It's great that westerners are exploring these things, but I can't help but think the strong aversion people have for things not being "proven" by western science is holding everyone back. This is literally yoga and meditation practice and has been studied for at least a couple thousand years.
Even if we exclude the modern invention of yoga as exercise in the 20th century, there are seated practices of releasing these tensions in the body. It's not even framed in mystical terms, it's literally just opening the body and getting rid of discomfort, pain, and stress in the body so that you can sit and focus for longer periods of time in your formal meditation practice.
Even in the author's teacher's capital V Vipassana tradition, invented in the 20th century, it is known that the piti that arises even in the first stages of meditation can be directed. That weak piti is just the piloerection response, which is an autonomic response, and if you can control it it would seem to imply we of course have facility over things science assumes we have no control over.
That has been my experience as well. I have developed my own little technique around this idea, where you invite tight areas of your body to soften and spontaneously make tiny stretching or unwinding movements - without forcing, bracing, or following a scripted routine. I call it Intuitive Release.
[1] https://en.wikipedia.org/wiki/Mindfulness#Watching_the_breat...
[2] https://en.wikipedia.org/wiki/Progressive_muscle_relaxation
Tried it, works, does exactly what the author wants. And while it is a meditation technique, it skips all the religious nonsense and focuses on the relevant.
I've discovered recently the two indeed are opposites and meditation is considered to be a kind of wakefulness, that I personally find no benefit in.
People who are in need of relaxation I therefore find do not want or need meditation as it enforces a moderate kind of wakefulness.
They either should in this alternative view, rest (which is an unfocused and unforced state whereas meditation maintains some kind of focus and attention) or engage in something "wakeful" which might naturally involve having attention.
What should it be if there is no burden of stress or negative impression of any emotion? Why rid of stress? It comes and goes, it is as fleeting as relaxation.
I guess meditation is a insight into there being no problem to solve, once that insight is clear, there is no need for meditation.
https://suttacentral.net/mn10/en/sujato
anecdotally, I had a late PoTS (postural static tachycardia syndrome, blood vessels don't autonomically constrict correctly depending on posture) diagnosis, then hypermobile EDS (tissue that's more floppy)
I realised on body scan relaxations that
a) a pain arose in most body parts as I tried to gently allow a letting go of tension in that part, like something I had to shake off, kinda like DOMS though also similar to the body tension pain I get as a certain kind of autistic person repeatedly failing a task,
n b) that any however much relaxed part very quickly subconsciously tensed up once again within seconds of my focus moving to a new part. chronic tension from 1) needing to tense for blood to better flow, n 2) trauma. I've had masseurs tell me my muscles fight back, n fwiw prolapse op from the EDS, n I get pregabalin for the tension pain
Its basically guided meditation with visualization, but you guide yourself. It does exactly this, but faster, once you master it. It also allows you to fall asleep quickly.
Search "stair step induction" for a quick example to try out.
You must learn to sit perfectly still with every muscle tense for long periods.
Various things will happen to you while you are practising these positions; they must be carefully analysed and described.
Note down the duration of practice; the severity of the pain (if any) which accompanies it, the degree of rigidity attained, and any other pertinent matters.
When you have progressed up to the point that a saucer filled to the brim with water and poised upon the head does not spill one drop during a whole hour,
and when you can no longer perceive the slightest tremor in any muscle; when, in short, you are perfectly steady and easy, you will be admitted for examination;
and, should you pass, you will be instructed in more complex and difficult practices.
- Aleister Crowley, Liber E vel Exercitiorum, 1911. https://hermetic.com/crowley/equinox/i/i/eqi01005