i'll tell you my kids were old enough to see me crawl up the stairs to bed and crawl in to the bathroom so when i tell them to LIFT WITH THERE LEGS THEY HEED the warning , they tell me i know , because they know what a hurt back will do to them.
like i tell my coworkers when they want to lift some thing to heavy ,the old adage WORK SMARTER NOT HARDER !!!!especially when we have the equipment to lift with no injury to any one ...