著者

本間 幸子 伊藤 昭治 古藤 高良 池上 晴夫

出版者

一般社団法人日本体力医学会

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.41, no.1, pp.98-107, 1992-02-01 (Released:2010-09-30)

参考文献数

23

被引用文献数

2 6

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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.

著者

福岡 義之 近藤 徳彦 後藤 真二 池上 晴夫

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.40, no.1, pp.60-73, 1991-02-01

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Amplitude and phase response of ventilation (V_E), carbon dioxide output (VCO_2) and oxygen uptake (VO_2) during sinusoidally varying work load for periods (T) of 1〜16 min were studied in six healthy men. The relationships between these parameters and aerobic capacity (VO_2max, ATVO_2) were also examined.The results and conclusions obtained were as follows : (1)The relationship between the period (T) of exercise and amplitude response of VO_2,VCO_2 and V_E was well described by first-order exponential models.However,the relationship between the period of exercise and the phase shift (phase responses of VO_2,VCO_2,and V_E) was better described by complex models comprising a first-order exponential function and a linear equation.This can be explained by Karpman's threshold theory.(2)High negative correlations were observed between the steady-state amplitude (A) of phase response or the time constants (〓) of amplitude response and VO_2max,and ATVO_2.Significantly high negative correlations for all gas exchange parameters may be more rapid in individuals with greater aerobic capacity.(3)A close relationship between the response of VCO_2 and V_E was demonstrated by a higher correlation coefficient than that between VO_2 and VCO_2 or between VO_2 and V_E.This call be partly,but not completely,explained by the cardiodynamic theory.

著者

藤原 勝夫 池上 晴夫 岡田 守彦 小山 吉明

出版者

The Anthropological Society of Nippon

雑誌

人類學雜誌 (ISSN:00035505)

巻号頁・発行日

vol.90, no.4, pp.385-399, 1982 (Released:2008-02-26)

参考文献数

27

被引用文献数

21 19

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重心計上にて種々の立位姿勢を保持させ,立位姿勢の安定性の加齢に伴う変化について調べるとともに,下肢筋力(底屈力,背屈力,母指屈曲力)を測定し,立位姿勢の安定性と下肢筋力との関係について検討した。その結果,安楽立位および前傾姿勢の安定性は60歳代以上において低下するのに対し,後傾姿勢の安定性は30歳代で低下しはじめることが明らかとなった。それぞれの姿勢に関与する筋力の加齢に伴う変化の様相は安定性の変化と類似していた。また筋力と安定性との相関からみて,前傾•後傾のような比較的大きな筋力を必要とする姿勢では,安定性の規定要因として筋力の重要性が増大すると考えられた。

著者

西保 岳 後藤 真二 鍋倉 賢治 池上 晴夫

出版者

日本体力医学会

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.36, no.4, pp.195-201, 1987

被引用文献数

2

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The purpose of this study was to investigate the effects of contraction force and the pooled blood volume in the calf on the pumping action of calf muscle contraction. Calf blood volume was controlled by lower body negative pressure (LBNP) and isometric contraction of calf extensor muscle was performed using a handmade dynamometer in recumbent position. The relative volume changes (&Delta;V/V%) of calf were determined using rubber straingage, when isometric contractions (5, 10, 20, 40 and 60 kg) of the calf muscle were repeated under LBNP of 0, -20, -40, and -60 mmHg.<BR>During resting condition, &Delta; V/V was increased by 1.04% under -20 mmHg LBNP, 1.88% under -40 mmHg, and 2.54% under -60 mmHg. These increases of &Delta;V/V were due to the increased blood pooling in the calf. It was shown that the increased blood volume was almost expelled by several bouts of muscle contractions of proper force. The optimum force of contractions for expelling pooled blood was 20 kg under -20mmHg LBNP, and 40 kg under -40 and -60 mmHg LBNP. And it was apparent that the effectiveness of muscle pump was accumulated with repeating contractions, arriving to a plateau after several bouts.<BR>It was shown that the effect of muscle pump in the given contraction force was more effective under the condition with more amount of blood contained in the calf, but the muscle pumping action by light contraction forces couldn't overcome the effect of severe LBNP.

