Taking a walk in the park could help those suffering from depression, researchers have found out. They studied whether a nature walk could improve the mood of people with clinical depression. The research also tested theories developed in a cognitive(认知的)science field known as Attention Restoration Theory, which presents that people concentrate better after spending time in nature or looking at natural scenes.

　　According to ART, those in peaceful settings are not stricken with external distractions(外部干扰)，which affect their working memory and attention systems. As a result, the brain can relax and enter a state of contemplation(沉思),which helps restore cognitive ability.

　　For the latest study,20 people with clinical depression took part in an experiment that involved walking in a quiet natural setting and in a noisy urban setting. Before their walks, the participants completed a test to determine their cognitive and mood state, and were asked to think about an unsolved , painful memory. They were then told to go for an hour-long walk in a woodland park, or walk along a busy street. The routes were mapped out and the participants wore a GPS watch to make sure they went to the right place. After their walks were completed, they took part in a series of mental tests to measure their attention, and short-term and working memory. A week later, the participants repeated the study but went for a walk in a location they did not visit in the first experiment.

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