The theory behind how penis extenders work is very simple: they gradually stretch the penis through applied tension.
How does all this stretching lead to gains in penis length?
Well, there are several physiological processes at work, but the most important one is the effect on the penile ligaments at the base of the penis.
These ligaments – called the suspensory and fundiform – anchor the penis to the body. However, they also cause the penis to arch upwards behind the pubic bone.
Because of this internal arch, the external penile shaft isn’t as visible as it could otherwise be.
Fortunately, the ligaments are also relatively elastic and respond well to consistent stretching.
The upshot of all this is that penis extenders work by stretching these ligaments. As the ligaments stretch, the arch of the penis behind the pubic bone is reduced. And As the arch of the internally held penis reduces, more of the penile shaft hangs outside the body.
In many ways, penis extenders work just like uncoiling a piece of string.
That’s the theory at least.
But do penis extenders work in practice?
Although people are often skeptical, growing medical evidence actually backs up the claim that penis extenders really do work.
Over the past 15 years or so, study after study – many published in leading peer-reviewed medical journals – have reported positive results.
The medical data consistently reports similar results: men who use penile traction consistently for a combined total of approximately 1000 hours over 3 – 6 months achieve significant penile lengthening of around 25 – 30 percent.
The supporting medical evidence is so great in fact, that penile traction is to date the only conclusively verified method of non-surgical penis enlargement.
What’s more, those increases in penile length aren’t made at the expense of penile girth.
Whilst it’s true that increases in penile girth are sometimes minimal, the research has never reported a case of a patient experiencing penile thinning.
So, if you’re contemplating using penile traction, you can breathe a sigh of relief. Doing so won’t stretch your penis out like a thin, spindly piece of play dough.
The Mechanics of a Penis Extender
The basic mechanics of how penis extenders work are pretty simple: two elongation rods run down either side of the penile shaft, and are secured just behind the head.
Tension levels are then controlled through two processes: Firstly, by adjusting the length of the elongation bars so that they match your current maximum stretched penile length. Secondly, by adjusting the tension setting.
Medical grade penis extenders have multiple tension settings – and the secret to their effectiveness is that they apply the chosen tension level both precisely and consistently. The minimum is usually about 900 grams (suitable for a new user); whilst the maximum tension is typically about 1.5kg (built up to after a few weeks of use).
Those are the tension settings that have produced positive results in many medical trials.
However, of late, a few high power devices have hit the market. For example, the SizeGenetics extender (review) offers a maximum tension setting of 2.3kg (800 grams more than the standard maximum); whilst the Male Edge (review) device provides a massive maximum traction force of 2.8kg – enough to stretch the trunk of an African Elephant.
Perhaps not surprisingly, these more powerful devices – developed by the same medical companies – are reported to produce even faster length gains than those typically recorded in clinical studies.
Importance of Secure Attachment & Comfort
Much of the effectiveness of a penile extender is, as mentioned above, it’s ability to maintain consistent levels of precise tension to the penis hour after hour.
In order to do so, the device must also offer a secure form of attachment to the penile head.
Older devices used a simple silicone noose, which was used almost garote style to secure the device to the penis. Not surprisingly, this noose form of attachment can be both unreliable and uncomfortable.
Newer devices built by the forerunner in the field – DanaMedic – have replaced the silicone noose with a far more reliable multi-part attachment method including a ‘comfort strap’, which distributes pressure more evenly.
Thanks to this development in design, these newer devices – again SizeGenetics (review) and Male Edge (review)- are both far more comfortable to wear for extended periods and don’t suffer from the common problem of constant slippage, which can easily hinder progress.
The 1000 Hour Target
One thing all the research into penile traction has made clear is that wearing time per day is proportionate to the gains achieved. Those who wear the device for longer per day, make quicker gains.
It’s almost a game of numbers – with most of the research showing that gains of between 1 – 1.5 inch in penis length are made for every 1000 hours of wearing time.
Of course, the reliability of the attachment method, and the comfort of the device has a massive impact on usage. Many lower quality devices simply don’t stay in place sufficiently well to have any form of meaningful effect.
For this reason, using a medically certified penis extender that has proved to be both reliable and comfortable is essential.
Penis Traction Medical Research – An overview of the numerous medical studies that have now been performed into the safety and effectiveness of penis enlargement through the use of traction. Includes average results achieved by the test subjects and study summaries.
Type 1 Medical Devices – An introduction to the types of devices used in the above medical trials.
Product Comparisons – A closer look at the two leading devices: SizeGenetics and Pro Extender. The only penis traction devices to have been certified as ‘Type 1 Medical Devices’ and to have undergone extensive clinical research.