A recent report by the American Heart Association— a big organization that encourages adults and kids to stay healthy— found that kids 30 years ago could run faster and longer than kids today.The report found that today\’s kids are 15 percent less healthy than kids from years ago.What does that mean?Let\’s say you\’re a 12-year-old girl.You\’re not a sports superstar,but you\’re pretty good— kind of average（平均的）.Let\’s say your mom was the same kind of kid when she was your age.Now imagine we could set up a mile race between you and your mom from 30 years ago.Wouldn\’t that be cool?What wouldn\’t be so cool is that the study shows your mom would probably beat you in the race by 90 seconds（秒）.That\’s a lot.It was the same for boys.An average boy from 30 years ago would beat an average boy today.
The scientists who did the study think there are some reasons for the big fall in fitness.First,too many of today\’s kids are overweight（超重的）.That makes it harder for them to run fast.Second,kids today don\’t get enough exercise.Doctors say kids should get at least 60 minutes of exercise a day.That\’s why it is important for schools to have P.E.classes.
So what should kids do?If you don\’t want your mom and dad to think they are faster than you,don\’t spend a lot of time playing computer games,watching TV or movies.Instead,do things that will get you up and to move.

根据材料内容简要回答下列问题.
（1）What did the report find? ______
（2）How many reasons does the writer give to explain the big fall in fitness? ______
（3）How much exercise do kids need a day according to the passage? ______
（4）If you are overweight（超重的）,what should you do ? ______
（5）将文中划线部分翻译成中文. ______