最大筋力発揮に及ぼす呼吸相の影響

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The purpose of this study was to investigate the effects of maximum elbow flexor strength exerted during different respiratory phases. Twelve healthy male subjects, aged from 18 to 22 years, participated. Each subjects was asked to exert his maximum elbow flexor strength in holding the elbow joint at right angle under the 4 different conditions (expiring, inspiring, breath holding and shouting). The EMG activities of m. biceps brachii and m. triceps brachii were recorded with bipolar surface electrodes. The respiratory phase and the sound of shouting were recorded with a themistor and microphone, respectively. The fo1lowing results were obtained: 1) The peak value for maximum strength increased in the order expiring, inspiring, breath holding and shouting. The relative values based on the peak value for breath holding were 92.02%, 92.34%, 104.25% in right elbow flexing and 94.68%, 96.71%, 108.43% in light elbow flexing, respectively. 2) The correlations of the peak value for maximum strength in the various respiratory phases were significant. 3) The rate of tension rise increased in the order expiring, inspiring, breath holding and shouting. The relative values based on the rate of tension rise for breath holding were 72.97%, 72.93%, 195.03% in right elbow flexing and 81.64%, 74.75%, 184.11% in left elbow flexing, respectively. 4) Positively significant correlations in the rate of tension rise were found among the various respiration phases. 5) The correlations between the peak value for maximum strength and the rate of tension rise in each respiratory phase were positively significant. These results suggest that the effect of the respiratory phase on the rate of tension rise was significantly greater than on the peak value for maximum strength.
三重大学の論文

最大筋力発揮に及ぼす呼吸相の影響

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