Back injuries are no fun and can last a lifetime.
I initially hurt my back when I was in my early twenties moving an IBM Selectric typewriter from one shelf waist high to the next shelf higher. Now that I am older (actually a little over 58) even staying a slightly bent over position can cause to be pain for weeks. I know I recently repair a little light weight 2 cycle edger here and was barely able to even move around for 4 weeks and this thing I could lift and move around one handed. All I got to be in the right position sometimes to cause problems that last for weeks.
Well for me it what ever works for what needs to be done. I am not able lift items much anymore due back problems. I know it looks like over kill but I even use one of those 2 ton engine lifts to remove, repair, and reinstall those v-twins. Rather get some strange looks than go through the pain. I am now considering one of 1 ton gantry type cranes with trolley and electric lifting winch, mainly because the legs of the 2 ton lift gets in the way on larger riding and ZTR mower's wheels.
I don't always need a lift but I have learn to pay attention what I am doing and to my back; it will let know when it is a not a today thing to do. That is why I am found a lot time sitting short foot stool or even sitting on the ground when working on some equipment that just need carburetor work. Just can't stay bent over for long periods at a time.
