英语翻译Walking to Exercise the Brain　　Do you think sitting and

英语翻译
Walking to Exercise the Brain
　　Do you think sitting and studying all the time will improve your grades?Think again．Getting some exercise may help,too．
　　New research with older people suggests that taking regular walks helps them pay attention better than if they didn't exercise．
　　Previous research had shown that mice learn,remember,and pay attention better after a few weeks of working out on a running wheel．Mice that exercise have greater blood flow to the brain than those who don't．Their brain cells also make more connections．
　　Neuroscientists from the University at Urbana-Champaign wanted to find out if the same thing is true for people．First,they measured the physical fitness of 41 adults,ages 58 to 77,after each per-son walked 1 mile．Then,participants looked at arrows on a computer sczeen and had to use com-puter keys to show which way one particular arrow was pointing．
　　Adults who were physically fit were faster at the arrow task,and their answers were just as ac- curate as their less-fit peers,the researchers found．The fitter participants also had more blood flow to a part of their brain responsible for paying attention and making decisions．
　　In a second study,15 elderly people who completed a 6-month aerobic-training course were fas-ter at attention tasks compared with 14 seniors who just did stretching and toning exercises for the same amount of time．
　　So,even going for a walk every 2 or 3 days forjust 10 to 45 minutes can help．That should be good