This
is an interesting topic.
I have no pelvic floor problems, muscle hypertension etc but I do have PN . My problem begins higher up.
My saddle area is numb, cutaneously only, not densely and I have PN burning, electric flashes, itching, PGAD, all almost exclusively right sided but I have no imbalance 'looks wise'. However I do have sciatica from the same piriformis 'entrapment' and do have leg wasting (gastrocnemius muscle, inside calf part) on rh side and a slight dip in my bum (also r side) along the line of my piriformis muscle, although this is masked by fat just now

, it is there .
I doubt we could positively say that any muscle wastage could indicate actual entrapment?? but obviously you had, sorry have entrapment Calluna. It would be interesting to see if there were any studies on lumbar back problems and visible muscle wastage. Is there a correlation to actual entrapment visible on MRI and degree of muscle wastage?
The other thing that is being discussed here is avoidance as you say molly. Avoidance is natural but when the pain becomes chronic it can, no, it will, cause more problems.
I do try to stand and walk properly (alignment) for instance, but I catch myself out so much. I wouldn't use my crutches until absolutely necessary either, wouldn't stay in bed all day unless I had the flu or something. I have pain in places but I still need to treat my body holistically and if I compensate and 'guard against' too much there will be consequences, just like there will be if I do too much but those aren't quite so permanent. A balance is required. . . .says me, 'reclining' with one leg elevated as if I'm asking someone to limbo under it

or trip them as they pass.
We still need to move as normally as possible but when it comes to the pelvic floor this becomes nonsense.
I wonder if it is simply because motor function has been disrupted in that the motor part of the pudendal nerve has been affected? Mine is just the sensory part I'm sure. . . I can still DO all of the things required in relation to the pudendal nerve I just don't know WHEN I need to do the bowel bit until
very late for instance or it's a surprise when weeing

.
Fall 2008. Misdiagnosed with lumber spine problem. MRN June 2010 indicated pudendal entrapment at Alcocks canal. Diagnosed with complex variant piriformis syndrome with sciatic, pudendal and gluteal entrapment's by Dr Filler 2010.Guided piriformis botox injection 2011 Bristol. 2013, Nerve conduction test positive; new spinal MRI scan negative, so diagnosed for the 4th time with pelvic nerve entrapment, now recognised as Sciatic, pudendal, PFCN and cluneal nerves at piriformis level.