He found that those who were taken to a green space surrounded by trees enjoyed a speedier recovery ​ — as measured by heart rate and blood pressure — ​ than did those not exposed to a natural setting. A similar test found that patients recuperating in the hospital after surgery benefited from staying in rooms that overlooked trees.
ტეხასის უნივერსიტეტის პროფესორმა როჯერ ულრიკმა სტრესის გამომწვევი ტესტი ჩაატარა ადამიანთა ერთ ჯგუფზე.