Observe Your Child's Spine
Heavy packs may cause kids to change their spinal position to accommodate the load. This can result in back pain, and at worst, the possibility of temporarily compressed discs and posture problems. Studies show that backpack wearers tend to begin adapting their posture once the weight of the pack reaches about 26 lbs. At an estimated 20% of the child’s weight, a backpack load may even begin to interfere with breathing. So observe your child's spine when it's on and adjust the load according to the other tips on this post.