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Muscular fatigue

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https://www.readbyqxmd.com/read/28212266/individual-patterns-in-blood-borne-indicators-of-fatigue-trait-or-chance
#1
Ross Julian, Tim Meyer, Hugh H K Fullagar, Sabrina Skorski, Mark Pfeiffer, Michael Kellmann, Alexander Ferrauti, Anne Hecksteden
Julian, R, Meyer, T, Fullagar, HHK, Skorski, S, Pfeiffer, M, Kellmann, M, Ferrauti, A, and Hecksteden, A. Individual patterns in blood-borne indicators of fatigue-trait or chance. J Strength Cond Res 31(3): 608-619, 2017-Blood-borne markers of fatigue such as creatine kinase (CK) and urea (U) are widely used to fine-tune training recommendations. However, predictive accuracy is low. A possible explanation for this dissatisfactory characteristic is the propensity of athletes to react to different patterns of fatigue indicators (e...
March 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28199218/surface-emg-and-muscle-fatigue-multi-channel-approaches-to-the-study-of-myoelectric-manifestations-of-muscle-fatigue
#2
Marco Gazzoni, Alberto Botter, Taian Vieira
On a broad view, fatigue is used to indicate a somewhat degree of weariness. On the muscular level, fatigue posits the reduced capacity of muscle fibres to produce force, even in the presence of motor neuron excitation via either spinal mechanisms or electric pulses applied externally. Prior to decreased force, when sustaining physically demanding tasks, alterations in the muscle electrical properties take place. These alterations, termed myoelectric manifestation of fatigue, can be assessed non-invasively with a pair of surface electrodes positioned appropriately on the target muscle; traditional approach...
February 15, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28195978/lack-of-influence-of-muscular-performance-parameters-on-spatio-temporal-adaptations-with-increased-running-velocity
#3
Luis E Roche-Seruendo, Felipe García-Pinillos, Joana Haicaguerre, Ana V Bataller-Cervero, Víctor M Soto-Hermoso, Pedro Á Latorre-Román
This study aimed to analyse the influence of muscular performance parameters on spatio-temporal gait characteristics during running when gradually increasing speed. 51 recreationally trained male endurance runners (age: 28 ± 8 years) voluntarily participated in this study. Subjects performed a battery of jumping tests (squat jump, countermovement jump, and 20 cm drop jump), and after that, the subjects performed an incremental running test (10 to 20 km/h) on a motorized treadmill. Spatio-temporal parameters were measured using the OptoGait system...
February 8, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28132977/mitochondrial-trifunctional-protein-deficiency-an-adult-patient-with-similar-progress-to-charcot-marie-tooth-disease
#4
Yuki Yamamoto, Naoko Matsui, Yu Hiramatsu, Yoshimichi Miyazaki, Hiroyuki Nodera, Yuishin Izumi, Hiroshi Takashima, Ryuji Kaji
A 45-year-old man presented to us due to slowly progressive muscle weakness and sensory disturbances in his lower limbs since his 40's. He reported multiple episodes of exercise-induced severe muscle fatigue and brown urine in his childhood, which disappeared by age 20. A nerve conduction study showed peripheral axonal neuropathy and then Charcot-Marie-Tooth disease (CMT) was considered as the most likely diagnosis; however, exome sequencing failed to identify a mutation in the known genes of CMTs. Since age 55, he recurrently developed severe rhabdomyolysis that required hospitalization...
January 28, 2017: Rinshō Shinkeigaku, Clinical Neurology
https://www.readbyqxmd.com/read/28129235/short-term-neuromuscular-electrical-stimulation-training-of-the-tibialis-anterior-did-not-improve-strength-and-motor-function-in-facioscapulohumeral-muscular-dystrophy-patients
#5
Aude-Clémence M Doix, Karin Roeleveld, Jérémy Garcia, Pauline Lahaut, Véronique Tanant, Manuella Fournier-Mehouas, Claude Desnuelle, Serge S Colson, Sabrina Sacconi
OBJECTIVE: The aim of this study was to investigate the effects on motor function, muscle strength, and endurance of short-term neuromuscular electrical stimulation training of the tibialis anterior muscles in patients with facioscapulohumeral muscular dystrophy type 1 (FSHD1) in comparison with healthy controls. DESIGN: This prospective study included 10 patients with FSHD1 and 10 healthy participants. Maximal voluntary isometric contraction of ankle dorsiflexion and a 2-min sustained dorsiflexion maximal voluntary contraction with surface electromyography recordings of the tibialis anterior and the soleus muscles were measured and motor function clinical tests were performed before and after the training period...
