巻号一覧
17 巻, 1 号
選択された号の論文の3件中1～3を表示しています
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小野 三嗣, 尾谷 良行, 高橋 泰光, 坪田 修三, 倉田 博1968 年 17 巻 1 号 p. 1-13
発行日: 1968/03/01
公開日: 2010/09/30
ジャーナル フリー剣道5段2名, 3段3名, 初段2名, 無段 (経験約1年) 3名, 剣道は全く無経験であるが他のスポーツには習熟しているもの4名を対象として, 木刀, 竹片, 竹刀によるストレーンゲージ打撃を行わせた。その時の張力並びに微分曲線を陰極線オッシログラフ並びにペン書きオッシログラフに記録し, 大要次の如き結果を得た。
1) 剣道熟練者はその静的筋力を打撃力に転換する率が高い。また張力発生の傾斜も鋭いため, 衝撃エネルギーとして考える時, 未熟練者よりも遥かに大きな値を示す。
2) 熟練者は打撃に際して上腕三頭筋を有効に使用し, しかもその瞬間に上腕二頭筋は充分に弛緩させている。未熟練者では上腕二頭筋と三頭筋が同時に収縮することが珍しくない。
3) 熟練者は同じ動作のくりかえし, 或いは用具の変更によって, 筋放電パターンに大きな差異を生じることはないが, 未熟練者では変動が大きい。
尚シンクロナイズ装置付電子ストップウオッチを用い, 四肢のそれぞれ二肢を同時に動作しようとする場合の時差を測定した。
剣道選手に特有と思われる所見は発見できなかった。抄録全体を表示PDF形式でダウンロード (14484K) -
塚越 克己, 加賀谷 〓彦, 雨宮 輝也, 黒田 善雄1968 年 17 巻 1 号 p. 14-27
発行日: 1968/03/01
公開日: 2010/09/30
ジャーナル フリーThe effects of the inner diameter of respiratory valve on the pulmonary ventilation and oxygen uptake were studyed.
Five healthy male subjects were asked to run on a treadmill with 8.6% slope. Each subject equiped a respiratory valve with five kinds of diameter (19mm, 24mm, 30mm, 34mm and two valves of 19mm) performed all-out running at a given speed at which he could run about 6 minutes. In all experiments, the inner diameter of the connective tubes in valve, stop cock and bag were 30mm. From the experiment, following results were obtained ; up to diameter of 30mm the larger the diameter of valve, the higher became the pulmonaly ventilation, accompanied with the increasing oxygen uptake. However, a large diameter of 34 mm did not produce further increase in ventilation. The difference in ventilation between 19mm and 30mm was found in such an intensive work that demanded over 5011/min. of ventilation and it increased related to the increment of work intensity.
It is concluded that in studying the respiratory function during severe work, it is better to use respiratory valve as large as 30mm in diameter.抄録全体を表示PDF形式でダウンロード (3620K) -
池上 晴夫, 山崎 由久, 榊原 千恵子1968 年 17 巻 1 号 p. 28-34
発行日: 1968/03/01
公開日: 2010/09/30
ジャーナル フリーIn order to compare the work efficiency in hypoxia with that in normal environment, given work was loaded to five healthy male subjects in a decompression chamber. Hyoxia was induced by decompression to a simulated altitude of 4, 000 meter, where the subjects walked on a treadmill with a slope of 5% at a speed of 80 m/min for 10 minutes. Oxygen consumption, expiratory volume, R. Q., respiratory rate, heart rate, oxygen pulse, and oxygen removal were measured before, during and after the work. Blood samples were taken to determine lactate value before and after the work. The results obtained and the conclusion are as follows ;
1) Vo2 at rest in the hypoxia was slightly less than that of the control, while the total oxygen consumed by the work was more in the hypoxia than the control value.
2) Making correction for anaerobic mechanism, effect of respiratory and circulatory acceleration, and decreased air density on oxygen consumption revieled that the true work efficiency in hypoxia was completely same as in the controle.
3) Respiratory quotient dropped in the early stage of the work, thereafter increased in the control, while it increased on work without initial drop in the hypoxia. Total extra CO2 eliminated by the work was significantly more than the control value.抄録全体を表示PDF形式でダウンロード (783K)
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