Researchers have determined for the first time the maximum weight a child should carry using a school backpack trolley: a maximum of 20% of their body weight.

To date, weight recommendations have been established for ordinary school backpacks, as they are the most widely used type in the school context worldwide. However, some children use backpacks on wheeled trolleys, and until now there have been no studies making weight recommendations for this type of backpack.

The main findings of the study indicate that the greatest alterations when using trolleys or backpacks are produced in the hip and trunk, while there is little difference in the kinematics of the knee and ankle. However, pulling the backpack trolley produces fewer changes in the child’s kinematics and, therefore, resembles more closely their movement when walking free of any load, compared to carrying the backpack, even when it weighs very little.

As an overall conclusion, the study corroborates that schoolchildren who wear backpacks should avoid carrying loads greater than 10% of their body weight. Furthermore, in a new finding, when pulling a school backpack trolley, the child should avoid any load greater than 20% of their body weight.

If you or your child should experience any pain or discomfort resulting from backpack use, consider visiting a doctor of chiropractic (DC). DCs are licensed and trained to diagnose and treat patients of all ages and will use a gentler type of treatment for children. In addition, DCs can also prescribe exercises designed to help children develop strong muscles, along with instruction in good nutrition, posture and sleeping habits.

Presented as a service to the community by: Union County Chiropractic Clinic, 110 Skyline Drive, Maynardville, TN (865) 992-7000 www.unioncountychiropractic.com.