Could the amount of books and supplies your child is carrying around be causing them harm?
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"The American Chiropractic Association recommends no more then 10% of their body weight," said Chiropractor Stephen Thaxton. "If you think about that there's a lot of kids out there that are less than 100 pounds, but if you use a hundred pounds as an example 10% of that they need to have a 10 pound or less backpack."
If you're worried about the weight your child is carrying around Thaxton has some advice to help lighted the load.
He suggests that students use both shoulder straps. "Balance really is the key to life, so if you can keep that pack balanced on both sides that takes a lot of strain off these muscles and the shoulders themselves."
Thaxton also suggest using a backpack with wheels to really lighten the load.