Table 2.

Search Keywords.

PICO	Keywords
Intervention Activities	“forest therapy” OR “forest bathing” OR “shinrin-yoku” OR “shinrin yoku” OR “forest walk” OR “forest walking” OR “forest recreation” OR “nature therapy” OR “forest trip” OR “forest visit” OR (“trip” NEAR “forest”) OR (“visit” NEAR “forest”) OR (“spending time” NEAR “forest”) OR (“walking” NEAR “forest”) OR (“viewing” NEAR “forest”)
Undertaken Area	“stand density” OR “tree density” OR “strains/ha” OR “stands/ha” OR “trees/ha” OR “basal area” OR “canopy density” OR “canopy openness” OR “canopy closure” OR “sky view factor” OR “gap light analysis” OR (“managed” NEAR “forest”) OR (“unmanaged” NEAR “forest”) OR (“thinned” NEAR “forest”) OR (“unthinned” NEAR “forest”) OR “thinned condition” OR “unthinned condition” OR “thinning intensity” OR (“light environment” NEAR “tree vegetation”) OR (“light environment” NEAR “trees”) OR (“environmental factor” NEAR “forest”) OR (“environmental factor” NEAR “tree vegetation”) OR (“environmental factor” NEAR “trees”) OR (“microclimate” NEAR “forest”) OR (“microclimate” NEAR “tree vegetation”) OR (“microclimate” NEAR “trees”) OR (“physical environment” NEAR “forest”) OR (“physical environment” NEAR “tree vegetation”) OR (“physical environment” NEAR “trees”) OR (“forest” NEAR “structure”) OR “forest landscapes” OR “forest sites” OR “forests”
Outcome	“health” OR “well-being” OR “well-being” OR “psychological” OR “physiological” OR “psycho-physiological” OR “restorativeness” OR “restorative effect” OR “restorative experience” OR “psychological restoration” OR “PRS” OR “perceived restorativeness schedule” OR “ROS” OR “restorative outcome scale” OR “mood” OR “affective state” OR “POMS” OR “profile and mood state questionnaire” OR “PANAS” OR “positive and negative affect schedule” OR “anxiety” OR “STAI” OR “Spielberger state-trait anxiety inventory” OR “self-reporting anxiety scale” OR “depression” OR “BDI” OR “Beck depression inventory” OR “self-reporting depression scale” OR “vitality” OR “SVS” OR “subjective vitality scale” OR “psychological relaxation” OR “physiological relaxation” OR “psycho-physiological relaxation” OR “psychological response” OR “physiological response” OR “blood pressure” OR “SBP” OR “systolic blood pressure” OR “DBP” OR “diastolic blood pressure” OR “pulse rate” OR “heart rate” OR “HRV” OR “heart rate variability” OR “SDNN” OR “RMSSD” OR “LF” OR “HF” OR “LF/HF” OR “skin conductance” OR “SCR” OR “brain wave” OR “prefrontal activity” OR “SpO2” OR “EEG” OR stress reduction” OR “stress recovery” OR “stress restoration” OR “cortisol” OR “saliva”