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Muscular fatigue

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https://www.readbyqxmd.com/read/28049525/nutrition-therapy-with-high-intensity-interval-training-to-improve-prostate-cancer-related-fatigue-in-men-on-androgen-deprivation-therapy-a-study-protocol
#1
Brenton J Baguley, Tina L Skinner, Michael D Leveritt, Olivia R L Wright
BACKGROUND: Cancer-related fatigue is one of the most prevalent, prolonged and distressing side effects of prostate cancer treatment with androgen deprivation therapy. Preliminary evidence suggests natural therapies such as nutrition therapy and structured exercise prescription can reduce symptoms of cancer-related fatigue. Men appear to change their habitual dietary patterns after prostate cancer diagnosis, yet prostate-specific dietary guidelines provide limited support for managing adverse side effects of treatment...
January 3, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28044282/are-prepubertal-children-metabolically-comparable-to-well-trained-adult-endurance-athletes
#2
REVIEW
Sébastien Ratel, Anthony J Blazevich
It is well acknowledged that prepubertal children have smaller body dimensions and a poorer mechanical (movement) efficiency, and thus a lower work capacity than adults. However, the scientific evidence indicates that prepubertal children have a greater net contribution of energy derived from aerobic metabolism in exercising muscle and reduced susceptibility to muscular fatigue, which makes them metabolically comparable to well-trained adult endurance athletes. For example, the relative energy contribution from oxidative and non-oxidative (i...
January 2, 2017: Sports Medicine
https://www.readbyqxmd.com/read/28032564/wearing-lead-aprons-in-surgical-operating-rooms-ergonomic-injuries-evidenced-by-infrared-thermography
#3
Dominique Alexandre, Marc Prieto, Fabien Beaumont, Redha Taiar, Guillaume Polidori
BACKGROUND: The purpose of this study is to quantify the impact of the weight of radiation protection lead aprons on the discomfort and the fatigue of the medical staff within an operating room of interventional gastroenterology. To quantify this fatigue, we analyzed variations of the physiological parameters, including heart rate, blood pressure, and cutaneous temperature; we compared two situations: the first within the classic endoscopy department (without apron) and the second within the operating room with apron...
November 2, 2016: Journal of Surgical Research
https://www.readbyqxmd.com/read/28003034/resistance-training-program-for-fatigue-management-in-the-workplace-exercise-protocol-in-a-cluster-randomized-controlled-trial
#4
Hélio Gustavo Santos, Luciana Dias Chiavegato, Daniela Pereira Valentim, Patricia Rodrigues da Silva, Rosimeire Simprini Padula
BACKGROUND: Fatigue is a multifactorial condition that leads to disease and loss in production, and it affects a large number of workers worldwide. This study aims to demonstrate a resistance exercise protocol that individuals will perform during the work schedule, and to evaluate the effectiveness of this exercises program for fatigue control. METHODS/DESIGN: This is a cluster randomized controlled trial with two arms and is assessor blinded. A total of 352 workers of both sexes, aged 18-65 years, from a medium-sized dairy plant were enrolled in this study...
December 22, 2016: BMC Public Health
https://www.readbyqxmd.com/read/28002978/electromyographic-analysis-of-relevant-muscle-groups-during-completion-of-computer-tasks-using-different-computer-mouse-positions
#5
Shunji Sako, Hiromichi Sugiura, Hironori Tanoue, Makoto Kojima, Mitsunobu Kono, Ryoichi Inaba
Background We analyzed muscular activity for different computer mouse positions during the completion of a timed computer task and determined whether the different mouse positions could affect muscular activity, productivity, and perceived fatigue. Methods The subjects were nine healthy young men. Two mouse positions were studied: the distal position (DP), with the forearm rested on the desk, and the proximal position (PP) with only the wrist rested on the desk. The subjects performed a 16-min task in each position...
