I'm wondering if my backpack could cause future damage to my shoulders/back, it seems pretty likely to me. According to my scale, the backpack weighs 33lbs (I thought it was around 20lb! ). Things that majorly contribute to this are 4 textbooks (at least two of which are over 1000 pages), five notebooks, a workbook, a filled water bottle, two calculators (one graphing), and then an expandable file that probably has a couple hundred pages itself. So yeah, a lot of stuff. I wear the backpack around 10 minutes walking to the bus stop/standing at the bus stop, 15 minutes at the beginning of school, about 5 minutes at every one of the 6 passing periods, probably another 10 minutes at the end of school, then another 5 minutes walking home from the bus. So total would be an hour and 10 minutes (70 minutes). It's a backpack with two straps, so the weight should be pretty evenly distributed (no, I don't wear it with only one strap). If it's possible that this could cause some back/shoulder problems in the future, then I'll try and find my locker/get its combo (wherever it is I'm pretty sure it isn't very close to my route). At 33lbs for about 70 minutes a day, I'm pretty sure that could cause some damage of some sort. Thoughts?