Forest bathing (shinrin-yoku)
Slow time in trees lowers cortisol and blood pressure. Formalised in Japan; the underlying observation is older.
Why
Shinrin-yoku ('forest bathing') is the Japanese practice of slow, sensory immersion in forested environments. Studies measuring cortisol, blood pressure, and pulse before and after 2-hour forest visits consistently show parasympathetic shifts. Effects partly attributed to phytoncides (volatile compounds released by trees) and partly to general nature exposure.
Slot in your day
How to do it
How
2 hours minimum in a forested area. No exercise focus: slow walking, sitting, sensory attention. Phone off. Once a week if possible; once a month is still meaningful.
Markers this may influence
Evidence
Ideno 2017 BMC Complement Altern Med meta-analysis (20 trials, n=732): forest environments significantly lowered both systolic and diastolic blood pressure vs. non-forest controls: consistent autonomic shifts toward parasympathetic dominance. Effect direction is steady; absolute magnitude is modest and trial quality variable.