A heavy or unevenly weighted backpack can put a lot of strain on your child’s back, neck or shoulders. Start by choosing a well-fitting bag with padded, adjustable shoulder straps and multiple pockets. Evenly pack only what is needed for the day, with heavier items placed close to your child’s body and lighter objects in the outer pockets. The total weight of the pack should be no more than 15 percent of your child’s body weight. If your child experiences discomfort related to heavy bags or poor posture, chiropractic care can often be very helpful.