Manko007's road to big dick land

Well maybe not heat cycles as you are interpreting it but the end of my last campaign I was doing 3 separate stretch sessions, all with heat the first 5 to 10 min then letting cool down last 10. This was 3 different sessions throughout day, started with one session and worked my way up. Also tried to do ADS before each stretch session with similar heat cycle; like 10 min in, for 10 min and 10 min cooldown. I didn’t measure pre BPEL like an idiot but was at least 1/4 inch gain and probably closer to 1/2 in a month’s time.

Also, I’ve been thinking about thermal cycling while cycle stretching.

“Thermal fatigue is a fatigue failure with macroscopic cracks resulting from cyclic thermal stresses and strains due to temperature changes, spatial temperature gradients, and high temperatures under constrained thermal deformation. Thermal fatigue may occur without mechanical loads. The constraints include external ones (e.g., bolting load) and internal ones (e.g., temperature gradient, different thermal expansion due to different materials connected). Compressive stresses are produced by the bolting load at high temperatures, or generated in the material having high coefficient of thermal expansion. Tensile stresses are produced when the component cools, or generated in the material having low coefficient of thermal expansion. Thermal stresses are produced by cyclic material expansion and contraction when temperature changes under geometric constraints. A crack may develop after many cycles of heating and cooling. The failure indicator or criterion of thermal fatigue is usually strain rather than stress. Thermal fatigue life is determined mainly by material ductility rather than material strength.”

“Anisothermal fatigue can sometimes be more damaging than isothermal fatigue. Isothermal fatigue occurs when tension or compression cycles are imposed at a constant temperature. Anisothermal fatigue occurs when the component temperature and strain vary simultaneously.”

How about cyclic stretching and heating/cooling at the same time to create anisothermal fatigue? Would have to cool instanly via an icebag of some sort. It could be worth a try….

No studies that I could find where they vary the rate of temperature change from high to low on tendon/collagen/ligament. But collagen is more ductile than it is brittle or strong.

Essentially yes.

And yes that is what cycle means. 1 repetition essentially. Like at the gym, one rep. One stretch of 30seconds. Then release and rest for half the time. Repeat. 30 cycles would be 30 reps etc.

To determine your optimal stress load you want to start a log and record your BPFSL numbers. You need 3-4 BPFSL numbers depending how many sets you do. Some just take 2 BPFSL measurements, beginning and ending.

I use 4 because I do 1 precondition set. So before anything I take BPFSL 0. This is before starting. Say it is 21cm. Then I do preconditioning 30min at 3kg. I take BPFSL1. Let’s say it’s 21.3cm. This BPFSL 1 will be your elastic limit. Essentially this means you have taken the elasticity out. This can also be called the “toe region” part of the stress strain curve.

Then you do your 1st set. For me I do 20min hang. I used to do “static” hang for my macro cycles 1-3, which means continuous weight. I increased the weight as you can see in my spreasheet. However, now I will incorporate the cyclic stretching/hanging because of theory 2. So I do US and IR for 10min. Then I cyclic hang with weight up to 8kg so far this cycle 4 for 10min. After this set is done I take another BPFSL 2 measurement. Let’s say it is 21.5cm. This is already in the transition region of the stress strain curve. AKA the “elastic region” maybe even in “plastic region” a little. Who knows.

Then I do one last set I heat for 10min IR and US and then manual stretches 30 secs on 15 seconds off, which is about 12-13 “cycles” at max grip power. I use my other arms wrist to fulcrum the shaft as well. Then I take the last BPFSL 3 (or T3, t is for time) and lets say it is 21.8cm. This I believe is in the “plastic region”.

You can see the attached graph for reference.

The point between the toe region and the elastic region I believe is called the “knee”. So you can find out what your Knee point stress is, what your yield point stress is (point between elastic and plastic region) and use those stresses accordingly.