December 22, 2016: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/27993585/resilience-and-function-in-adults-with-physical-disabilities-an-observational-study
#6
Samuel L Battalio, Arielle M Silverman, Dawn M Ehde, Dagmar Amtmann, Karlyn A Edwards, Mark P Jensen
OBJECTIVE: To determine if resilience is uniquely associated with functional outcomes (satisfaction with social roles, physical functioning, and quality of life) in individuals with physical disabilities, after controlling for measures of psychological health (depression and anxiety) and symptom severity (pain, fatigue, sleep disturbance). We also examined the potential moderating effect of gender, age, and diagnosis on the hypothesized associations between resilience and function. DESIGN: Cross-sectional survey study...
December 16, 2016: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/27990227/effects-of-a-pre-workout-energy-drink-supplement-on-upper-body-muscular-endurance-performance
#7
Mitchel A Magrini, Ryan J Colquhoun, J Jay Dawes, Doug B Smith
The use of pre-workout beverages is becoming an increasingly common method of improving performance during exercise in athletic and recreationally active populations. Therefore, the purpose of this study was to investigate the effects of a commercially available energy drink on exercise performance. Thirty-one healthy males (n=23) and females (n=8) participated in this study and were separated into two groups: supplement (SU; n=16) or placebo (PL; n=15). Subjects visited the laboratory on 2 occasions separated by no more than 7 days...
2016: International Journal of Exercise Science
https://www.readbyqxmd.com/read/27984499/effects-of-pre-exhaustion-on-the-patterns-of-muscular-activity-in-the-flat-bench-press
#8
Gołaś Artur, Maszczyk Adam, Pietraszewski Przemyslaw, Petr Stastny, Tufano James, Zając Adam
Pre-exhaustion (PE) has been applied in resistance training to manipulate the order of performing two resistance exercises, a single joint exercise to momentary exhaustion, followed by a multi-joint movement which includes the same muscle group. This method ensures greater recruitment of muscles or muscle groups in the multi-joint exercise to further increase muscle strength and overcome strength plateaus. The purpose of the present study was to investigate muscle activity by electromyography during high-intensity (95% of 1 repetition maximum) bench press (BP), before and after PE of the pectoralis major (PM), anterior deltoid (AD) and triceps brachii (TB) muscles in order to determine the effects of PE of the prime movers...
November 29, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27956540/effective-translation-of-research-to-practice-hospital-based-rehabilitation-program-improves-health-related-physical-fitness-and-quality-of-life-of-cancer-survivors
#9
Amy A Kirkham, Riggs J Klika, Tara Ballard, Paul Downey, Kristin L Campbell
BACKGROUND: Although exercise has been widely established as an efficacious rehabilitative therapy for cancer survivors in rigorously designed research studies, demonstration of translation of this research into clinical oncology practice is needed. The purpose of this study was to evaluate the effectiveness of a real-world cancer rehabilitation program implemented within a healthcare setting. PATIENTS AND METHODS: This study involved 299 adult cancer survivors enrolled in a hospital-based, supervised, individualized, cancer rehabilitation program...
December 2016: Journal of the National Comprehensive Cancer Network: JNCCN
https://www.readbyqxmd.com/read/27942152/the-temporal-relationship-of-thresholds-between-muscle-activity-and-ventilation-during-bicycle-ramp-exercise-in-community-dwelling-elderly-males
#10
Kentaro Sasaki, Tsuyoshi Kimura, Satoshi Kojima, Hiroyuki Higuchi
[Purpose] To compare the appearance time of the ventilatory threshold point and the electromyographic threshold in the activity of the vastus lateralis, rectus femoris, biceps femoris long head and gastrocnemius lateral head muscles during ramp cycling exercise in elderly males. [Subjects and Methods] Eleven community dwelling elderly males participated in this study. Subjects performed exercise testing with an expiratory gas analyzer and surface electromyography to evaluate the tested muscle activities during ramp exercise...
