Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Effects of forest therapies on stress, depression, and anxiety levels: A systematic review

Version 1 : Received: 6 September 2023 / Approved: 7 September 2023 / Online: 7 September 2023 (11:37:46 CEST)

A peer-reviewed article of this Preprint also exists.

Paredes-Céspedes, D.M.; Vélez, N.; Parada-López, A.; Toloza-Pérez, Y.G.; Téllez, E.M.; Portilla, C.; González, C.; Blandón, L.; Santacruz, J.C.; Malagón-Rojas, J. The Effects of Nature Exposure Therapies on Stress, Depression, and Anxiety Levels: A Systematic Review. Eur. J. Investig. Health Psychol. Educ. 2024, 14, 609-622. Paredes-Céspedes, D.M.; Vélez, N.; Parada-López, A.; Toloza-Pérez, Y.G.; Téllez, E.M.; Portilla, C.; González, C.; Blandón, L.; Santacruz, J.C.; Malagón-Rojas, J. The Effects of Nature Exposure Therapies on Stress, Depression, and Anxiety Levels: A Systematic Review. Eur. J. Investig. Health Psychol. Educ. 2024, 14, 609-622.

Abstract

Background: The mental state is important in the health/illness process. Including stress, depression and anxiety. Nature immersion therapies have been implemented as a valid method for reducing these disorders. The aim will evaluate the effect of forest intervention therapies on levels of stress, depression, and anxiety. Methods: We searched for randomized clinical trials related to stress, anxiety and depression levels. Risk of bias was assessed according to the guidelines of the Cochrane Handbook for International Systematic Reviews. Results: We identified and synthesized eight publications. Two studies for cortisol showed significant differences between the pre-test and post-test levels in the intervention groups. One study including Natural killer cells, that reported a significant decrease in the intervention group compared to the control group. Two studies used the Stress Response Inventory, indicated a significant reduction in stress levels in the intervention group compared to the control group. Regarding Restorative Out-come Scale, no significant differences were found. Three studies were selected for the evaluation of anxiety and depression levels according to the Positive and Negative Affect Schedule. Four studies used The Profile of Mood States scale; no significant difference was observed. Conclusions: There is limited evidence to recommend forest bathing for reducing these disorders.

Keywords

Forests; cortisol, natural killer; blood pressure; intervention.

Subject

Public Health and Healthcare, Public Health and Health Services

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