But you need to log your numbers so you know where you are operating in the curve. Otherwise you can’t find out your ideal stress.

To answer your last question, use both. Low stress to precondition, which means attain the elastic limit or knee point. Then up the stress to attain yield point. Then you can increase further to obtain the plastic deformation. I do 3kg, then 6kg, then manual stretch or 8kg.

Increasing the weight over the cycle based on studies of hysteresis has shown to move the curve to the right each cycle as well. But so has using the same stress. So I would just use the same stress because you can record it easily.

When you load up to your stress do so at a slow rate of 1% to 5%/s of max load to minimize stiffness when loading. This means if your max load is 10kg, do so in 1-5% increments. Let’s choose 5% because it is more practical. You would increase 0.5kg/s until you reach 10kg. This means it will take you 20 seconds to load to 10kg to minimize stiffness. I respect this principle particularly during my precondition and 1st set. Then I feel the stiffness is not important and for cyclic stretching the loading rate is quick, or as comfortable as I want.

Attached you can also see a graph of hysteresis, which is the effect that happens when you cycle load something.

Glad to be of service.

The precon I do most of the time just normal temperature. Sometimes i experiment the second half of the time with heat to further stress relax.

The cyclic hanging is quite tough ive found as the attachment with the bib is painful so to save you some pain I would just do cyclic manually. You can still do it before or after or both. Not sure what the best is but Kyrpa seems to be having great success doing after all his work as the last thing iirc.

I think my protocol is gonna look something like:
10min precon and then 10min precon with IR to further stress relax all at 2-3kg.Then 10min cycle manual stretch to further remove the stiffness, also helps with attachment pain after removing bib. Then 10min heated US at 6kg followed by 10min heavy hang at 8kg. Maybe cycle stretch 5min. Then one more set 10min US at 9kg and 10min no US to cooldown. Then manual cycles stretch 10min. And 10min jelq.

1hr 35min

Could cut all the times in half if session is too long, except for the precon part. Could cycle stretch in between hanging sets too to get rid of attachment pain and also further remove stiffness.

If cut all times in half except precon:

55min

The problem with the bib is you gotta take 5min off after each set to restore bloodflow. But we can cycle stretch in this point.

The benefit is we can load more weight and no blisters. But also painful as hell. I still havent figured out how to hang without pain and ive been using it for years. But its given me some decent gains so cant complain. Sometimes i can hang without pain and it is awesome but can never seem to replicate it.. hope you have better luck.

10min precon and then 10min precon with IR to further stress relax all at 2-3kg.Then 10min cycle manual stretch to further remove the stiffness, also helps with attachment pain after removing bib. Then 10min heated US at 6kg followed by 10min heavy hang at 8kg. Maybe cycle stretch 5min. Then one more set 10min US at 9kg and 10min no US to cooldown. Then manual cycles stretch 10min. And 10min jelq.

Glad to be of service.

The precon I do most of the time just normal temperature. Sometimes I experiment the second half of the time with heat to further stress relax.

The cyclic hanging is quite tough I’ve found as the attachment with the bib is painful so to save you some pain I would just do cyclic manually. You can still do it before or after or both. Not sure what the best is but Kyrpa seems to be having great success doing after all his work as the last thing iirc.

The problem with the bib is you gotta take 5min off after each set to restore bloodflow. But we can cycle stretch in this point.

The benefit is we can load more weight and no blisters. But also painful as hell. I still havent figured out how to hang without pain and I’ve been using it for years. But its given me some decent gains so can’t complain. Sometimes I can hang without pain and it is awesome but can never seem to replicate it.. Hope you have better luck.

Tissues stiffen as the loads increase and resist your efforts.

This of course before you are further on the stress strain curve, on the linear slope. As long as we operate on the the still stiffening part, in the realms of the transitional region we win nothing by increasing load.
Until certain load is exceeded stiffening eases and from this point forward tissues behave linearly and increasing load or time gives hanger similarly more elongation.

