You will hurt yourself no manner what style you take. We should focus on regular exercises and stretching, bending down for light stuff is still fine but if there are heavy stuff to carry, just get the guys to do it!
When you're picking or lifting up something from the ground, do you bend down or squad down to do it? I notice most people bend down. That's very bad, even for light objects. In the long run, that's where all the backache and spinal problems come from. So next time, squad down to do it.