著者

西保 岳 姜 熙成 池上 晴夫

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.34, no.5, pp.284-293, 1985-10-01 (Released:2010-09-30)

参考文献数

34

被引用文献数

1 1

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The purpose of this investigation is to evaluate the effects of muscle pump by pedaling exercise on blood circulation and define its properties. Lower body pressurization device equipped with bicycle ergometer was used to provide negative pressure on the lower body of subjects in recumbent position. Seven healthy male collage students volunteered for subjects.Whole experiment for each subjects was divided into control stage (0 mmHg), -20, -40, and -60 mmHg LBNP (lower body negative pressure) stage. Preceeded by resting period, 25, 75, and 125 W exercise in experiment 1, 50 and 100 W exercise in experiment 2 were loaded using bicycle ergometer with revolution of 60 rpm during each stage. Following parameters were determined: HR, SV, Q, and blood pressure.The results obtained were as follows;(1) In resting condition, LBNP caused significant decrease in SV and Q in spite of marked compensatory increase in HR.(2) These effects of LBNP were cancelled in -20 mmHg or mostly cancelled in -40 and -60 mmHg by pedaling exercise of 50 W or more.(3) Effect of muscle pump by pedaling exercise is apparent in light exercise such as 25 or 50 W arriving to a plateau with more intensive load.(4) Muscle pump action by the same exercise condition is more effective under more severe LBNP.(5) Light exercise in LBNP caused decrease in HR, probably because of pressure reflex initiated by restoration of blood pressure.These results leed us to a conclusion that light pedaling exercise produces a powerful pumping action nearly enough to compensate the circulatory disturbance by strong LBNP.

著者

西保 岳 池上 晴夫

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.34, no.3, pp.167-175, 1985-06-01 (Released:2010-09-30)

参考文献数

27

被引用文献数

2 1

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The purpose of this study is to evaluate the effects of muscle pump of pedaling exercise on blood circulation. Lower body pressurization device was used to provide negative pressure and positive pressure on the lower body of subjects in recumbent position. This device is also equipped with bicycle ergometer in it. Five healthy male college students volunteered for subjects.Whole experiment for each subject was divided into pre-control stage (0 mmHg), LBPP (lower body positive pressure) stage (+40mmHg), LBNP (lower body negative pressure) stage (-40 mmHg) and post-control stage (0 mrHg) . 50 (watt) exercise and 100 (watt) exercise preceded by resting period were loaded during each stage and following parameters were determined: ECG, phonocardiogram, carotic pulse wave, VO2, cardiac output, and blood pressure. Pre-ejection period index (PEPi), Left ventricular ejection time index (LVETi), PEP/LVET and stroke volume (SV) were calculated from the recorded data.Results suggested following conclusions:1) In rest condition, LBNP caused marked increase in HR, PEPi, and PEP/LVET and remarkable decrease in Q, SV, and LVETi. These findings indicate that LBNP affects venous return and exaggerates venous pooling in lower body.2) It was shown that muscle pump of pedaling exercise counteracts the effects of LBNP and the findings mentioned above were largely abolished by pedaling exercise of 100 (watt) .3) LBPP caused no apparent change in the studied parameters except blood pressure. Blood pressure increased by LBPP probably because of rising in total peripheral resistance.

著者

曽根 涼子 山崎 文夫 藤井 宣晴 鍋倉 賢治 池上 晴夫

出版者

The Japanese Society of Physical Fitness and Sports Medicine

雑誌

体力科学 (ISSN:0039906X)

巻号頁・発行日

vol.42, no.5, pp.465-474, 1993-10-01 (Released:2010-09-30)

参考文献数

29

被引用文献数

1

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激運動後における迷走神経活動の回復過程を呼吸性心周期変動の大きさの変化から検討することおよび呼吸性心周期変動の位相の変化を明らかにし1その変化の発生機構について検討することを目的として, 健康な男子大学生6名を被検者としてトレッドミルによるexhaustive走を行なわせ, 心周期および血圧の呼吸性変動の大きさおよび位相の変化を運動後5時間にわたって追跡調査した.呼吸周期および一回換気量は, それぞれ全測定を通して6秒および21に規制した.1) 呼吸性心周期変動の大きさはexhaustive走によって著しく減少するが, 運動後約2時間で前値に復した.呼吸運動を基準とした呼吸性心周期変動の位相は運動によって有意に遅れた.そして運動後2時間は急速に, それ以後は徐々に回復する傾向を示した.2) 呼吸性SBPの大きさおよび位相には運動後に顕著な変化は認められなかった.以上の結果から, 激運動によって抑制された迷走神経活動は運動終了から約2時間で回復すると考えられる.また, 運動後には呼吸性心周期変動の位相は明らかに遅れた.これは迷走神経の活動度の低下を反映している可能性がある.

著者

藤原 勝夫 池上 晴夫 岡田 守彦

出版者

筑波大学体育科学系

雑誌

筑波大学体育科学系紀要 (ISSN:03867129)

巻号頁・発行日

no.8, pp.p165-171, 1985-03

被引用文献数

6