不同室内绿量对老人压力缓解效益比较研究

Effects of Different Amount of Indoor Greenery on Stress Restoration of the Elderly

已有大量研究证明,接触自然有益于缓解人的身心压力,也已有研究探索过不同绿量对年轻人压力状况的改善效果。然而,尚未有研究探明,究竟何种绿量的对老人压力的缓解最为有效。本研究旨在用随机对照实验的方法,以83位老人为被试,以唾液皮质醇浓度、血压和心率为生理压力测量指标,探索4种不同数量(无绿量、低绿量、中绿量、高绿量)的室内绿色植物对老人的压力缓解效益。研究发现,在本文涉及的4种绿量中,6%和18%的室内绿量对老人压力降低的程度更佳,且老人压力仅在6%绿量房间显著下降,在0%绿量房间反而显著上升。本研究结果可为适老居住环境设计实践提供基于实证的依据。

The benefits of nature on the restoration of the elderly has been well documented by previous studies.There is also increasing research exploring the restoration effect of different amounts of nature on young adults.However,for the elderly,the most effective amount of nature to support stress restoration is still remain unclear.Therefore,we designed an randomized controlled trial that included 83 older adults to examine which one in four levels of green amount(i.e.,without greenery,with low,middle or high-level amount of greenery)is the best for the elderly’s stress reduction.We used salivary cortisol,blood pressure and pulse rate as the measurements.This study found that among the indoor spaces of 4 levels of green amount(the proportion of the green plants in the indoor space:0%,6%,12%,18%),the salivary cortisol level of the elderly decreased the greatest degree in indoor spaces with 6%and 18% green amount.It only dropped significantly in the space with 6% green amount and raised significantly in the space with 0% green amount.The findings provide practical evidence for creating supportive living environment for the elderly that can maximize the restorative effects.