漸進的筋弛緩法の習得過程におけるリラックス反応の経時変化

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  • ゼンシンテキ キン シカンホウ ノ シュウトク カテイ ニ オケル リラックス ハンノウ ノ ケイジ ヘンカ
  • Time Course Changes in Intensity of the Relaxation Response on Learning Process of the Progressive Muscle Relaxation
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本研究は漸進的筋弛緩法(Progressive Muscle Relaxation, 以下PMRと略す)の習得過程におけるリラックス反応強度の変化を経時的に測定し,PMR習得に要する時間とリラックス効果について実験的に検討することを目的とした.

健康な成人学生14名を対象にPMRを1日2回,2週間実施し,心拍変動,血圧,POMSを主な指標として,PMR習得過程におけるPMRのリラックス反応を生理的・心理的の両面から評価した.仰臥位・閉眼で安静状態を一定時間とりつづける実験を「安静」として対照実験とし,それに対しPMRを一定時間実施する介入実験を「PMR」として両者の結果を比較検討した.その結果,1)「安静」,「PMR」とも心拍変動スペクトル解析から求めた副交感神経活動指標の増大が認められ,「PMR」でより大きな増大が認められた.2)「安静」,「PMR」ともに実験実施直後に比して1週間後にはリラックス反応が強くなり,2週間後にも同程度の反応が認められた.3)PMRに対する主観的な感想では,1週間後から2週間後にかけてPMRへ肯定的な感想を示す者が増加し,無反応,否定的な感想を示す者は減少した.

以上の結果から,PMR開始1週間後にはPMRのリラックス効果が明確に現れ,PMRの習得は1週間でなし得ることが示された.PMRに対する主観的な肯定感は1週間後のみならず2週間後にもさらに増強し,PMRの反復継続によりリラックス感が高まることが示された.

The purpose of this study was to evaluate the physiological and psychological effects on the learning process of progressive muscle relaxation (PMR). The effects were evaluated by heart rate variability, blood pressure and POMS (Profile of Mood States). Intervention experiment in which PMR was practiced in the fixed time was carried out for two weeks (named "PMR"). As a control experiment (named "REST") which kept taking the bed rest in supine position and closing eyes in fixed time was also made.

In "PMR" and "REST", there was a increase of vagus nerve activity calculated by the spectrum analysis of hear rate variability, and larger increase was observed in "PMR". The relaxation response mounted up both in "REST" and in "PMR" compared with the immediately after the beginning of the PMR practice and after one week, and after two weeks almost the same response was observed. In the subjective impression, the number of the person who expressed the affirmative impression to PMR increased from after one week to after two weeks and that who showed no response or negative impression decreased.

The relaxation effect of PMR appeared clearly after one week. Therefore, the mastery of PMR could be made for one week. The subjective affirmation for PMR was sensed after one week and more sensed after two weeks, and so the iterative continuation of PMR might heighten the subjective relaxation feelings.

source:Journal of School of Nursing, Chiba University

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