In 2019 a study published in the International Journal of Environmental Health Research shows just how little time it takes to get the benefits of being outside:
Spending just 20 minutes in a park — even if you don’t exercise while you’re there — is enough to improve well-being, according to the research.
For the study, researchers surveyed 94 adults who visited one of three urban parks near Birmingham over the summer and fall. They were given fitness trackers to measure physical activity but were not told what to do in the park or how long to stay. Each person also answered questions about their life satisfaction and mood — which were used to calculate a subjective well-being score, with a maximum value of 55 — before and after their park visit. The average park visit lasted 32 minutes, and 30% of people engaged in at least moderate-intensity physical activity while there. Well-being scores rose during the park visit in 60% of people, with an average increase of about 1.5 points (from about 37 to 39).
Physical activity was not necessary to increase well-being, the study authors found, even though plenty of research suggests that exercise is great for your mental well-being, especially when it’s done outside! For many people in the study, simply being in green space seemed to be enough to spark a change, says study co-author Hon Yuen, director of research in the occupational therapy department at the University of Alabama at Birmingham.
“Some people may go to the park and just enjoy nature. It’s not that they have to be rigorous in terms of exercise,” Yuen says. “You relax and reduce stress, and then you feel more happy.”