Hi, everyone!
I sent a similar DM to u/butt_munky who gave me some great pointers, but also suggested that I make a general post.
I have been really struggling to figure out what the involuntaries are, as they seem to be crucial to making progress to good feelings with the Aneros. I have some medical training, so have been trying to figure out exactly what these are, to know if I have been getting them or if I need to redirect my training.
If, as some have suggested, I try to hold PC contractions at various levels of intensity, the muscle will eventually fatigue. This is just like trying to hold an arm curl with a dumbbell for a long period of time. The muscle will start to shake because it has run “out of gas,” going into something called “tetany.” It can be pretty exhausting (as with the dumbbell) to hold this level of contraction, and the muscle trembling is not particularly pleasurable. If I really concentrate, I can sometimes force my mind to think that this is pleasurable, maybe with an occasional very brief “zing” of what I assume might be the start of a P-wave. Most writers don’t seem to indicate that their sessions are exhausting.