After 3o years of lifting, lugging, tugging, pulling, hefting, pushing, hauling and wrestling, I ain't got 12 good hours a day left in me. My back aches, my sciatica is a killer, got arthritis in my hips, hands, feet, ankles and back. Got a slipped disc, a fused spine from a stress fracture (lifted a 300 lb pt during an emergency and broke my darn back doing it.) Arches fell 20 years ago, rump followed a few years later--now by doggong cheeks and eyelids are tryng to join em. Worst part-doesn't seem to be too many kids coming up behind me. If you need me to work for another 10 years, you better start protecting me a little. Shorter shifts, lift team and devices, power stretchers, easier to move equipment etc. all will take the strain off the old bod.