January 26, 2017: American Journal of Physical Medicine & Rehabilitation
https://www.readbyqxmd.com/read/28101567/influence-of-arm-crank-ergometry-on-development-of-lymphedema-in-breast-cancer-patients-after-axillary-dissection-a-randomized-controlled-trail
#6
Thorsten Schmidt, Jette Berner, Walter Jonat, Burkhard Weisser, Christioph Röcken, Marion van Mackelenbergh, Christoph Mundhenke
OBJECTIVE: To investigate the safety and efficacy of arm crank ergometry in breast cancer patients after axillary lymph node dissection, with regard to changes in bioelectrical impedance analysis, arm circumference, muscular strength, quality of life and fatigue. DESIGN: Randomized controlled clinical intervention trial. SUBJECTS: Forty-nine patients with breast cancer after axillary lymph node dissection. METHODS: Arm crank ergometer training twice-weekly was compared with usual care over 12 weeks...
January 19, 2017: Journal of Rehabilitation Medicine
https://www.readbyqxmd.com/read/28101413/significant-and-sustaining-elevation-of-blood-oxygen-induced-by-chinese-cupping-therapy-as-assessed-by-near-infrared-spectroscopy
#7
Ting Li, Yaoxian Li, Yu Lin, Kai Li
Cupping therapy has been used in traditional Chinese medicine for thousands of years to relieve muscle pain/tendency/fatigue and to cure or reduce symbols of other diseases. However, its therapeutic effect is sparsely interpreted in the language of modern physiology. To objectively evaluate its therapeutic effect, we focused on dry cupping treatment and utilized near-infrared spectroscopy (NIRS) to assess the concentration change in oxy-hemoglobin ([HbO2]), deoxy-hemoglobin ([Hb]), and blood volume in the course of cupping therapy over 13 volunteers on the infraspinatus muscle, where is usually applied for shoulder pains...
January 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28095374/human-cytomegalovirus-infection-in-nonimmunocompromised-patients-a-retrospective-analysis-and-review-of-the-literature
#8
Konstantin Zedtwitz-Liebenstein, Magda Diab-Elschahaw, Michael Frass
In a retrospective analysis of patients visiting the Outpatient Department of the Division of Infectious Diseases and Tropical Medicine over a period of 3 years, we found a high incidence of symptomatic nonsevere human cytomegalovirus (HCMV) infection in nonimmunocompromised patients. We present 11 symptomatic cases of HCMV infection in nonimmunocompromised patients with non-life-threatening symptoms like long-lasting depletion, fatigue, and subfebrile fever with or without muscular pain and arthralgia. Although the symptoms were not life-threatening, all of the patients suffered a prolonged duration of the disease until improvement...
January 18, 2017: Intervirology
https://www.readbyqxmd.com/read/28092056/a-randomised-placebo-controlled-crossover-study-investigating-the-effects-of-nicotine-gum-on-strength-power-and-anaerobic-performance-in-nicotine-na%C3%A3-ve-active-males
#9
Toby Mündel, Marine Machal, Darryl J Cochrane, Matthew J Barnes
BACKGROUND: Nicotine use amongst athletes is high and increasing, especially team sports, yet the limited previous studies investigating the performance consequences of this behaviour have not examined the effects of the principal active ingredient, nicotine, per se. Therefore, we determined whether nicotine gum affected muscular and anaerobic performance. METHODS: Nine active males (24 ± 3 years) completed three trials in a random order in which 20 min prior to testing they chewed 2 mg (NIC-2), 4 mg (NIC-4) nicotine or flavour-matched placebo (PLA) gum...
December 2017: Sports Medicine—Open
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
#10
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
#11
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
#12
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
#13
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
#14
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; the proximal position (PP), with only the wrist rested on the desk. The subjects performed a 16-min task in each position...
January 27, 2017: 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
#15
Samuel L Battalio, Arielle M Silverman, Dawn M Ehde, Dagmar Amtmann, Karlyn A Edwards, Mark P Jensen
OBJECTIVES: 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, and sleep disturbance); and to examine the potential moderating effect of sex, age, and diagnosis on the hypothesized associations between resilience and function. DESIGN: Cross-sectional survey study...
December 18, 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
#16
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
#17
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
#18
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
#19
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
#20
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
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