"Students who carried heavy backpacks - at least 15 percent of their body weight - were 1.2 times more likely to suffer back pain."

Two days later, I was in tears, struggling up a hill with this heavy backpack.

I have a bad back and fear that a heavy backpack might exacerbate the pain.

The straps of the heavy backpack cut into her shoulder.

To her heavy backpack, she says, "That is a piece of absolute death."

Carrying a heavy backpack may increase a child's chances of a back problem or injury.

The father hadn't done any serious walking since 1963, when he carried a heavy backpack and wore an Army uniform.

It made for a heavy backpack, but he wouldn't be carrying it all day.

There are ways to solve the problem of heavy backpacks.

Most parents of middle school students do not remember carrying such heavy backpacks themselves.