Locked out effect

Interesting point, and it makes me wonder. I don't have an answer for you, just to tell you that I also have issues which might be the same thing. I would describe it as issues with clenching, especially when something foreign is moving in my ass. And then there does feel like after a while if the involuntaries start working well, something further up my rectum is clenching, and if I have control over that I sure don't know how to exert it! All I can say is that I've had certain sessions where this is not a problem and the Aneros has moved freely, and sessions that have stalled out or for whatever reason.

As for a spinal curvature, I don't know if you are talking about scoliosis or something else. I do tend to hunch myself a bit; in fact I'm not sure I really can keep my back completely straight anymore. So if I have a "curvature," it would be somewhere about my shoulder blades. I'm a musician and my university had a demonstration for Alexander Technique once, and that definitely helped, though I need to do the full program at some point. It's supposed to help dancers/musicians/etc be more aware of their bodies, keeping them from doing repetitive movements that could be damaging over time. It sounds like something that might be able to help Aneros users too, so I should probably get around to signing up for lessons! Whether Alexander Technique would work for your lower back or not, I don't know.

@Faith-Fortis

alexander technique helped me because it allowed me to become aware of microscopic movements of my body. It also tought me how to fully relax, and thus control which muscles I clench (so maybe it could be interesting for the original poster of this thread??). In general AT teaches a hyper awareness of one’s body that can only be beneficial for those exploring delicate world of prostate orgasms... I think it is worth reading books on the subject and learning the basic excerises, which are actually non-excercises because they involve relaxing while lying down.

@Faith-Fortis
Yea, I did mean scoliosis. I tend to use "curvature" as I get more general replies of people not knowing what scoliosis is when it comes up anywhere.
We do sound similar in the clench regard however. I'm not entirely sure if mine feels like a muscle clenching, hard to describe the feeling but I'd place it at feeling like tension on a piece of rubber. So the more both sides of "rubber" are pulled, the less the surface area becomes but the tighter it becomes. Yet I can't seem to place what causes it or how to subsequently relax it again.

But it could very well be the same thing as the areas aren't too different. I also do get the random sessions where nothing is tense yet I can't pinpoint any reason why, no differences really come to mind. I mostly thought of my back as a potential nerve conflict; so sending the wrong signals because of a foreign body.
I haven't heard of the Alexander Technique however and I might try employing that in some method, regardless of if it works or not. Any suggestions are helpful suggestions to me.

Your mention of a do nut cushion piqued my interest @Vermith . I would like to start doing my sessions in more of a seated position. Could you give me more information about the cushion and if you don't mind saying how you employ it during your sessions.Where do you do your sessions bedroom. living room ?

@JohnHope
Sure. "Donut" cushions are just generic names for tailbone/seat/coccyx cushions. https://www.amazon.com/Dr-Fredericks-Original-Donut-Cushion/dp/B00T3TUXTW/ is an example. You just have to make sure the tabs of whatever model you use have enough room to not hit any part of center hole. Two smaller, vertical pillows with enough width to pad your legs whilst seated could also probably work. I keep a towel underneath the cushion being mines washable.
I sit on a small recliner with my legs and feet either relaxed on the footrest, or bent and with my feet flat on the rest.
I don't do anything specific outside sitting on it in a position that doesn't impede anything externally or internally. So making sure no Aneros movement externally will hit the cushion, and internally not compacting my body by sitting with my legs so close I restrict internal movement.

Laying down relaxes me too much in general but it depends on the model. Smaller models (eupho/helix trident syn) are what I use sitting up, larger models get too much contact for my liking.
Always do my sessions in my bedroom. Hope that helps.

Thank you, the information is most useful. I'll get one of those cushions ordered as I think it will help greatly.

@divine_oblivion I actually have a book on Alexander Technique, found it at Goodwill for $1.50! Haven't read it yet, though. @Vermith I don't know enough about Alexander Technique to know if it would help with scoliosis or not, that's more a lateral curvature, isn't it?

Still that's one of the things that's been on my list to learn (there's a guy not too far from me that gives lessons). I'm definitely a believer though: in the demonstration that I attended, I merely laid on the ground for about 15 minutes and when I got up I could tell that I was standing straighter and walking taller than I have in years. It was such a foreign sensation and honestly I was afraid of getting comments about how much differently I was walking, that I regressed back into my usual stance almost immediately. Looking at some of the before and after pictures I've seen it felt exactly like that. There should probably be an entire thread on this, but not in yours.

Laying down relaxes me too much in general but it depends on the model. Smaller models (eupho/helix trident syn) are what I use sitting up, larger models get too much contact for my liking.

If you're like me then I suppose that if you lay down then you fall asleep! That may be a symptom that I'm not getting enough sleep in general though; I had a session last night/this morning that has me thinking I'm not relaxed enough unless it's after I just woke up. I do like the idea of a doughnut cushion though; also the idea of a doughnut. 😉