Aplicacions de l’electromiografia de superfície a l’esport

Massó, Núria; Rey, Ferran; Romero, Dani; Gual, Gabriel; Costa, Lluís; Germán, Ana

doi:10.1016/j.apunts.2010.02.005

Cited by 33 publications

(28 citation statements)

References 89 publications

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“…Furthermore, the precise relationship between metabolic cost and muscle activity is still unclear, especially because EMG measurements are not directly indicative of muscle force production (Türker and Sözen, 2013;Vigotsky et al, 2018). Many factors that may have been altered by wearing the X-tights, such as muscle fascicle length, muscle geometry, and passive structural components, can also contribute to force production and cannot be identified with surface EMGs alone (Mesin et al, 2006;Massó et al, 2010;Farris et al, 2013). The present study was not equipped to analyze these physiological parameters.…”

Section: Discussionmentioning

confidence: 99%

A Fully Soft and Passive Assistive Device to Lower the Metabolic Cost of Sit-to-Stand

Lee

Kim

Park

2020

Front. Bioeng. Biotechnol.

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Various assistive devices like exoskeletons have been developed to aid the growing number of disabled people. Recent studies have started to explore using soft rather than rigid components to create lightweight and unobtrusive systems that can be more easily adopted by the general population. However, there is a tradeoff between compliance and power in these systems. We investigated the physiological benefits of using an inconspicuous, soft and passive assistive device which would avoid bulkiness, heaviness and user discomfort. We chose to assist the sit-to-stand (STS) maneuver because it is a common activity of daily living (ADL). STS is also recognized as one of the most challenging ADLs due to the high knee torque required, and the primary limiting factor is known to be knee extensor strength. Thus, the objective of this research was to develop and evaluate an unobtrusive knee assist wear called X-tights that could aid knee extension during STS using only soft and passive components. This was accomplished by routing elastic bands across the lower extremity. Thirty-one healthy participants performed STS tests with and without the X-tights, while metabolic cost and muscle activity were recorded. Metabolic power significantly decreased, by 3.2 ± 1.5% (P = 0.04), when utilizing the X-tights during the STS, while there was no statistically significant differences in muscle activity. The present work introduces a new soft and passive assist wear that can be worn inconspicuously under normal clothing, and we demonstrate promising results for the future development and integration of soft assistive technology for daily life.

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Section: Discussionmentioning

confidence: 99%

A Fully Soft and Passive Assistive Device to Lower the Metabolic Cost of Sit-to-Stand

Lee

Kim

Park

2020

Front. Bioeng. Biotechnol.

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“…In this context, functional and molecular adaptations in skeletal muscle tissue under hypoxic conditions are achieved [3]. Electromyography (EMG) is an indirect diagnostic device to evaluate the electrical activity produced in muscles by a nerve impulse that generates a potential for action in the membrane of myocytes in situations of rest or activation phase [4,5]. In general, EMG can be classified according to the test protocol conducted on the individual being evaluated: resting EMG (determines basal muscular electrical activity), voluntary EMG (assesses muscular response after the action), and EMG with evoked potentials (evaluates motor units) [6].…”

Section: Introductionmentioning

confidence: 99%

Electromyography: A Simple and Accessible Tool to Assess Physical Performance and Health during Hypoxia Training. A Systematic Review

et al. 2020

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Hypoxia causes reduced partial pressure of oxygen in arterial blood and induces adaptations in skeletal muscle that may affect individuals’ physical performance and muscular health. These muscular changes are detectable and quantifiable by electromyography (EMG), an instrument that assesses electrical activity during active contraction at rest. EMG is a relatively simple and accessible technique for all patients, one that can show the degree of the sensory and motor functions because it provides information about the status of the peripheral nerves and muscles. The main goal of this review is to evaluate the scientific evidence of EMG as an instrument for monitoring different responses of skeletal muscles subjected to external stimuli such as hypoxia and physical activity. A structured search was conducted following the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines in Medline/PubMed, Scielo, Google Scholar, Web of Science, and Cochrane Library Plus. The search included articles published in the last 25 years until May 2020 and was restricted to English- and Spanish-language publications. As such, investigators identified nine articles that met the search criteria. The results determined that EMG was able to detect muscle fatigue from changes in the frequency spectrum. When a muscle was fatigued, high frequency components decreased and low frequency components increased. In other studies, EMG determined muscle activation increased during exercise by recruiting motor units and by increasing the intensity of muscle contractions. Finally, it was also possible to calculate the mean quadriceps quadratic activity used to obtain an image of muscle activation. In conclusion, EMG offers a suitable tool for monitoring the different skeletal muscle responses and has sufficient sensitivity to detect hypoxia-induced muscle changes produced by hypoxic stimuli. Moreover, EMG enhances an extension of physical examination and tests motor-system integrity.

