I hear a lot of people complain about pulling their rolling bags and then having shoulder or back problems. So I tend to watch people doing this. What I see is most twisting their arm and grabbing the handle palm facing down.
Bad idea. Try this. Grab the handle palm up and you will have less twist in the arm and shoulder and probably less strain. It may even be more comfortable.
It may not work for everyone but might for some. It helped me a great deal.
Since I have to ask a question by board rules.....Has anyone found this to work for them?