@jewlz1 : I halve also had back issues for 10 years prior to RTKR in Sept. 2018. Best general advice is to be consistent with stretching exercises for general pain reduction/relief in back and hips. It took several months until I was relatively pain free. Kept up the stretches on a daily basis for over 10 years now. Specifically how to handle leg lifts with back problems: I found to do them on the (carpeted) floor - firm, solid surface, and support my back by placing my hands palms down under the “hollow” of my back, down low. It helped change the angle of the back involvement and made the leg lifts much less painful. Perhaps that might help you as well.