Please understand we are making no specific medical claims here as what we have observed and hypothsized has never even been scientifically studied. But, we have had reports from users that they have seen improvement in their erections after starting use of PowerCranks. This in already well-trained older athletes, people wh should already have a lower risk of erectile dysfunction. (article1 article2) How could this be?

Penile erections are caused by the firing of the parasympathetic nervous system that causes the relaxation of certain muscles allowing blood to flow into the penis to increase the pressure there which makes it "rigid". While many physical issues can cause erectile dysfunction, one source is most probably and simply a sedentary life style. Many studies have shown that erectile dysfunction occurs less frequently in men who run or or otherwise active, although it still occurs in many athletes as they get older. Improvement in those who should already be "protected" because they are active suggests that even more can be done. We hypothesize this is because even athletes doing normal activity tend to under-utilize the groin muscles, allowing them to "deteriorate" to an extent. As this occurs, the parasympathetic tone in this area will deteriorate with them. If one can prevent the deterioration of or restore the parasympathetic tone to the groin normal erectile function might return. Well nothing better exercises the hip flexor muscles than exercise with PowerCranks and so, nothing would be better at restoring normal parasympathetic tone to this area than exercise with PowerCranks. Hence, if the source of the erectile dysfunction is poor parasympathetic tone in the groin region, we would expect regular exercise with PowerCranks to completely reverse this problem. Such improvement should occur within 6 to 8 weeks, well within our 3 month money-back guarantee. If you suffer from erectile dysfunction and are interested in trying to treat this problem while, at the same time, improve your physical conditioning, you should consider PowerCranks. Most people can even exercise with PowerCranks even if they have bad knee joints from arthritis or old injuries. If you are not exercising regularly now you should consult with your physician to make sure it is safe for you to embark on an exercise program before embarking on training with PowerCranks.