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“…Los comienzos de dichos estudios, aunque rudimentarios, dieron inicio al conocimiento de la relación entre el sistema nervioso y el muscular. Trabajos como los de Redi (1666) y Walsh (1773) con musculatura de la raya eléctrica (pez de la familia Torpedinidae) (Wu, 2007 (Floyd y Silver, 1950), fenómeno denominado cross-talk (Massó et al, 2010). Cada músculo se examinó mediante la colocación de dos electrodos, separados por una distancia de uno o dos centímetros entre ellos Para los oblicuos externos derechos e izquierdos se ubicaron un par de electrodos simétricamente sobre la espina ilíaca antero superior, en un punto equidistante de la cresta ilíaca y de las costillas.…”

Section: Electromiografiasunclassified

“…Las características inherentes a las pruebas electromiográficas la transforman en el método de electrodiagnóstico más útil en el estudio de la función motriz. El método presenta cualidades tales como un grado elevado de objetividad, especialmente si se hace uso de las técnicas electromiográficas de carácter cuantitativo (Massó et al, 2010). Además, en estudios clínicos se manifiesta su precocidad en el diagnóstico, tanto en el diagnóstico anatomopatológico, señalando la magnitud de la lesión (compresión, sección afónica sección de nervio), como en el diagnóstico topográfico (médula, raíz anterior, plexos nerviosos, troncos nerviosos) (Massó et al, 2010).…”

Section: Acerca De Los Estudios Electromiográficosunclassified

“…El método presenta cualidades tales como un grado elevado de objetividad, especialmente si se hace uso de las técnicas electromiográficas de carácter cuantitativo (Massó et al, 2010). Además, en estudios clínicos se manifiesta su precocidad en el diagnóstico, tanto en el diagnóstico anatomopatológico, señalando la magnitud de la lesión (compresión, sección afónica sección de nervio), como en el diagnóstico topográfico (médula, raíz anterior, plexos nerviosos, troncos nerviosos) (Massó et al, 2010). Por último, es capaz de generar datos que contribuyen a la rapidez en el pronóstico, dando cuenta de los primeros signos de regeneración nerviosa antes de cualquier manifestación clínica.…”

Section: Acerca De Los Estudios Electromiográficosunclassified

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Anatomía funcional de los músculos de la pared antero lateral del abdomen

Hijano¹

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Clásicamente se ha descrito al recto mayor, junto a los músculos que lo envainan en su estuche fibro-muscular, como los que integran activamente el mecanismo de contención en el abdomen. Sin embargo, en la bibliografía relevada, se denota una falta de especificidad en las funciones de cada músculo. Puesto que algunos estudios sugieren que en vertebrados inferiores el oblicuo externo está involucrado en la locomoción cuadrúpeda y en el mecanismo respiratorio, es razonable hipotetizar sobre su real papel en la contención visceral. Por todo esto es que planteamos como objetivo general del presente trabajo determinar la funcionalidad específica del músculo oblicuo externo como contenedor del abdomen. Para analizar esto hemos utilizado diversos métodos de estudio como electromiografías, ecografías, disecciones anatómicas en cadáveres humanos y de diversas especies y cirugías de pared abdominal. Durante las electromiografías y ecografías hemos encontrado que los mayores cambios del oblicuo externo se observaron durante la espiración forzada. Los resultados obtenidos a partir de las cirugías demostraron que el elemento a ser reparado para que no ocurra una la eventración debe ser el transverso. A partir de estas aproximaciones comprobamos que ambos oblicuos se comportan como músculos exteriores a la caja toracoabdominal, sin que revistan importancia en la estabilidad del contenido visceral. Concluimos entonces que el transverso, el más profundo de la pared antero lateral y posterior del abdomen, por su disposición intratorácica y su fuerte inserción posterior, con su consecuente llegada a la línea media en toda su extensión tanto supra, como infraumbilical, demuestra ser el verdadero elemento de contención.

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Aplicacions de l’electromiografia de superfície a l’esport

Cited by 33 publications

References 89 publications

A Fully Soft and Passive Assistive Device to Lower the Metabolic Cost of Sit-to-Stand

A Fully Soft and Passive Assistive Device to Lower the Metabolic Cost of Sit-to-Stand

Electromyography: A Simple and Accessible Tool to Assess Physical Performance and Health during Hypoxia Training. A Systematic Review

Anatomía funcional de los músculos de la pared antero lateral del abdomen

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