Stress-alleviating Effect of a Mixed-herb Tea Produced Primarily from Haskap Berries
| Jazyk: | japonština |
|---|---|
| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | 天使大学紀要 = Bulletin of Tenshi College. 15(1):1-18 |
| Popis: | 【目的】ストレスはメンタルヘルスを損ない生活習慣病のリスクにもなるため、軽減効果のある食品が求められている。ハスカップ果実にハマナス花弁、ローズヒップ果実を混合した新規ミックスハーブ（以下、ＭＨ）茶を創製し、ストレス度が高い中高年女性で単回ならびに連続摂取による軽減効果を生理指標値の変化から検討する。【方法】本研究の主旨を理解し、文書で協力に同意した60 代女性16 名を対象にした。試料のＭＨ茶または対照白湯の単回飲用実験を行い、その後自宅でＭＨ茶（または白湯）を４週間毎夕摂取させた後に、再度飲用実験を行った。計４回の実験に参加した対象者は、ＭＨ茶と白湯の飲用順序を無作為交差法で割付けられた。測定したストレス指標は、①前頭部と頭頂部脳波（国際10-20 法に従いF3、F4、C3、C4 部位の脳電位を記録し周波数解析：部位毎の脳波α 波値と左右差係数値）、②心電図（RR 間隔をMemCalc 解析で求めた自律神経活動度）、③趾根部末梢皮膚温である。ＭＨ茶（白湯）飲用による指標値の変化を反復測定二元配置分散分析で解析した。【結果】脳波α波値の増加はストレス低下に対応するが、ＭＨ茶の単回ならびに連続摂取後の飲用により半数以上の測定部位で増加した。ＭＨ茶連続摂取後には、ストレス軽減に対応するα波左右差係数値増加、心電図R-R 間隔交感神経活動度低下、末梢皮膚温上昇が認められた。【結論】ＭＨ茶連続摂取によって明らかなストレス軽減効果が確認された。 Objective: Stress can adversely affect mental health and increase the risk of lifestyle-related diseases. A food that alleviates stress would therefore be valuable. The objective of this study was to produce a new mixed-herb (MH) tea by combining Haskap berries, Ramanas rose petals, and rose hips, and to investigate the stress-alleviating effect of single and continuous MH tea intake on women in late middle age via changes in physiological index values. This population was chosen because they are known to have high levels of stress.Methods: Participants were 16 women in their 60s. All participants provided written informed consent. A single-intake experiment was performed with the sample MH tea or plain hot water as a control. Subsequently, a continuous-intake experiment was conducted in which participants consumed MH tea or plain hot water at home after dinner for 4 weeks. The subjects, who participated in a total of 4 rounds of experiments, were allocated an intake sequence of MH tea and plain hot water according to a random crossover method. The measured stress indices were as follows: (1) electroencephalogram (EEG) of the frontal and parietal regions (EEG was recorded at the F3, F4, C3, and C4 sites according to the international 10-20 electrode system and its frequency analysis was performed. Alpha wave value at each site and laterality coefficient values were estimated.); (2) electrocardiogram (ECG) (autonomic nervous system activities were determined by frequency analysis of the R-R intervals by the MemCalc method.); and (3) peripheral skin temperature at the bottom of the toenail. The changes in these index values after intake of MH tea or plain hot water were analyzed by repeated two-way analysis of variance.Results: An increase in alpha wave values, which corresponds to a reduction in stress, was observed for almost all measurement sites as a result of single and continuous intake of MH tea. After continuous intake of MH tea, there was an increase in the alpha wave laterality coefficient values, a decrease in sympathetic nervous system activity measured from ECG R-R intervals, and an increase in peripheral skin temperature, all of which correspond to reduced stress.Conclusion: Continuous consumption of MH tea alleviates stress. |
| Databáze: | OpenAIRE |
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