8.
阅读理解
Are
you carrying too much on your back at school? You're not the only one. Back
experts in the United States are worried that young students are having back
and neck problems as a result of carrying too much in their backpacks
(schoolbags).
"It hurts my back when I run,"
said Oberlin Reyes, a student in Virginia. "It's hard to get up the stairs
with my backpack, because it's too heavy."
Oberlin is among students whose backpacks
were weighed for a week in a recent study. They had regular backpacks with two
straps (带子) to carry them, but a
number of students with heavy loads had switched to rolling backpacks
(which have wheels and can roll on the ground). Shirley Park, whose backpack
weighed 10 kilograms, said she changed to a rolling backpack because she was
starting to have back pain.
How much is too much? Experts say students
should carry no more than 10 to 15 percent of their own body weight.
A few students had one suggestion to
lighten the load: less homework.
P.S.
(附) Doctor's suggestion:
① Lighten the load.
Clean out binders (活页材料) and take home only
the books you need that night.
② Wide straps are
better. They send out the weight over your shoulders more evenly (均匀). And be sure to wear both straps rather than hanging the pack over
one shoulder.
③ Pack smart. The
heavier things should be packed closed to the back.
④ Bend both knees when
you pick up the pack, and don't just bend over at the waist (腰).