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Jpn J Biomechanics Sports Exercise 7(3):170-178, 2003

Robotics and electromyographic kinesiology analyses of in front handsprings in tumbling

OKA Hideo1), ICHITANI Koichiro2), KUMAMOTO Minayori3)

1) Department of Practical Life Studies, Hyogo University of Teacher Education
2) Faculty of Engineering, Osaka Electro-Communication University
3) Laboratories of Image Information Science and Technology

Abstract

In this study, the electrical activity patterns of the antagonistic bi-articular and mono-articular muscles of upper extremity, during in the hand contact period of in front handsprings in tumbling, were analyzed in terms of electromyographic (EMG) kinesiology and robotics. The mechanical two-joint link models equipped with a pair of the antagonistic bi-articular muscles in addition to two pairs of the antagonistic mono-articular muscles were used for robotics analyses. Reversal of triceps brachii long head (Tlo) and biceps brachii long head (Blo) activities was responsible for changes in the output force direction during the hand contact period. It was confirmed that the coordinating activity pattern of three pairs of the antagonistic muscles contributed to the output force control and the output force direction control. The results obtained here suggest the importance and necessity for coordinated muscle activities of bi-articular and mono-articular antagonistic muscles for analyses of sports.

Key Words: in front handsprings in tumbling, bi-articular muscles, EMG kinesiology, robotics

Submittted for Publication : October 2, 2002,

Accepted for Publication : May 21, 2003

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