The backpack isn't the problem — wearing it low is.

The weight matters, but how your kid wears the pack matters way more.

Real talk: a loaded backpack should top out around 10–15% of your teenager’s body weight. A 120-pound kid hauling a 20-pound pack is over the line. But in my experience, most of the lower back pain comes from kids wearing the pack low, dangling around the butt. That pulls the shoulders forward and arches the lower back — the exact position that wrecks it. Fix the fit before you blame the load.

The pack should sit high, hugging the upper back, with the bottom around the waistline. Heavy textbooks go flat against the back, closest to the spine, not in the front pocket. Both straps on, snug but not strangling. If the pack has a chest or waist strap, use it — that transfers the weight from your spine to your hips, which is where it belongs.

One more thing worth nagging about: the locker. Teenagers will carry their entire academic life between classes instead of making a five-second stop. Use the locker, and the weight problem mostly disappears. And if they’re still sore after all this, it’s a core strength thing — a soft midsection absorbs the same load way worse than a strong one.

Fix the hang before you blame the load.