Backpacks: the silent, heavy killer

Overloaded backpacks on kinder account for 100,000 10,000+ (thanks, Stefan) hospital visits per year.

On average, the children toted about 14% of their body weight on their backs each day, Lane and his team report in the January issue of Archives of Disease in Childhood. The bags generally became heavier as the children grew older. The lightest-weight bag was less than 2 kg (4.4 lbs) and the heaviest was 13.5 kilograms (30 lbs).

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