Avaliação do ácido lático em indivíduos com hemiparesia pós-acidente vascular encefálico após estimulação elétrica para fortalecimento muscular

Corrêa, Fernanda Ishida; Corrêa, João Carlos Ferrari; Tessarolo, André de Almeida; Melo, André de Souza; Sampaio, Luciana Maria Malosá; Costa, Maricília Silva; Oliveira, Cláudia Santos

doi:10.1590/s1809-29502009000200015

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…The components of the signal acquisition system were connected to a signal conditioner module, in which the analogue signals were filtered in a 10 Hz to 1.000 Hz band-pass filter and amplified again with a 100-fold gain, achieving a final gain of 1000. The three pairs of surface electrodes were placed on the motor point of the Rectus femoris (RF), Vastus lateralis (VL) and Vastus medialis (VM), muscles of the dominant limb following the longitudinal direction of the muscle fibers (fixed inwardly to the skin by double-faced adhesive tape, with another piece of adhesive tape used outwardly, thereby providing better fixation of the electrodes) (16,17).…”

Section: Methodsmentioning

confidence: 99%

Determination of muscle fatigue index for strength training in patients with Duchenne dystrophy

et al. 2010

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INTRODUCTION: Muscle weakness is the most prominent impairment in Duchenne muscular dystrophy (DMD) and often involves the loss of functional ability as well as other limitations related to daily living. Thus, there is a need to maintain muscle strength in large muscle groups, such as the femoral quadriceps, which is responsible for diverse functional abilities. However, the load and duration of training for such rehabilitation has proven to be a great unknown, mainly due to the undesired appearance of muscle fatigue, which is a severe factor for the injury of muscle fibers. OBJECTIVES: The aim of the present study was to determine a fatigue index by means of surface electromyography (EMG) for the parameterization of muscle strengthening physiotherapy training. METHODS: A cross-sectional study (case series) was carried out involving four patients with DMD. Three pairs of surface electrodes were placed on the motor point of the Rectus femoris, Vastus lateralis and Vastus medialis of the dominant limb, maintaining the knee at 60º of flexion. The participants were instructed to perform the extension movement of this joint at four strength levels (100%, 80%, 60% and 40% of maximal voluntary isometric contraction). RESULTS: The slope of the linear regression line was used for the determination of the fatigue index, performed by Pearson's test on the median frequency of each strength level. CONCLUSION: Electromyographic measurements of the strength index for muscle training proved to be a simple accessible assessment method, as well as an extremely valuable tool, allowing the design of a muscle strength training program with an individualized load threshold.

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Section: Methodsmentioning

confidence: 99%

Determination of muscle fatigue index for strength training in patients with Duchenne dystrophy

et al. 2010

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“…Isso acontece, pois o musculo esquelético é composto por diferentes tipos de fibras sendo fibras musculares rápidas, lentas e outras fibras com características intermediárias, que são estimuladas eletricamente. Nos indivíduos com AVC, a estimulação elétrica no músculo não é suficiente para registrar qualquer diferença na dosagem de lactato sistemicamente causando, assim, a fadiga (47) .…”

Section: Titulação Instituição Da Titulaçãounclassified

Diagnósticos de enfermagem dos pacientes com Acidente Vascular Cerebral Isquêmico: uma pesquisa bibliográfica

Santos

Padula

Waters

2020

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“…The authors argue on a basis of their findings, that time of treatment may be reduced by implementing a "shorter duty cycle" instead.^^^^^ • Correa et al 50 15 reviewing 18 NMES trials noted that across these studies, duty cycle was reported in the range 3s -55s ON, 30s -2s OFF.…”

Section: State Of the Art: Duty Cycle Studies Of Pulsed Currentmentioning

confidence: 99%

Reporting for Duty: The duty cycle in Functional Electrical Stimulation research. Part I: Critical commentaries of the literature

2018

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There are several parameters that can be modulated during electrical stimulation-induced muscle contraction to obtain external work, i.e., Functional Electrical Stimulation (FES). The literature has several reports of the relationships of parameters such as frequency, pulse width, amplitude and physiological or biomechanical outcomes (i.e., torque) when these parameters are changed. While these relationships are well-described, lesser known across the literature is how changing the duty cycle (time ON and time OFF) of stimulation affects the outcomes. This review provides an analysis of the literature pertaining to the duty cycle in electrical stimulation experiments. There are two distinct sections of this review – an introduction to the duty cycle and definitions from literature (part I); and contentions from the literature and proposed frameworks upon which duty cycle can be interpreted (part II). It is envisaged that the two reviews will highlight the importance of modulating the duty cycle in terms of muscle fatigue in mimicking physiological activities. The frameworks provided will ideally assist in unifying how researchers consider the duty cycle in electrical stimulation (ES) of muscles.

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Avaliação do ácido lático em indivíduos com hemiparesia pós-acidente vascular encefálico após estimulação elétrica para fortalecimento muscular

Cited by 4 publications

References 13 publications

Determination of muscle fatigue index for strength training in patients with Duchenne dystrophy

Determination of muscle fatigue index for strength training in patients with Duchenne dystrophy

Diagnósticos de enfermagem dos pacientes com Acidente Vascular Cerebral Isquêmico: uma pesquisa bibliográfica

Reporting for Duty: The duty cycle in Functional Electrical Stimulation research. Part I: Critical commentaries of the literature

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