Modifications for Shoulders
Most of the moves involving shoulders will be helpful for reducing stiffness of the joints. Go slowly if you are uncomfortable and stick to the basic.
#3 – Laughing Windmills
If you have current Rotator Cuff problems — go slowly, gently and stick to the basic positions. Determine if pain starts at any particular position, and back off from that spot while continuing movement if you can.
Movement is necessary to regain pain-free range of motion (ROM).
#20 & #23 – PQL Sweeps
If your shoulders do not yet feel strong enough to comfortably hold you in place before your lifts (which is a position that stretches muscles on the side of your torso), stay laying on side with your head on your 'pillow' arm. Wait until the last moment to come up for the lifts (just before the 1-2-3 count). This is the preferred modification, although it's less of a stretch to the back muscles.
It's best to stick to the basic moves (rather than advanced) if you have any shoulder pain or weakness. Try the first approach above before reverting to this additional adaption. If you need to, simply remain on your side (and forearm), continuing to use your head as a pillow during the pulse-lifts. This latter stance is a bit more awkward in the pulse-up phase, and harder to receive full benefit to the important back quadratus lumborum muscles, but it is a modification if needed.