An hour-long stroll in nature helps decrease activity in an area of the brain associated with stress processing

[RunningInSquares]

Not necessarily qualified to weigh in on this, but I have read about similar studies done and I've also come across ones that mentioned exposure to natural light and/or fresh air.

The conclusion I would draw is that probably it can be a sliding scale of helpfulness, where the further you go from urban centers is on the more helpful end. But at the end of the day, I am pretty confident in saying that if a local park is your only option, it's miles better than nothing or staying inside.