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Volume 23 (1974 - 197･･･
- Issue 4 Pages 117-
- Issue 3 Pages 89-
- Issue 2 Pages 53-
- Issue 1 Pages 1-
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Volume 23, Issue 1
Displaying 1-6 of 6 articles from this issue
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KUNIATSU NAGAMI1974 Volume 23 Issue 1 Pages 1-11
Published: March 01, 1974
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSThe purpose of this study is to investigate the reaction time of contraction and relaxation in human skeletal muscles at extremities.
Reaction time of relaxation of the muscle most involved in attempting given action with and without relaxation of contralateral muscles (passive relaxation, PR, and active relaxation, AR, respectively) . Tweleve subjects, including male and female junior high student and adults, were used for the first part of the experiment.
Additional subjects, four male and female adults who were engaged in relaxation training of elbow extensor muscles, were used, as the relationship between maximum tension curve of isometric exertion of elbow flexion and reaction time of relaxation in m. triceps brachii was studied.
The results may be summarized as follows :
1) The reaction time of muscular contraction (CR) was found to be the shortest, then AR and PR were increasingly longer in this order among male subjects, while no consistent trend in such conditions was found among females.
2) No significant differences between the results of right and left legs were found in both male and females.
3) The trend of reaction time diffrences in the case of arm muscles among female subjects was found to be different from the males, namely, PR, CR, and AR, respectively, PR being the shortest.
4) No significant differences were found between the results of left arm reaction times under various conditions of all subjects groups, while those of right arm showed significant differences between various groups.
5) AR length was shortened in two of from subjects who were engaged in 6-day long training of relaxation of triceps brachii muscles, in which no positive effort was given in contraction of elbow flexor muscles.
6) When tension production curve by time was analyzed upon measuring maximum isometric strength of elbow flexor muscles in quick contraction, greater tension curve was recognized in the above mentioned two subjects whose AR was lessened.View full abstractDownload PDF (5764K) -
TSUTOMU ARAKI, YOSHIAKI TODA, AKIRA TSUJINO1974 Volume 23 Issue 1 Pages 12-24
Published: March 01, 1974
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSAs an index of bodily adaptation development for muscular exercise two groups of subjects (T-group, trained, and U-group, untrained) were studied under a fixed environmental condition. All the member of T-group responded with quicker rises in the sweat rate, as if their bodies anticipated and took measures against the impending rise of body temperature, and attained early at the individual steady levels, in moderate or low load exercise ; moreover their Cl losses in the sweat were remarkably low, thus effectively keeping the internal environment of the body (this time the ion concentration of the blood) less disturbed. Together with other findings, we infer that physical training sets our body more efficient in dealing with the excessive heat produced by muscular exertion.View full abstractDownload PDF (1641K) -
(1) ESPECIALLY ON THE ADVANTAGE OF KNEELING EXERCISE IN STEP TESTAKIHISA HASEBE, HISASHI SASAO, CHIEKO ADACHI, ETSUKO TAIHEI, HITOSHI Y ...1974 Volume 23 Issue 1 Pages 25-31
Published: March 01, 1974
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSA simple method of evaluation and measurement of endurance of the whole body for exercise prescription for sportsmen was previously reported. In the present study, a method of loading for general population was deviced and is the subject of the present communication.
The site of loading was divided into relatively localized portions of the lower extremity, upper extremity and trunk.
By substituting the kneeling exercise with step test, individual difference in body height was corrected.View full abstractDownload PDF (9842K) -
MICHIKATSU KONNO, TAKUJI MASUDA, YUTAKA YOSHIMIZU, MAKOTO YASUNAGA, TO ...1974 Volume 23 Issue 1 Pages 32-38
Published: March 01, 1974
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSThe relations between the power output during exercise and its maximal duration have been investigated on three young male subjects throughout the performance of heavy constant loaded cycling exercises with different intensities, all of which lead to exhaustion during the period from about 20 seconds to about 100 minutes.
The Aerobic Power output (mean total oxygen intake during exercise) develops rapidly with the increase of the maximal duration of exercise amounting to a few minutes in every case, and then, levels off approximately in one case, but declines steadily in the other cases.
The Anaerobic Power output (oxygen debt per endurance time of exercise) decreases rapidly with the increase of the maximal duration of exercise amounting to about 5 minutes, and then decreases slowly.
The relation between the Total Power output (sum of the Aerobic Power output plus the Anaerobic Power output) and its maximal duration is summarized as the two equations : log P = a - b logt, in the case of the t shorter than about 5 minutes, and log P =a′ - b′log t, in the case of the t longer than about 5 minutes. Here, P is the Total Power, tis the maximal duration, and a, b, a′ and b′ are constants. In each subject, the values of the constants a and b respectively. are greater than the a′ and b′
The present investigation was supported by a Grant in Aid for the Miscellaneous Scientific Research from the Ministry of Education.View full abstractDownload PDF (809K) -
MITSUTSUGU ONO, AKIHITO YANAGIMOTO1974 Volume 23 Issue 1 Pages 39-44
Published: March 01, 1974
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSThe physical fitness of four well trained female on “Kendo” were tested and the results were as follows.
1) The grip strength grading ability of the subject was excellent than that of untrained female.
2) The reaction time was prolonged at the menstrual flow stage.
3) The grip strength and their grading ability were not influenced by the ovarial cycle.
4) The grip strength grading ability wasn't drop even if the test has been done immediately after the heavy Kendo training.View full abstractDownload PDF (593K) -
1974 Volume 23 Issue 1 Pages 48-51
Published: March 01, 1974
Released on J-STAGE: September 30, 2010
JOURNAL FREE ACCESSDownload PDF (599K)
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