体力科学
Online ISSN : 1881-4751
Print ISSN : 0039-906X
ISSN-L : 0039-906X
39 巻 , 1 号
選択された号の論文の8件中1~8を表示しています
  • 1990 年 39 巻 1 号 p. 1-43
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
  • 外山 寛, 藤原 勝夫
    1990 年 39 巻 1 号 p. 44-52
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
    The voluntary exercises consist of different automatized levels and are mostly a combination of the upper limbs and the lower limbs exercises.
    This study was to examine the interference of the upper limbs exercise to the periodic lower limbs exercise with different automatized levels. Seven male university students, aged 19 and 20 yrs., served as subjects. The periodic lower limbs exercises were the stepping (walking on the place) and the alternate plantar-flexion of the right and left foot while standing. The frequencies of the lower limbs exercises were 120, 160 and 200 times/min, The stepping, which is similar to the motion of the lower limbs in walking or running, may be performed more frequently in daily life than the plantar-flexion in which only the ankle angle was changed. Therefore, we assume that the stepping is a higly automatized exercise compared with the plantar-flexion. Upper limbs exercise, which was combined with the lower limbs exercise, was the simultaneous tapping of one time by both hand. The interference degree was evaluated by the change of step intervals of the lower limbs exercise. The results were:
    1) The fluctuation of step intervals on the plantar-flexion was greater than the fluctuation on the stepping and the smallest in the frequency 120 compared with that in the other frequencies.
    2) When the tapping was combined with the lower limbs exercises, one step interval at that time was lengthened and one step interval immediately before the tapping was shortened. This change of step intervals was greater in the plantar-flexion than that in the stepping. The change in the plantar-flexion was the smallest in the frequency 120 compared with that in the other frequencies.
    The above mentioned findings suggest that the automatized level of the lower limbs exercise can be clearly evaluated by the interference degree of the upper limbs exercise to the periodic lower limbs exercise.
  • SHUICHI KOMIYA, TAKUJI MASUDA
    1990 年 39 巻 1 号 p. 53-59
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
    A new method for estimation of total body water in human subjects by measurement of bioelectrical impedance is described. Determinations of impedance (Z) were made in 24 healthy women aged 35.9±15.39 yr using an electrical impedance analyzer (T-1988 K, Toyo Physical Inc.) with a four-electrode arrangement that delivers a painless signal (500 μA at 50 kHz) into the body. The mean coefficient of variation for ten impedance measurements in 4 male subsamples was 0.8% (range, 0.2-1.2%) . Total body water determined by deuteriumdilution was 26.1±2.44l. The estimation equation was developed by regression analysis of data from 24 women. Height2/resistive impedance was the most significant variable for prediction of deuterium-dilution space (TBW) and yielded r=0.804 (p<0.001) with a SE of estimate= 1.41l. The regression equation generated was Total Body Water=0.5294 (Ht2/Z) + 2.5139. These data indicate that bioelectrical impedance measurement is a reliable and valid approach for the estimation of total body water in human subjects. This noninvasive method, which is safe, simple, rapid and convenient, should prove useful in a clinical setting, and also for epidemiological and exercise physiology studies.
  • 鈴木 茂廣, 鞆田 幸徳, 宮永 豊, 高橋 伍郎, 坂田 勇夫, 白木 仁
    1990 年 39 巻 1 号 p. 60-68
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
    A study was conducted to investigate the influence on the shoulder joint of throwing during water polo. One hundred sixty-seven water polo players were interviewed about injuries caused by water polo, and 70 players claimed to have had shoulder pain.
    In 21 players, clinical examinations were performed, and in 31 players, assessment of external rotation stability was made. Then three-dimensional analysis of hand-to-hand shoot motion was performed in 7 players.
    The results were as follows;
    1. The painful phases of the throwing motion were the take-back phase and the acceleration phase, the pain being present at the anterior and lateral portions of the shoulder joint,
    2. Assessment of stability revealed that the external rotation displacement on the affected side was significantly larger than that on the control side in the injured players.
