巻号一覧
41 巻, 1 号
選択された号の論文の11件中1～11を表示しています
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1992 年 41 巻 1 号 p. 1-62
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーPDF形式でダウンロード (7357K) -
松永 智, 佐渡山 亜兵, 中村 友浩, 勝田 茂1992 年 41 巻 1 号 p. 63-69
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーTo investigate whether muscle fiber conduction velocity reflects muscle fiber type, we studied the extensor digitorum longus (EDL) and soleus (SOL) muscle in 7 male rats aged 12 weeks. Muscle fiber conduction velocity was measured with a surface electrode array during stimulated contraction and calculated from the delay between two action potentials along muscle fibers for a given inter-electrode distance. Conduction velocity in the EDL (2.71±0.50 m/s) was significantly higher (p<0.05) than that in the SOL (2.14±0.34 m/s) . Fiber type, fiber area and fiber diameter were determinated by myosin ATPase staining and NADH-tetrazolium reductase staining. Muscle fiber composition of the EDL and SOL was 94.6±1.8 and 14.8±4.3% FT fibers, respectively, and mean muscle fiber diameter was 62.7±6.2 pm and 79.2±7.8pm, respectively, that of the EDL being significantly smaller (p<0.01) than that of the SOL. It was suggested that individual differences in conduction velocity were caused by differences in muscle fiber composition rather than differences in muscle diameter.抄録全体を表示PDF形式でダウンロード (739K) -
今村 裕行, 松原 末佐, 皆吉 正博, 今井 優, 国方 和宏, 中村 伸, 小畑 大吉, 森井 博之1992 年 41 巻 1 号 p. 70-78
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリー飲酒, 喫煙習慣を有さない17～68歳の女性250名を対象として, 女性の体脂肪率による肥満判定基準について, 体脂肪率と医学的検査項目との関係から, 年齢とVO2max/wtの影響を消去して検討した結果, 以下のような知見を得た.
1) 偏相関において年齢とVO2max/wtの影響を消去しても体脂肪率と有意な相関関係を示した項目について, 対境界値に相当する体脂肪率を求めたところ, それらの値は30.7～36.4%に分布していた.
2) 体脂肪率を30%から35%まで, どこで区切っても以上群の医学的検査項目の異常値の出現率は未満群に比較して有意に高率であった.
3) 被検者をN, MO, 0の3群に分けて比較したところ, O群はN, MO群に比較して医学的検査項目の異常値の出現率において有意な高率を示し, DBPの平均値においてもそれぞれ有意な高値を示した.またO群はN群に比較して, HDL-Cにおいて有意な低値を示し, 逆にTC/HDL-C, UA, GOT, GPT, SBP, FBSにおいて有意な高値を示した.N, MO群を平均値で比較すると, MO群はHDL-Cにおいて有意な低値を示し, 逆にTC/HDL-C, UA, β-Lにおいて有意な高値を示した.以上の結果から, 女性の場合, こまれまで本邦において広く用いられてきた肥満の判定基準を超えると, 医学的検査値が悪化することが分かった.また運動指導や栄養指導を行う際には, 体脂肪率と有酸素性能力を総合的に判定することが望ましいと思われた.抄録全体を表示PDF形式でダウンロード (1032K) -
春日井 淳夫, 小笠原 正志, 吉見 浩二, 伊藤 朗1992 年 41 巻 1 号 p. 79-88
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーIn order to prevent sports anemia, caused especially by iron deficiency or shortage, a special type of food supplementation was designed. This was called“iron-food”and contained 510% of the therapeutic iron dose. According to hemoglobin (Hb) values, female subjects who had been performing hard daily training were divided into two groups ; an anemia group (A group, Hb≤11.9 g/dl, n=4) and a potential anemia group (PA group, 12.0≤Hb≤12.9g/dl, n=4) . Then the iron-food was administered for six weeks following placebo treatment. Iron status, hematological profiles and aerobic work capacity of the two groups were examined before and after the two periods to investigate the effect of the iron-food. Serum iron, iron saturation and ferritin were significantly increased in the PA group. Serum iron tended to be increased in the A group, but not significantly. Red blood cell count, Hb and hematocrit were significantly increased in the PA group, and the reticulocyte count was also increased in the A group. These results suggest that iron-food helped to increase daily iron intake in the anemic subjects, but not to a sufficient extent to aid recovery from anemia. However the ironfood was effective for improving iron status in subjects with potential anemia (latent iron deficiency) .抄録全体を表示PDF形式でダウンロード (1182K) -
芳田 哲也1992 年 41 巻 1 号 p. 89-97
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーA study was couducted to determine the changes in urinary 3-methylhistidine (3-ME), urea-nitrogen (Urea-N) and creatinine (CR) in the initial period of weight training. The urinary excretion of 3-ME, Urea-N and CR over a 24-h period in nine human subjects was determined before and during (at one-day intervals) a weight training period of 11 days. Two periods of weight training at different work intensities were performed; experiment A (Exp. A) : three sets of 8 repetitions at 60% of maximal voluntary contraction (MVC) ; experiment B (Exp. B) : one set of 48 repetitions at 30% of MVC. Subjects in both Exp. A and Exp. B performed five kinds of weight lifting exercise (hyper extension, sit-up, bench press, leg curl, leg extension) every day during the weight training period.
The main results obtained were as follows;
1) Urine volume and urinary CR showed no clear changes in either Exp. A or Exp. B.
