- 著者
- 弘 卓三 石井 哲次 冨岡 徹 森田 恭光 山本 鉄雄
- 出版者
- 日本体力医学会
- 雑誌
- 体力科學 (ISSN:0039906X)
- 巻号頁・発行日
- vol.46, no.5, pp.445-451, 1997-10-01
- 参考文献数
- 28
- 被引用文献数
- 1
We have developed a mouth guard which has revolutionized the shape and material of the conventional mouth piece. The H shape mouth guard has the unique shape like that of an H. Even with the new shape of the mouth piece it does not hinder the performance of the wearer. The following are the fundamental data collected by our group. In this study we examined its influences on leg power, the carry(the distance a golf ball is hit)and the motion of the club head during a tee off. The results are as follows : 1) By wearing or setting the mouth guard, the variation of leg power, measured with a Sybex II, showed an increase at selected angular verocity. The rate of increase averaged aproximately 15%. 2) The amount of work in anaerodush, an intensive, but short exercise, increased significantly by 1.25 seconds. 3) As for golf, all four of the test subjects joint performance increased their carries by 5.2 to 11.6 yards, using a 1 st wood. 4) Also the fluctuation of the head of the club decreased from 7.3 cm to 3.6 cm on average. Our group have found that the new H shaped mouth guard can absorb shock as well as not hinder the performance of the individual who is wearing it. Thus, the H shape mouth guard can be worn durinlg sports to enhance the participant's performance.
2 0 0 0 OA 439.スキーブーツの調整がスキー動作におよぼす影響(バイオメカニクス)
2 0 0 0 OA 183.神奈川大学箱根駅伝チームのLTトレーニング
- 著者
- 石井 哲次 大後 栄治 植田 三夫 上條 清美 泉 圭祐 弘 卓三
- 出版者
- 一般社団法人 日本体育学会
- 雑誌
- 日本体育学会大会号 第49回(1998) (ISSN:24330183)
- 巻号頁・発行日
- pp.306, 1998-08-20 (Released:2017-08-25)
1 0 0 0 OA 代謝性acidosisによる赤血球浸透圧脆弱性の研究
By severe physical training, it is confirmed that the destruction of erythrocytes in a trainee happens within one week from the starting point. This destruction of erythrocytes is characterized by the increase in osmotic fragility of erythrocytes to a hypotonic salt solution.<BR>The purpose of this study is to clarify the mechanisms of the increase in osmotic fragility of erythrocytes. The subjects were divided into two groups, athletes and non-athletes, and they were loaded by a treadmill running during three minutes, with speeds from 200 to 250 meters per minutes.<BR>The osmotic fragility of erythrocytes was determined by the Coil Planet Centrifuge System. The measurement of the lactic acid was made by the end point method and the lipid patterns were analyzed, using a flame ionization detector (thinchrograpy) .<BR>The results obtained are as follows<BR>1) After the exercise, the concentration of blood lactate markedly increased and attained to the level of 90mg/% in average.<BR>2) The osmotic fragility of erythrocytes increased in parallel with the elevation of lactate content in the blood.<BR>3) The osmotic fragility of erythrocytes was significantly related with the lactate content (r=0.52, p<0.001), the regression equation of the lactate content (X) and the osmotic fragility of erythrocytes (Y) was : Y=0.05x+95.1.<BR>4) After the exercise, the contents of free cholesterol and total phospholipid in the red blood cell markedly decreased in comparison with that before exercise.<BR>5) The osmotic fragility of erythrocytes was significantly related to the content of free cholesterol in the red blood cell (r= -0.45, p<0.02) .<BR>In conclusion, lactic acid may contribute to modify the lipid in the red blood cell and to increase the fragility of the erythrocytes.
