for patients with relapse/retractory MM were compared and analyzed...
October 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
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