November 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/27923984/short-term-effect-of-volume-recruitment-derecruitment-manoeuvre-on-chest-wall-motion-in-duchenne-muscular-dystrophy
#11
Henri Meric, Line Falaize, Didier Pradon, Matthieu Lacombe, Michel Petitjean, David Orlikowski, Hélène Prigent, Frédéric Lofaso
Because progressive respiratory muscle weakness leads to decreased chest-wall motion with eventual ribcage stiffening, the purpose was to compare vital capacity (VC) and contributions of chest-wall compartments before and after volume recruitment-derecruitment manoeuvres (VRDM) in Duchenne muscular dystrophy (DMD). We studied nine patients with DMD and VC lower than 30% of predicted. VRDM was performed using 15 insufflations-exsufflations of +30 to -30 cmH2O. VC and three-dimensional chest-wall motion were measured, as well as oxygen saturation, transcutaneous partial pressure of carbon dioxide and the rapid shallow breathing index (respiratory rate/tidal volume) before (baseline) and immediately and 1 hour after VRDM...
December 6, 2016: Chronic Respiratory Disease
https://www.readbyqxmd.com/read/27908613/sparc-interacts-with-actin-in-skeletal-muscle-in%C3%A2-vitro-and-in%C3%A2-vivo
#12
Louise H Jørgensen, Pia Lørup Jepsen, Anders Boysen, Line B Dalgaard, Lars G Hvid, Niels Ørtenblad, Dea Ravn, Jeeva Sellathurai, Jakob Møller-Jensen, Hanns Lochmüller, Henrik D Schrøder
The cytoskeleton is an integral part of skeletal muscle structure, and reorganization of the cytoskeleton occurs during various modes of remodeling. We previously found that the extracellular matrix protein secreted protein acidic and rich in cysteine (SPARC) is up-regulated and expressed intracellularly in developing muscle, during regeneration and in myopathies, which together suggests that SPARC might serve a specific role within muscle cells. Using co-immunoprecipitation combined with mass spectrometry and verified by staining for direct protein-protein interaction, we find that SPARC binds to actin...
November 28, 2016: American Journal of Pathology
https://www.readbyqxmd.com/read/27905901/presynaptic-neuromuscular-transmission-defect-in-the-stiff-person-syndrome
#13
Y L Lo, Y E Tan
BACKGROUND: The stiff person syndrome (SPS) is a rare disorder characterized by muscular rigidity and stiffness. CASE PRESENTATIONS: We describe an SPS patient presenting with longstanding fatigue and electrophysiological evidence of presynaptic neuromuscular transmission defect, who responded to administration of pyridostigmine. In contrast, no electrophysiolgical evidence of neuromuscular transmission defect was demonstrated in 2 other SPS patients without fatigue symptoms...
December 1, 2016: BMC Neurology
https://www.readbyqxmd.com/read/27896952/muscle-strength-in-breast-cancer-patients-receiving-different-treatment-regimes
#14
Oliver Klassen, Martina E Schmidt, Cornelia M Ulrich, Andreas Schneeweiss, Karin Potthoff, Karen Steindorf, Joachim Wiskemann
BACKGROUND: Muscle dysfunction and sarcopenia have been associated with poor performance status, an increased mortality risk, and greater side effects in oncologic patients. However, little is known about how performance is affected by cancer therapy. We investigated muscle strength in breast cancer patients in different adjuvant treatment settings and also compared it with data from healthy individuals. METHODS: Breast cancer patients (N = 255) from two randomized controlled exercise trials, staged 0-III and aged 54...
November 28, 2016: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/27893858/reversing-age-related-changes-of-the-laryngeal-muscles-by-chronic-electrostimulation-of-the-recurrent-laryngeal-nerve
#15
Michael Karbiener, Jonathan C Jarvis, Justin D Perkins, Hermann Lanmüller, Martin Schmoll, Hanna S Rode, Claus Gerstenberger, Markus Gugatschka
Age related atrophy of the laryngeal muscles -mainly the thyroarytenoid muscle (TAM)- leads to a glottal gap and consequently to a hoarse and dysphonic voice that significantly affects quality of life. The aim of our study was to reverse this atrophy by inducing muscular hypertrophy by unilateral functional electrical stimulation (FES) of the recurrent laryngeal nerve (RLN) in a large animal model using aged sheep (n = 5). Suitable stimulation parameters were determined by fatiguing experiments of the thyroarytenoid muscle in an acute trial...
