Does an All Day Stretcher Work?
No study has tested an all day stretcher by itself, and we won't pretend one has. What the studies do show is that traction grows length when men wear it for many hours a day, and an all day stretcher is the easiest way to get those hours.
Up to 9 hours a day
+1.7 cm in 3 months
23 young men wore a traction device 4 to 6 hours a day for 2 weeks, then 9 hours a day. Flaccid and stretched length both rose about 1.7 cm.
Free abstractJournal pagePMID 20102448
At least 4 hours a day
+1.7 cm stretched in 6 months
Men wore a traction device at least 4 hours a day for 6 months. Flaccid length rose 2.3 cm and stretched length 1.7 cm. Girth did not change.
Free abstractJournal pagePMID 18990153
4 to 6 hours a day
+1.2 cm erect in 6 months
54 men wore a traction device 4 to 6 hours a day. Erect length rose 1.2 cm and held for the 3 months they were followed after stopping.
Free abstractJournal pagePMID 25809129
More hours, more change, Peyronie's
2x the straightening over 6 h a day
In a controlled trial of men with a curved penis, those who wore traction over 6 hours a day straightened about twice as much as those under 4 hours. Stretched length rose 1.8 cm.
Free abstractJournal pagePMID 30365247
These studies used extenders, not all day stretchers. They show that more hours under traction did more. Read every study on our clinical studies page.
Can an All Day Stretcher Replace an Extender?
It can get you some length on its own, but it works best as the second half of a routine. A randomized trial found that 30 to 90 minutes a day of higher-tension traction grew length too, so the extender session does the heavy lifting and the stretcher adds hours on top.
Both will deliver better/faster gains but you should gain some length with 5hrs in the ADS.
Coach Chaswood, asked if the ADS can replace an extender
That is why our coaches tell beginners who only have a stretcher to add an extender when they can, and men with a busy day to use the stretcher on the days the extender doesn't fit.
How Much Length Can You Gain?
In the traction studies above, men gained about 1.2 to 2.3 cm, roughly half an inch to an inch, over 3 to 6 months of daily wear. In our PE Trainer app, where men log their extender and stretcher time, men who measured a year in gained a typical +0.47 inches. The top 10% gained +1.02 inches or more, and 80% measured some gain.
107 men in the PE Trainer app, self-measured bone-pressed erect length, about 12 months apart. See month by month results in penis extender before and after.