Happy Back, Correct Backpack: Expert Physiotherapist Tips

Every day, millions of children carry their school backpacks, often filled with books and supplies, on their small backs. While a backpack is an indispensable tool, incorrect use or excessive weight can have a significant impact on our children's posture and spinal health. As a physiotherapist, my goal is to offer you the keys to ensure that your child's backpack is an ally and not a burden on their development.

The Right Weight: The 10-15% Golden Rule

One of the most common mistakes is loading the backpack with excessive weight. The general recommendation is that the backpack's weight should not exceed 10-15% of the child's body weight. For example, a child weighing 30 kg should not carry a backpack heavier than 3-4.5 kg. Why is this limit so important? A greater weight can strain the spine, alter the center of gravity, cause muscle pain, postural imbalances, and, in the long term, contribute to more serious problems like functional scoliosis or disc hernias in adolescence.

To ensure your child isn't carrying an excessive load, get into the habit of weighing the backpack occasionally and, most importantly, checking its contents. Many unnecessary items creep in without us realizing it! Encourage your child to carry only the essentials for each day.

Perfect Fit: The Art of Wearing It Right

As important as the weight is how the backpack is carried. An improper fit can negate the benefits of a lightweight backpack. Follow these essential recommendations:

• Use Both Straps: It is crucial to wear the backpack on both shoulders. Carrying it on one shoulder causes an asymmetrical weight distribution, straining one side of the body and altering spinal alignment.
• Wide, Padded Straps: Straps should be wide and padded to distribute pressure evenly and prevent them from digging into the shoulders.
• Correct Height: The backpack should fit snugly and high on the back, without hanging below the waistline. The bottom of the backpack should not extend more than 5 cm below the waist.
• Waist/Chest Strap: If the backpack has additional straps around the waist or chest, use them. They help distribute weight more efficiently towards the hips, reducing the load on the shoulders and back.
• Internal Organization: Place heavier items (large books) closest to the back to keep the child's center of gravity as close to their body as possible. Distribute the rest of the items evenly.

Choose Wisely: Backpack Types and Key Features

The choice of backpack also plays a crucial role. Not all backpacks are created equal:

• Traditional Ergonomic Backpacks: Look for backpacks with a padded, rigid back that conforms to the natural curve of the spine, multiple compartments for better weight distribution, and, as mentioned, wide, padded shoulder straps.
• Wheeled Backpacks (Trolley): These can be an excellent alternative for children who have to carry a lot of weight or travel long distances, as they eliminate direct load on the back. However, they also have drawbacks: they can be difficult to pull up stairs or curbs and require trunk twisting when dragging them, so it's vital to alternate the arm used to pull and maintain good posture. They are not always the ideal solution for everyone.
• Avoid Single-Strap Backpacks: Messenger bags or single-shoulder bags are not recommended for daily school use, as they concentrate all the weight on one side of the body, promoting imbalances.

Conclusion

Prevention is key when it comes to our children's back health. Get involved in choosing and adjusting their backpack, teach them how to carry it correctly, and foster healthy habits that strengthen their muscles and posture. If your son or daughter experiences recurring back pain, do not hesitate to consult a physiotherapist. Early evaluation can prevent long-term problems and ensure their school years are comfortable and pain-free.