Sports medical analysis on masticatory muscles function in volleyball and handball players.

Ohkawa Shuji, Shinohara Kiwa, Hashihara Makio, Adachi Shingo, Gurita Toshiyuki, Komura Ikuhiro, Yoshida Mitsuyoshi, Nishinaka Hisao, Yatuzuka Nobuhiro, Abe Yasuhiko, Tsuga Kazuhiro, Akagawa Yasumasa, Fukuba Yoshiyuki

doi:10.7144/sgf.1.33

The purpose of this study was to investigate the relationship between masticatory muscles function and exercise of the whole body in sports. Ten players in the volleyball team“JT”and ten players in the handball team“Wakunaga Pharmacy”volunteered as subjects for this project. Two kinds of spike (the most powerful spike with jump, slight spike without jump) in vol-leyball and two kinds of shoot (the most powerful shoot with jump, pass without jump) in handball were selected as the test exercise of the whole body. Electromyographic signals during spiking volleyballs or shooting handballs were recorded in subjects from both sides of M.Temporalis Anterior and M.Masseter, from the test side of M.Biceps Brachii, M. Triceps Brachii, and M. Flexor Carpi Ulnaris by means of surface electrodes and telemetry EMG device units. Furthermore, spiking or shooting forms were recorded by use of the video camera. Following results were obtained; 1. Clear activity of four masticatory muscles during spiking volleyballs or shooting handballs was shown in all subjects. 2. There was a positive correlation between masticatory muscles activity during spiking volleyballs or shooting handballs (the duration and the ratio to maximum-clenching muscles activity) and the strength and form of spik-ing or shooting. Those results suggest that the masticatory muscles may play a significant role in the exercise of the whole body in sports.

Sports medical analysis on masticatory muscles function in volleyball and handball players.

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