Ifyouaresittingdownreadingthisreport，standup，moveyourlegsandtouchyourfeetifyoucan．Doanythingbutsit．Ifyoucutdownonthetimeyouspendsitting，youmightlivelonger．Newresearchshowsthatsittinglessthanthreehou

　　If you are sitting down reading this report，stand up，move your legs and touch your feet if you can．Do anything but sit．If you cut down on the time you spend sitting，you might live longer．New research shows that sitting less than three hours a day might make your life longer by two years．

　　The human body is designed to move．But mordern lifestyles and office jobs don't give us the chance to move around very often．

　　Peter Katzmarzyk，a scientist at the University of Louisiana in the southern United States，says that sitting is ubiquitous in our lives，meaning it is something we do all the time．We sit while we're eating，we sit in the car，we sit while we watch TV．And many of us sit for long hours at work．On average，Americans report that they sit between four and a half to five hours a day．

　　Mr．Katzmarzyk says you may exercise often．But，he says even that does not mean you can sit for the rest of your waking hours．"We can't throw away physical activity．It's extremely important，but moving is also important．Even if you exercise for 30minutes a day，what goes on in the other 23.5hours a day is also very important．"He found that cutting television time to less than two hours a day could add 1.4years to life．

　　Change is already coming to some offices，especially in the design of desks．A"standing desk"lets people stand while they work．Another new design is called the"treadmill desk．"A treadmill is an exercise machine that lets you walk in one place．Even some U．S schools are beginning to experiment with desks that are part bicycles to keep children moving．

　　If you work in office job，Mr．Katzmarzyk and his team suggest a few simple changes：

　　•get up from your desk as often as you can

　　•take walks at lunch time

　　•instead of emailing colleagues（同事），walk to their offices and talk directly．

　　All these activities may help you live longer．

　　43．Where is the passage above probably