Nature experience reduces rumination and subgenual prefrontal cortex activation.
Level 2 - randomized trial
Controlled experimental comparison of nature vs. urban walking interventions
PubMed 26124129 · doi:10.1073/pnas.1510459112
What was done
Healthy participants completed a 90-minute walk in either a natural or an urban environment. Investigators measured pre- and post-walk changes in self-reported rumination and neural activity in the subgenual prefrontal cortex (sgPFC).
What was found
A 90-minute walk in a natural setting decreased both self-reported rumination and sgPFC neural activity, whereas a 90-minute walk in an urban setting did not produce these effects. The abstract provides no specific numerical values, sample sizes, or test statistics.
Why it matters
The study identifies subgenual prefrontal cortex down-regulation as a potential neural mechanism linking nature exposure to decreased depressive rumination.
Limits
The abstract omits sample size, participant demographics, allocation methods, and exact quantitative effect sizes. The findings reflect acute effects in healthy participants and may not generalize to clinical populations with depression.
Cited by
- supports Head-to-head comparison studies show that aerobic walking in a natural environment produces a profound antidepressant and mood benefit not observed when walking in an urban environment.