Biomechanics journal, Nov 2004
"Hip belts, load positions affect forces felt by backpack wearers" November 19, 2004 The biomechanical effects of backpack wear may have as much to do with hip belt wear or load positioning as with load weight, according to research presented in September at the annual meeting of the American Society of Biomechanics in Portland, OR http://www.biomech.com/showArticle.jhtml?articleID=52601707 make sure the load is high in the backpack, and that it has a waist belt, and not slung over one shoulder like I did when I was a kid Ami.