More than most people realize. Low back pain usually starts at an early age. It can even be found in young children, who may have slight pain that doesn't last very long. By age nine or 10, 10 percent of kids have low back pain. By age 13, low back pain becomes as common as it is for adults. When it comes to back pain, it seems kids grow up fast.

The solution? Education and practice. Most low back pain results from poor bending and lifting techniques. If children are taught good habits early, they're less likely to suffer from low back pain. A doctor or physical therapist can "coach" kids on good technique and recommend exercises to strengthen the low back.