A stroll to school in the morning can help kids prepare for the stresses that await them in the classroom. They’ll have less 1 increases in heart rate and blood pressure when they’re put on the spot. That’s the 2 from a new study by researchers at the University of Buffalo medical sc hool. Those researchers 3 assigned a group of kids aged 10 to 14 either to sit in a comfortable chair while watching a slide show of a 4 neighborhood (to simulate a car ride) or to walk a mile on a treadmill, wearing a backpack, while the same slide show played (to simulate a walk to school). After that, all the kids were asked to take a quick test—the famous Stroop task, where you have to read the name of color when the word has been printed in a different color. The kids who’d walked a mile showed fewer 5 of physical stress in front of the testers—with statistically significantly smaller increases in heart rate and blood pressure—and gave lower ratings, too, when asked about how stressed they 6 felt. Exercises, it seems, “may blunt children' s cardiovascular( 心脑血管的 ) reactivity when 7 with cognitive stressors during the school day,” the researchers says. How did this happen? According to the Buffalo researchers, one way that walking exercise may 8 less-induced cardiovascular reactivity is by altering an individual’s evaluation of stressful stimuli such as reducing the 9 threat of the event. Getting some exercise, in other words may help kids put minor 10 like the Stroop task in perspective, keeping their nervousness in check. A) reserve F) signs K) furious B) suburban G) confronted L) actually C) implication H) assumption M) dwelled D) literally I) perceived N) randomly E) severe J) challenges O) restrain