Mechanically Activated Stretch Reflex (M.A.I.R) Exercises

[INS]

I'll read the lengthening surgery study.

[INS]

I actually want growth like this in the penis (I'm using example of Limb lengthening here)

Muscle response to leg lengthening during distraction osteogenesis - Thorey - 2008 - Journal of Orthopaedic Research - Wiley Online Library

Histology and ultrastructure of arteries, veins, and peripheral nerves during limb lengthening. - PubMed - NCBI

Behavior of blood vessels during lower-leg lengthening using the Ilizarov method. - PubMed - NCBI

They show how with bone lengthening even the blood vessels and nerves and muscles grow. However too high rates of lengthening show fibrosis (which is why I'm not after quick gains)

[marinera]

Even without fibrosis, quick gains (so high forces, basically) will likely give premature toughening of tunica. The penis reacts to the excessive force becoming stronger, instead than longer.

Cyclic stretching is more likely to cause either strengthening or injury (depending on the specific value of variables, of course) more then lengthening, so I find strange that the OP recommends JAI stretches.

I do agree with him (for completely different reasons, though) that hanging is not the way to go, at least not with clamp style hangers, because it is more like cyclic stretching than steady, stress relaxation based stretching. A vacuum hanger allows longer sets, so it is better, but why not using an extender then.

Girth exercises are the ones more likely to cause fibrosis, because they can create a high amount of force often unevenly distribuited. I don't think fibrosis is that common among PEers though, at least not at a significative level.

[BigO]

Thank you gentlemen for making this into a very productive and educational thread.

[INS]

What's the effect of modifying the tunica on the Glans and spongiosum?

[The Kidd]

Dear God children. I leave you all alone for a few days and it all turns into complete chaos!

[phallic1]

Lol...it's discussion like this that brings me back to the boards. Good stuff guys!

[marinera]

What's the effect of modifying the tunica on the Glans and spongiosum?

The tunica albuginea is very elastic on the glans, which explains how the glans can expand a lot immediately, while it is hard to get permanent enlargement of it. The glans is feeded of blood via CS, where there is only the inner layer of tunica albuginea (which allows girth-wise expansions) while the outer layer (which allows length-wise expansion) is absent.

So, enlarging the tunica albuginea of the glans would make it more easily stretchted in both directions I guess, where expanding the tunica albuginea of the CS would make easier to expand in girth.

This structure could explain why priapism, clamping and pumping have more effect on girth than length, which would be otherwise hard to explain, since everytime you clamp the penis pressure should grow in every direction (even more when pumping).

This also would have as a consequence that upward strecth/hanging is ineffective for length gains; I think there is anecdotical evidence of this being the case too. It could give girth gains though, because the inner layer is more stretched in this position, and should be able to expand more girth-wise with time.

This structure of the penis cans shed some light, IMO, on why hangers get base girth gains; the CS is more prominent at the base, and the combination of stretching and restricting blood in CS will make the inner layer grow; since the inner layer is only responsible for girth expansion, the effect is base girth gains (hope it is clear, it is not easy to explain for a not ENS).

A couple of papers on TA structure:

Human penile tunica albuginea: Anatomy discovery,
functional evidence and role in reconstructive and
implant surgery
Geng-Long Hsu1,3*, Cheng-Hsing Hsieh2 and Shyh-Chyan Chen3
1Microsurgical Potency Reconstruction and Research Center, Hsu’s Andrology, 3F 88, Wen-Hu Street, Neihu District,
Taipei, Taiwan
2Department of Urology, Taipei Tzuchi Hospital, New Taipei, The Buddhist Tzuchi Medical Foundation; School of
Medicine, Buddhist Tzu Chi University, Hualien, Taiwan
3Department of Urology, National Taiwan University Hospital, College of Medicine, Taipei, Taiwan
Accepted 09 December, 2014
In the human penis the corpora cavernosa (CC) is a hydralic system which can anatomically be
assorted into the smooth muscle and skeletal muscle components. The former includes CC
sinusoids and vasculature while the latter are bulbocavernosus, bulbospongiosus, tunica albuginea
(TA) and distal ligament. Rigid erection is a result of interplaying two components via healthy
supplying arteries and draining veins. Clinicians believed TA to be a single layer before 1991 when a
model of a bi-layered structure was discovered as a 360° complete inner circular layer and a 300°
incomplete outer longitudinal layer which is absent bordering the CC and corpus spongiosum. In the
erection process the outer longitudinal layer plays a pivotal role in closing the emissary veins, which
ascertain veno-occlusive mechanism. Although this peculiar design is considerable for allowing
ejaculate passing, it is vulnerable to dilator trauma during penile implantation....

Global Advanced Research Journal of Medicine and Medical Science (GARJMMS) (ISSN: 2315-5159) Vol. 3(12) pp. 400-407,
December, 2014 Special Issue
Available online http://garj.org/garjmms/index.htm
Copyright © 2014 Global Advanced Research Journals



J Urol. 1997 Jan;157(1):276-81.
The anatomy of the tunica albuginea in the normal penis and Peyronie's disease.

Brock G¹, Hsu GL, Nunes L, von Heyden B, Lue TF.

Abstract

PURPOSE:

We studied the fine architecture of the tunica albuginea of the penis.
MATERIALS AND METHODS:

The study included 6 human male cadavers and 10 surgical patients (5 with Peyronie's disease and 5 with normal penile anatomy).
RESULTS:

The tunica albuginea of the corpora cavernosa is a bi-layered structure with multiple sub layers. Inner layer bundles support and contain the cavernous tissue and are oriented circularly. Radiating from this layer are intracavernous pillars acting as struts, which augment the septum and provide essential support to the erectile tissue. Outer layer bundles are oriented longitudinally. These fibers extend from the glans penis to the proximal crura, where they insert into the inferior pubic ramus. There are no outer layer fibers between the 5 and 7 o'clock positions. Elastic fibers normally form an irregularly latticed network on which collagen fibers rest. In Peyronie's disease the well ordered appearance of the collagen layers is lost: excessive deposits of collagen, disordered elastic fibers and fibrin are found within the region of the plaque.
CONCLUSIONS:

The normal 3-dimensional structure of the tunica affords great flexibility, rigidity and tissue strength to the penis, which are lost consequent to structural changes in Peyronie's disease.



The anatomy of the tunica albuginea in the normal penis and Peyronie's disease. - PubMed - NCBI

This is also not bad, although a bit outdated
Anatomy of the Human Penis: The Relationship of the Architecture Between Skeletal and Smooth Muscles - Hsu - 2013 - Journal of Andrology - Wiley Online Library

[Pegasus]

Ok marinera why do you believe this?

Cyclic stretching is more likely to cause either strengthening or injury (depending on the specific value of variables, of course) more then lengthening, so I find strange that the OP recommends JAI stretches.

[marinera]

You just have to observe what happens in athletes or workers; for example runners have a number of tendon injuries and tendinopaty way higher than gymnasts, dancers or even weightlifters. Also inflammations to hands, wrists and fingers are pretty common among those who make repetitive movements at low forces but for a high number of times, like typists to say one.

It also makes sense because it doesn't allows for strain stress relaxation to take place; so, every time the connective tissue is stretched, even with little strain or force, it is a small shock or break; with comparable forces, cyclic stretch will cause more damage than static stretch, so in the end the strain will be bigger through static stretch than cyclic stretch. Look at contorsionists, do they do a high number of stretches or do slowly try to get their body in the position they want to achieve?

I suppose though you want some kind of scientific backup. Too late at night to search it now, but I will do when I will log again. maybe even tomorrow.