2016: PloS One
https://www.readbyqxmd.com/read/27867375/ceftriaxone-pulse-dosing-fails-to-eradicate-biofilm-like-microcolony-b-burgdorferi-persisters-which-are-sterilized-by-daptomycin-doxycycline-cefuroxime-without-pulse-dosing
#16
Jie Feng, Shuo Zhang, Wanliang Shi, Ying Zhang
Although the majority of Lyme disease patients can be cured, at least 10-20% of the patients continue to suffer from persisting symptoms such as fatigue, muscular and joint pain, and neurologic impairment after standard 2-4 week antibiotic treatment. While the causes for this post-treatment Lyme disease symptoms are unclear, one possibility is due to Borrelia burgdorferi persisters that are not effectively killed by current antibiotics such as doxycycline or amoxicillin used to treat Lyme disease. A previous study showed that four rounds of ceftriaxone pulse dosing treatment eradicated B...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27863443/gait-assessment-with-solesound-instrumented-footwear-in-spinal-muscular-atrophy
#17
Jacqueline Montes, Damiano Zanotto, Sally Dunaway Young, Rachel Salazar, Darryl C De Vivo, Sunil Agrawal
BACKGROUND: Gait impairment is common in spinal muscular atrophy (SMA) and is described using clinical assessments and instrumented walkways. Continuous over-ground walking has not been studied. METHODS: Nine SMA participants completed the six-minute walk test (6MWT) and 10-meter walk/run wearing instrumented footwear (SoleSound). Data were simultaneously collected using a reference system (GAITRite(TM) ). The root mean square error (RMSE) indicated criterion validity...
November 18, 2016: Muscle & Nerve
https://www.readbyqxmd.com/read/27857248/physical-and-psychological-effects-of-a-12-session-cancer-rehabilitation-exercise-program
#18
Tricia M Smith, Christine N Broomhall, Anne R Crecelius
BACKGROUND: The positive effects of regular exercise for cancer survivors are becoming increasingly apparent. However, comprehensive examination of the benefits of modest levels of physical activity is somewhat lacking. OBJECTIVES: This study aimed to test the hypothesis that participating in a 12-session exercise program will improve depression, fatigue, aerobic endurance, muscular strength, and quality of life (QOL) in patients with cancer. METHODS: A group of 20 older adult women with a prior cancer diagnosis were evaluated during a 6- to 10-week exercise program that occurred twice weekly...
December 1, 2016: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/27856712/rates-of-performance-loss-and-neuromuscular-activity-in-men-and-women-during-cycling-evidence-for-a-common-metabolic-basis-of-muscle-fatigue
#19
Christopher W Sundberg, Sandra K Hunter, Matthew W Bundle
The durations that muscular force and power outputs can be sustained until failure fall predictably on an exponential decline between an individual's 3-s burst maximum to the maximum performance they can sustain aerobically. The exponential time constants describing these rates of performance loss are similar across individuals suggesting that a common metabolically-based mechanism governs muscle fatigue; however, these conclusions come from studies mainly on men. To test whether the same physiological understanding can be applied to women, we compared the performance-duration relationships and neuromuscular activity between 7 men (23...
November 17, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27845667/walking-with-a-backpack-using-load-distribution-and-dynamic-load-compensation-reduces-metabolic-cost-and-adaptations-to-loads
#20
Joon-Hyuk Park, Paul Stegall, Haohan Zhang, Sunil Agrawal
In this study, we showed a way of reducing the metabolic cost of walking with a backpack using load distribution and dynamic load compensation, provided by a wearable upper body device. This device distributes the backpack load between the shoulders and the pelvis, senses the vertical motion of the pelvis, and provides gait synchronized compensatory forces to reduce the dynamic loads from a backpack. It was hypothesized that by reducing dynamic loads from a backpack during load carriage, the users gait and postural adaptation, muscular effort and metabolic cost would be reduced...
November 9, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
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