Northeastern professor warns big backpacks cause big back pains
...ding to the American Physical Therapy Association, backpacks should weigh no more than 15 percent of the carrie...total body weight. However, Hickey recommends that backpacks weigh in at no more than a tenth of a child's body weight. "Kids who use backpacks often use the...Study on toxic exposures in urban environments
...as important, the samples collected by the student backpacks had the same 'source signature' as the samples collected during the subway study in that they had the same ratio of Fe to Mn and Cr to Mn. "All indicators for the increased exposure levels point to the subway microenvironment as the source of steel......school children to lighten their loads, wear their backpacks on both shoulders and avoid lugging around those h...ty of Michigan Health System physiatrist indicates backpacks don't cause the stress and strain on young backs that they've been linked to. "There is no good scie...