As most administrators know, schools have been barring backpacks for years to prevent students from concealing weapons and other potentially problematic objects.
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Carrying a heavy pack changes the way kids walk and puts them at risk of falling, particularly on stairs or other places where a backpack puts a student off balance.
Virtually every elementary schooler in Japan is required to carry their books to and from school in a randoseru, so the bags represent a major family expense.
Any child who has already learned to walk and can stand,carry a backpack. Given that most toddlers learn to walk at around one year of age, you might want to buy a backpack when they're around one and a half or two years of age.
• Check your postureIn one study, it shows that when a person carries a backpack, it can put a force about 7.2 times the weight of the backpack on the spine. This amount of force can increase to 11.6 times if the person is slumped forward. This stress on the spine can result in back pain and posture issues.
Pain caused from excessive loads has gained the term “backpack syndrome.” Backpack syndrome causes headaches, neck and back pain, and fatigue. There have been studies examining the effects of carrying backpacks on one shoulder versus both shoulders. Carrying a bag on one shoulder causes significant asymmetries.
Backpacks that are too heavy or are worn incorrectly can cause problems for children and teenagers. Improperly used backpacks may injure muscles and joints. This can lead to severe back, neck, and shoulder pain, as well as posture problems.