9 kg may be on the verge of the linear slope. But I dare to question it. Taking in consideration your conditioning with high loads due your hanging history.

Hangers should recognize this behavior because the more load you put still operating in the stiffening region, the more time you should hang for those penlie tissues to achieve certain strain.

My case is of course slightly different because not using constant load of 9kg, but it is anyways not enough to have linearly behaving elasticity achieved.
Tissues still stiffening meaning still operating in the stiffening part at the transitional region. Not yet in the proportional slope.

As you can see in the chart attached there is no difference in strain using 5kg, 6kg or ~9kg in similar fashion.

I would be very curious to see your stress strain curves with this procedure . With datapoints of each step

Manko,

My history: I’ve been doing vac and noose type hangers/stretchers on and off for more than a decade. The vac type (ADS, Vac Hanger, grip system, etc.) have allowed more weight and longer wear times than noose type (JES, Penimaster classic) I’ve tried them all, but I’ve been plagued by bruising, and occasional blistering especially when I try to increase the weight and time as you and others (Kyrpa) have done to achieve plastic elongation (albeit previously without heat/US, I now use US ). I recently (yesterday) tried the silicaps and toe protectors as recommended by others, but sure enough, still got bruising as soon as I tried to increase the weight - even with the wrap and the silicaps.

Maybe I just got lucky, but got the Bib Hardcore as you recommended, and just by chance used my coban wrap from 3M (buy in bulk 18 pack on amazon) on my unit, with nothing on the bib at all, just stock. I have always used the 4” coban to protect my glans from vacuum. I tear off a 5-6” piece, then strip it into two 1.5” pieces, and one 1” piece.

I wrapped one 1.5” piece tightly around my stretched unit, just behind the glans, them wrapped again in the same place with the other 1.5” piece, them one more 1” piece right behind the glans, then placed the bib about 1/4”-3/8” behind the glans. The indentations in the bib imprint into the coban excellently. No slippage. I think I could have ripped my dick off with 50+ lbs of weight. The only pain is when I tried to peel the coban off the inner layer as the adhesive is stuck to the skin.

But so far, the bib is infinitely better than any vac system I have tried. No pain during hanging at all. I know others swear by vac hangers, but maybe my unit is just too sensitive to vacuum, or maybe it is because I use 5-10g of Norwegian fish oil daily which makes me bruise a little easy, or it could be just because I am old (52 in a couple of months). The only downside is the bib covers about 1” more of my shaft then the Penimaster Pro, so I can’t heat my entire unit with US. But to be able to achieve high weight/stress without damage to my penis is the key to consistency, and consistency is the key to optimal results. So I am super excited. If you want me to send pics of how I wrap, let me know. Again, just staring the bib hanger, but I know this is going to work well enough so I can do yours/Kyrpas protocols here.

I usually can get to 2.2% strain with just 6kg i think but the problem is i can never pass that point if I dont increase the weight. Then 9kg already pretty linear to get to 2.9%.

Also i have this urge to blast past walls so i increase past 9kg even.. its a bad habit but i probably dont need to.

I just think that if i stay at 9kg and keep replicating the 2.9% that it wont go past my post bpfsl. Maybe its just a fear that if i dont increase past 9kg i will be wasting my time repeating 2.9% strain and stay stuck at same bpfsl.

Old habit from traditional hanging where one “must increase the weight” to keep gaining. Of course most stop gaining at 15lbs which so happens to be around 7kg. So maybe one really does only need to operate in the toe region and transition to gain.

But this depends on how thick ones cord is. I think my cord is quite thick so i may need to just hang 10min at 11kg instead of 9kg to reach your same level of 9kg. Who knows. I dont think i would be overconditioned as ive never hung past 9kg for more than a week last macro cycle and then taking 3 months should have deconditioned me plenty.

I will have to be more patient for sure seeing how you can manage to gain still at 9kg manual.