Japanese Journal of Physical Fitness and Sports Medicine
Online ISSN : 1881-4751
Print ISSN : 0039-906X
ISSN-L : 0039-906X
Volume 17, Issue 3
Displaying 1-3 of 3 articles from this issue
  • Makoto Yamato
    1968Volume 17Issue 3 Pages 65-82
    Published: September 01, 1968
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
    The kinesiological characteristics of press, snatch and jerk, the physical strength and the records of the weight-lifters of the first rank in Japan were chronologically investigated and evaluated by taking into consideration the records of weight-lifting in the international athletic meeting. The summary of the results obtained is as follows:
    1) In press of weight-lifting the record got better chronologically, but in movement analysis the remarkable improvement was not observed.
    2) In the beginning of press the velocity change rather increased chronologically. Taking into consideration of the annual change of physical strength and weight-lifting record, there could exist a technical change in press, e.g. they came to have the increased tendency to get supplementary strength in the beginning of press by the under extremities.
    3) The hypothesis that it will be desirable to have higher speed at S.P. point in proportion to increased weight, does not always hold true in snatch.
    4) At 6 events the distance of jumping back varied from 15 to 25 cm in the almost all subjects.
    5) In jerk the acceleration of movement at each point deviated quite a lot, namely, there was found no definite tendency of the acceleration.
    6) Trunk and knee angles slightly increased year by year, which could be considered to be as the result of the technical improvement.
    7) The A.H.J. of trunk angle at S.P. point during clean movement was the biggest in jerk, next in press and then least in snatch, and the velocity at S.P. point was in the reverse order of the relation of that angle.
    8) In muscle strength, pressure of bearing up, side-step, Harvard Step Test, vertical jump, flexibility and Typus Index, a characteristic change could not be observed.
    9) In the total record considerable annual increase was observed and smaller difference among the athletes was found.
    10) In press, jerk and snatch each record was in the following order : 1. press, 2. jerk and 3. snatch. Among those 3 items the increasing ratio of press was the biggest and the others were smaller than that and almost same each other.
    11) Including the records of the international events the lifting marks and the records got pretty better chronologically, and the difference between domestic and foreign records became smaller which meant that the domestic records had come close to the international level.
    12) The each annual increasing ratio of domestic record of those 3 items was slightly larger than previous one, but in foreign records the annual increasing ratio of snatch was observed to be smaller, compared with those of the other two items.
    13) The increasing ratio of the lifting weight per 1 kg body weight was about 104% at minimum and about 113% at maximum, compared with that of 1960's record, and it became larger as the weight class became heavier.
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  • Mitsutsugu Ono, Jouhei Sugiyama, Yoshiro Morishita, Naomichi Yamamoto, ...
    1968Volume 17Issue 3 Pages 83-90
    Published: September 01, 1968
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
    Well-trained Kendo and Judo Champion (10 members respectively) were participated at the physical fitness test program including body height, body weight chest girth, length of arms, length of forearms, girth of upper arms, girth of forearms, girth of thighs, girth of lower legs, back strength, grip strength, vertical jump, side step test, foward flexibility and modified Schwab's test
    Results were as follows.
    1) Significant difference between body height, length of arms, length of forearms, back strength, grip strength, vertical jump, side step test and forward flexibility of Kendo and Judo Champions were not found.
    2) Significant difference between body weight, chest girth, girth of upper arms, girth of forearms, girth of thighs, and girth of lower legs of Kendo and Judo champion were observed.
    3) Difference between right and left of limbs of Judo champions were not recognized, although on Kendo champion size of girth of right and left thigh and lower legs were not changed, nevertheless the girth of right both upper arms and forearms were bigger than those of left, the difference of total surface area of arms obtained with modified Schwab's method was not found between the right and left arm.
    From above-mentioned facts, I had discussed on the training effects of Kendo performance and on the judgment of its effect.
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  • Mitsutsugu Ono, Johei Sugiyama, Yoshiro Morishita, Naomichi Yamamoto, ...
    1968Volume 17Issue 3 Pages 91-101
    Published: September 01, 1968
    Released on J-STAGE: September 30, 2010
    JOURNAL FREE ACCESS
    1290 townswomen aged from 4 to 76 participated in this experiment. All of them were measured on body height, body weight, skinfold (abdomen, back, upperarm) jumping reaction time, grip strength (right and left) timed vital capacity and forward flexibility. Some of them were measured on girth of upper arm, forearm, wrist, lower leg and ankle, chest girth, sitting height, backward flexibility and vertical jump beside above mentioned items.
    Results were as follows.
    1) Skinfold was increased with age. The highest degree of increase was obtained on abdomen, next on back, lowest on upper arm.
    2) After 20 years old, ability of vertical jump was clearly reduced with age, but jumping reaction times were not so decreased.
    3) Maximum vital capacity and timed (one second) vital capacity were decreased mark-edly, but ratio of one second V. C. and chest girth were not change after 20 years old.
    4) After 20 years old no change was found on the girth of forearm but the grip strengthes were reduced strikingly.
    5) Correlation between jumping reaction time and Rohrels's Index were not observed.
    6) On the forward flexibility no change was found with age. No correlation between forward flexibility and skinfold was obtained.
    7) After 20 years old backward flexibility was reduced with age, but among same age group the correlation between skinfold and backward flexibility was observed.
    8) Highest value of body density, fat free mass weight (FFM) and FFM/height body×100 of were obtained in ages from 15 to 17, and after these ages they were reduced with age.
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