标题：Influence of type of movement termination and sport practice on muscle activity during elbow extension movements. (Efecto del tipo de finalización del movimiento y práctica deportiva sobre la actividad muscular en el movimiento de extensión del codo).
期刊名称：RICYDE. Revista Internacional de Ciencias del Deporte. doi:10.5232/ricyde
印刷版ISSN：1885-3137
出版年度：2008
卷号：4
期号：12
页码：72-84
语种：English
出版社：Ramón Cantó Alcaraz (Publisher)
摘要：Abstract Twenty participants were tested on rapid elbow extension movements. This experiment examined the effects of the type of termination (pointing vs. impact movements) and sport practice (karate vs. volleyball) on temporary specific electromyographic (EMG) and kinematic measures during elbow extension movements. EMG was recorded from triceps (main agonist) and biceps (main antagonist). The analysis of variance on the type of movement showed differences on the time from onset of EMG activation to peak EMG in agonist and antagonist when these variables are normalized to a proportion of total movement time. Also, correlation analysis showed strong correlations between the kinematic variables and the time from onset of EMG antagonist to peak EMG. This variable is the only EMG variable that presented differences in the analysis between sport groups. The results allow us to conclude that the delay in the biceps action expressed in the time from onset EMG activation to peak EMG normalized to a proportion of total movement time is an indicator of the performance level in fast movements. Key-Words/Palabras clave : electromyography | elbow joint | volleyball | karate | impact movement | pointing movement | electromiografía | articulación de codo | voleibol | kárate | movimiento de impacto | movimiento de marcaje Resumen Veinte sujetos fueron evaluados durante la realización de rápidos movimientos de extensión del codo. En este trabajo se analizan los efectos que el tipo de finalización del movimiento (marcaje vs. golpeo) y el tipo de práctica deportiva (voleibol vs. kárate) tienen sobre variables específicas temporales de electromiografía cinemáticas y de electromiografía (EMG) Se registró la actividad EMG del tríceps (principal músculo agonista) y del bíceps (principal músculo antagonista). El análisis de la varianza acerca del tipo de movimiento mostró diferencias respecto al tiempo de comienzo de la activación EMG hasta el pico de actividad EMG del agonista y antagonista cuando esas variables eran normalizadas con respecto al tiempo total de movimiento. Además, el análisis de correlación realizado mostró correlaciones significativas entre las variables cinemáticas y el tiempo desde el comienzo de la actividad EMG del antagonista hasta su pico de actividad. Esta variable es la única considerada acerca de la actividad EMG que muestra diferencias en el análisis entre grupos. Los resultados nos han permitido concluir que el retraso en la acción del bíceps, expresado en el tiempo desde el comienzo de la activación EMG hasta su pico normalizado respecto al tiempo de movimiento, es un indicador del nivel de ejecución en un movimiento balístico como el utilizado en este estudio. doi:10.5232/ricyde2008.01205 Texto completo en PDF --------------------------------------------------------------------- References/referencias Brown, S.H.C.; Cooke J.D. (1981) Amplitude and instruction dependent modulation of movement related electromyogram activity in humans. Journal of Physiology, 316, 97-107. PMid:7320884 PMCid:1248138 Buchman, A.S.; Leurgans, S.; Gottlieb, G.L.; Chen, C.H.; Almeida, G.L. and Corcos, D.M. (2000) Effect of age and gender in the control of elbow flexion movements. Journal of Motor Behavior, 32, 391-399. doi:10.1080/00222890009601388 PMid:11114231 Ervilha, U.; Arendt-Nielsen, L. (2004) The effect of muscle pain on elbow flexion and coactivation tasks. 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关键词：electromyography;elbow joint;volleyball;karate; impact movement;pointing movement;electromiografía;articulación de codo;voleibol;kárate;movimiento de impacto;movimiento de marcaje
