"According to a study published last July in Proceedings of the National Academy of Sciences, a 90-minute walk through a natural environment had a huge
positive impact on participants. In a survey taken afterwards, those people who took the natural walk showed far lower levels of brooding, or obsessive worry. The control group who spent that 90 minutes walking through a city reported no such difference. Not only that, but the scientists went a step further and did brain scans of the subjects. They found that there was decreased blood flow to the subgenual prefrontal cortex. What in the world does that mean? Well, increased blood flow to this region of the brain is associated with bad moods. Everything from feeling sad about something, to worrying, to major depression seem to be tied to this brain region. Hiking deactivates it."
For more information, click on the link below: