Taking at least twenty minutes out of your day to walk or sit in a place that makes you feel in cont

Taking at least twenty minutes out of your day to walk or sit in a place that makes you feel in contact with nature will significantly lower your stress hormone levels. That's the finding of a study that has established for the first time the most effective amount of an urban nature experience. Healthcare professionals can use this discovery to prescribe (开药) “nature-pills" in the knowledge that they have a real measurable effect
"We know that spending time in nature reduces stress, but until now it was unclear how much is enough, how often to do it, or even what kind of nature experience will benefit us,” says Dr. Hunter, a lead author of this research. “Our study shows that for the greatest payoff, in terms of efficiently lowering levels of the stress hormone, you should spend 20 to 30 minutes sitting or walking in a place that provides you with a sense of nature.
To assist healthcare professionals looking for evidence-based guidelines on what exactly to distribute, Hunter and her colleagues designed an experiment that would give a realistic estimate of an effective amount.
Over an 8-week period, participants were asked to take a nature pill with a duration of 10 minutes or more, at least 3 times a week. Levels of stress hormone, were measured from saliva (唾液)samples taken before and after a nature pill, once every two weeks. The data revealed that just a twenty-minute nature experience was enough to significantly reduce stress levels.
Healthcare professionals can use our results as an evidence-based rule of thumb on what to put in a nature-pill prescription," said Hunter. "It provides the first estimates of how na- ture experiences impact stress levels in the context of normal daily life. It breaks new ground by addressing some of the complexities of measuring an effective nature amount."
8. What's the great significance of the study?
A. It finds out a new way to release stress.
B. It can help doctors prescribe various pills
C. It makes it clear that exercise can help release stress.
D. It finds out the accurate amount of nature experience.
9. How did Hunter get the finding?
A. By working with some doctors. B. By asking participants questions.
C. By carrying out an experiment. D. By comparing the previous data.
10. What did Hunter think of the result of the study?
A. It has drawbacks. B. It's meaningful.
C It's worth researching further. D. It needs more discussions.
11. What's the main idea of the text?
A. Nature has close relationship with stress.
B. We should stay in nature to keep healthy.
C. We cannot get close to nature frequently.
D. Staying in nature for proper time will lower stress level.
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