    3. Analysis of hand-to-hand shoot motion revealed that the external rotation angle in the acceleration phase was significantly larger in non-injured subjects than in the injured.
    4. The external rotation angle after ball contact was increased in the injured, but decreased in the non-injured.
    5. To prevent injury, it appears important to catch and throw the ball using the upper extremity and rotation of the trunk in a high body position in the water, and to strengthen the muscles of the shoulder.
  • 平木場 浩二, 丸山 敦夫, 美坂 幸治
    1990 年 39 巻 1 号 p. 69-77
    発行日: 1990/02/01
    公開日: 2010/12/10
    ジャーナル フリー
    本研究の目的は, CO2過剰排出量 (CO2excess) と持久性能力の関連性を明らかにするために, 長距離走者と一般人の乳酸蓄積の結果生じるCO2excessを比較するとともに, CO2excessと持久性パフォーマンスとの関係について検討することであった.18才から22才の男子長距離走者6名 (LDR群) および21才から24才の健康な一般成人男子4名 (CON群) を対象とし, 自転車エルゴメーターでの負荷漸増法による最大下および最大運動テストと12分間全力走を実施して, それらの運動テストで得られたVO2max, VO2AT, CO2excessおよび12分間全力走パフォーマンスとの関係を検討した.本研究で得られた結果の要約は以下の通りである.
    1) CO2excess (ml) は, LDR群3, 442±677ml, CON群2, 677±437mlの値であったが, 両群間に有意な差はなかった.体重当りに換算したCO2excess/w (ml・kg-1) は, CON群 (40.3±3.54) と比較して, LDR群 (59.1±9.07) が有意に高い値を示した (p<0.01) .
    2) ΔLA (安静から運動直後1分目までの血中LAの増加分) に対するCO2excess/wの比率 (CO2excess/w/ΔLA) は, LDR群 (5.59±1.16ml・kg-1・mmol-1) がCON群 (4.46±0.69ml・kg-1・mmol-1) より高値を示す傾向にはあったが, 両群間に有意な差は認められなかった.
    3) CO2excess (ml) は, VO2maxとは有意に相関しなかったが, VO2ATとは有意に相関していた (r=0.763, p<0.05) .体重当りに換算したCO2excess/w (ml・kg-1) とVO2maxおよびVO2ATとの間にはそれぞれr=0.822 (p<0.01) , r=0.892 (p<0.001) の高い有意の相関係数が認められ, 体重当りのCO2excess (ml・kg-1) と持久性能力との間に関連性のあることが確認された.さらに, ΔHCO3- (安静から運動直後1分目までの血中HCO3-の減少分) とも有意の相関関係が認められた (r=0.649, p<0.05) .
    4) 持久性パフォーマンスの指標として採用した12分間全力走の走行距離とCO2excess (ml) およびCO2excess/w (ml・kg-1) との間にはそれぞれr=0.715 (p<0.05) , r=0.933 (p<0.001) の有意な相関関係が得られ, CO2excessの相対値 (ml・kg-1) の方が持久性パフォーマンスと密接に関連することが認められた.また, CO2excess/w/ΔLAの比率との間にも有意な相関のあることが示された (r=0.671, p<0.05) .
    5) 以上の結果から, 体重当りのCO2excess (ml・kg-1) およびCO2excess/w/ΔLAの比率には持久性能力と関連性があり, 乳酸蓄積を伴う比較的高強度の身体活動の維持が要求される持久性競技 (例えば, 3, 000~5, 000M走) のパフオーマンスを評価する上で重要な因子となることが示唆された.
  • 1990 年 39 巻 1 号 p. 78-81
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
  • 1990 年 39 巻 1 号 p. 81-87
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
  • 1990 年 39 巻 1 号 p. 87-90
    発行日: 1990/02/01
    公開日: 2010/09/30
    ジャーナル フリー
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