A recent study done in Spain shows that one in four children suffer back pain as a result of carrying too much in their school rucksacks. The study of 1403 children aged between 12 and 17 found that almost two-thirds carried rucksacks weighing more than 10% of their own body weight, averaging at 7kgs (15lbs) per bag. Taken from “The Week” Issue no 862.
A problem I encounter regularly with teenagers. This can often lead to shoulder problems too. A regular check of how much is in the rucksack and leaving out books/items not needed for the day could help. Ensure the rucksack is carried over both shoulders too!