2) In Exp. A, urinary 3-ME increased significantly, and Urea-N tended to decrease during the weight training period. On the other hand in Exp. B, urinary Urea-N tended to increase, but the fluctuation of urinary 3-ME showed no clear tendency during the weight training period.
3) After the weight training period, girth of the chest, upper arm and thigh tended to be increased after Exp. A in comparison with those before the weight training period.
These results suggest that whole-body protein catabolism in the initial period of weight training is dependent on the aim and type of weight training.抄録全体を表示PDF形式でダウンロード (1082K) -
本間 幸子, 伊藤 昭治, 古藤 高良, 池上 晴夫1992 年 41 巻 1 号 p. 98-107
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリー加速度脈波と血圧の関係および加速度脈波の各波の生理的な意義を明らかにすることを目的として, 男子学生5名を対象に, 上腕圧迫によって末稍血流が変化する際の指尖容積脈波, その二次微分波および指動脈圧波をbeat-by-beatに測定した.得られた結果は以下の通りであった.
1.収縮期血圧の上昇によって加速度脈波のa波は上昇し, bおよびe波は下降するのに対して, 拡張期血圧の増大によってa波は下降し, bおよびe波は上昇する傾向にあった.また加速度脈波は細動脈弾性率によっても大きな影響を受け, 弾性率がノ1丶さいほどa波は上昇し, bおよびe波は下降する傾向にあった.
2.加速度脈波のcおよびd波は収縮期血圧の上昇によって下降し, 拡張期血圧および細動脈弾性率の増大によって上昇する傾向があるが, それらの3要因では十分に説明できず, ほかに影響をおよぼす要因の存在が示唆された.
3.収縮期血圧が上昇する場合でも, それが血流量の増加に起因する場合には加速度脈波の波形パターンはG→Aに変化するのに対し, それが末梢抵抗の増加に起因する場合にはA→Gに変化するものと考えられた.
これらの結果から加速度脈波と血圧の関係は単純でなく, 血圧構成因子である血流量や末梢抵抗によって大きく影響される.したがって加速度脈波と血圧を併せて測定することが末稍循環状態をより正しく評価する上で有効であると考えられる.抄録全体を表示PDF形式でダウンロード (1076K) -
寺沢 宏次, 藤原 孝之, 柳沢 健, 酒井 秋男, 上田 五雨1992 年 41 巻 1 号 p. 108-116
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーA study was conducted to investigate muscle fatigue during isometric contraction of the indicis proprius using EMG analysis (BIMUTAS Ver. 2. 1) .
The subjects were 8 healthy men (ranging in age from 19 to 42 years) .
Plummets (ranging from 300g to 600g) were placed on the distal knuckle of the index finger to create loads on the indicis proprius muscle. EMG was recorded until the plummet dropped, and the total time required was divided into 10 equal parts. In each part, the EMG record for the first 1000 ms was picked out. Then the mean power frequency (MePF) and median power frequency (MdPF) of the power spectrum were calculated.
The results were as follows:
1) Both MePF and MdPF showed shits to lower frequency bands.
2) Integrated values of the EMG power spectrum increased with time.
3) The time courses of the MePF and MdPF in each EMG sample for the 8 subjects were determined by the 3-point moving average method.
A break-point was observed in each MePF and MdPF diagram.
It was considered that two-break points observed in the time courses of the EMG record were valid as an objective index of local muscle fatigue.抄録全体を表示PDF形式でダウンロード (875K) -
斉藤 満, 間野 忠明1992 年 41 巻 1 号 p. 117-123
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーA study was conducted to determine whether anticipation of exercise alters the responses of sympathetic nerve activity to muscle contraction. Sympathetic nerve activity leading to the skin (SSA) and muscle (MSA) was recorded from the tibial nerve in the left and right legs using tungsten microelectrodes. Heart rate and blood pressure (oscillometric method) were also measured during the experiment. Seven healthy subjects, who gave informed consent, participated in the experiment. They were asked to exert a static handgrip (SHG) for 2 min at a tension of 30% of maximal voluntary handgrip. Two different situations were set before the commencement of exercise. One was that after several minutes of controlled rest, a countdown was started 2 min before the exercise, and then the handgrip was applied (Cond. 1) . The other was that a preparation time of between 7 and 5 min was set prior to the handgrip exercise while no information regarding the starting time of exercise was given to the subjects (Cond. 2) . SSA for 30 s just before the exercise was increased in comparison with the control value at rest in Cond. 1, but not in Cond. 2. There was no difference in the SSA response patterns to SHG between the two conditions. Before the commencement of SHG, MSA did not alter from the control value at rest in either condition. The magnitudes of the increase in MSA during SHG were almost identical under both conditions. Heart rate for 30s before SHG in Cond. 1 was increased significantly from the control value, whereas there was no significant change in Cond. 2. The magnitude of the heart rate response to SHG was the same in both conditions. The mean blood pressure showed no significant change before SHG, but increased significantly during SHG in both conditions. The increases in SSA and heart rate prior to the commencement of exercise may be related to the anticipatory response to the exercise, although this response was not significant in MSA. These results confirm that anticipation of exercise increases sympathetic outflow to the skin. This may be advantageous in adapting the body to exercise.抄録全体を表示PDF形式でダウンロード (739K) -
前田 如矢1992 年 41 巻 1 号 p. 124-128
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーPDF形式でダウンロード (693K) -
1992 年 41 巻 1 号 p. 129-136
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーPDF形式でダウンロード (1027K) -
1992 年 41 巻 1 号 p. 137
発行日: 1992/02/01
公開日: 2010/09/30
ジャーナル フリーPDF形式でダウンロード (136K)
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