Now to the "embarrasing" stuff
Customers have called us up and told us that after they started using the PowerCranks they found their erectile dysfunction being treated. Before laugh yourself a hernia let me say there is an actual theoretical reason why this might occur. The first customer who informed us of this possibility was a urologist, a specialty that deals with this condition all the time, so he should know, right?
It is well known that people who exercise have better erectile function or less erectile dysfunction. Why might this be? It turns out that erections are caused by the parasympathetic nervous system relaxing the muscles that control blood flow to the penis. It also turns out that the parasympathetic nervous system is different than what we think of as normal nerves and in most instances it is distributed following the blood vessels and not in large distinct nerves (like the motor nerves to our muscles or sensory nerves to our skin) and it is not very well localized. The reason this is important for this issue is it turns out that the blood vessel that supplies the penis is very close to the blood vessel that supplies the hip flexor (iliopsoas) muscle. Training of any muscle "develops" the parasympathetic stimulation to that muscle to help it relax. The best example of this we are all familiar with is the slowing of the heart as we get better trained. When we train and the function of the heart improves, the increased concommitant increased parasympathetic stimulation causes the heart to relax better, increasing stroke volume, and decreasing the resting heart rate when we are at rest. So, as we better exercise the hip flexor muscles we might also expect that this might lead to better parasympathetic innervation not only to the iliopsoas muscle but also spilling over some to the penis, and better erections, explaining what has been reported to us.
So, even though it might seem like we are snake oil salesmen, claiming that this one product can make you cycle faster, run faster, avoid injury, better rehab from injury, and have better erections, it turns out that there is a theoretical explanation to all of these outcomes. :-) And if you are suffering from this problem I suspect you don't find it funny so we are letting you know of the possibility of this secondary benefit.