筋力指標に関する研究 : 筋力に及ぼす諸実験条件について
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概要
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Some factors influencing the tension development of human muscles at the maximal exertion was analyzed in order to find out some desirable indicators of the characteristics of the voluntary exertion of muscle force. 1) The isometric tension development of the maximal exertion of hand-gripping and arm-bending was recorded simultaneously with the measurement of electromyogram, respiratory curve,electrocardiogram and reaction time. The subjects were all male and 22 to 61 years old. 2) The length of time needed to exert muscle force from 20 to 80% of each recorded maximal force exerted maximally was nearly constant so far as the interval and number of repetition was less than 5 sec and 30 respectively. The correlation coefficient between the standard deviation of the undulating descending curve of the decrease in maximal muscle force during repetition described above and that of this length of time from 20 to 80% defined here was +0.64. 3) The values of tan θ and tan φ calculated form the (P_<max>-P)-log t relation were in some cases found to decrease during repetitive exertion under the same conditions as mentioned above, but the decrease was in most cases not so remarkable. The values of tan θ and tan φ ranged from 0.1 to 0.2 (kg/msec) and from 0.3 to 0.5 (kg) respectively. 4) The maximal force of hand gripping was measured immediately after a conditioning exertion of force of various intensity (i. e. 25, 50 and 75% of the maximal force of hand gripping exerted maximally by each subject prior to the measurement). The tan φ and tan θ were maximal when no conditioning was loaded, and they decreased with increasing intensity of conditioning exertion.
- 日本体力医学会の論文
- 1972-03-01
著者
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