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São Paulo, São Paulo, Brazil
Professor da EEFE-USP; Praticante e Pesquisador de Judô; Preparador físico de atletas de modalidades esportivas de combate.

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sexta-feira, 18 de fevereiro de 2011

Artigo na PMS aborda EMG em karatecas

Percept Mot Skills. 2010 Dec;111(3):722-34.

Electromechanical delay in ballistic movement of superior limb: comparison between karate athletes and nonathletes.
Rodrigues Ferreira MA, Vences Brito A.
Sports Sciences School of Rio Maior, Polytechnic Institute of Santarém. marioarf@gmail.com
Abstract
The aim of the study was to analyze electromechanical delay in a ballistic movement of the superior limb. 10 male karate athletes and 9 nonathletes (without karate experience) performed a motor skill as fast and powerfully as possible, with impact on a makiwara (karate training instrument). For each participant, 10 choku-zuki performances were analyzed. Kinematics and surface electromyographic (EMG) activity of the anterior and posterior portions of deltoid, pectoralis major, latissimus dorsi, triceps brachii, and biceps brachii were recorded. Athletes had significantly shorter delay in arm flexion agonist muscles and significantly higher delay in arm flexion antagonist muscles and in forearm extension agonists. Results suggest that enhanced performance in athletes was mainly due to motor learning.

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