perzzon skrev:
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> Korsciterar lite:
>
> Erik Melin skrev:
> --------------------------------------------------
> -----
> > hehe! cykelblaskan aftonbladet:)
> >
> > kollade upp lite, finns tydligen en artikel
> från
> > 2004:
> > J Urol. 2004 Sep;172(3):1028-31.
> > Bicycle riding and its relationship to the
> > development of erectile dysfunction.
> > Taylor JA 3rd, Kao TC, Albertsen PC, Shabsigh
> R.
> >
> >
> > CONCLUSIONS: The overall prevalence of ED in
> the
> > cycling community does not appear to be greater
> > than that of historical controls. Previously
> > suggested alterations in riding habits may not
> > change the prevalence of ED among cyclists.
> >
> > Vet ej kvaliten på artikeln dock. intressant.
Den är internetbaserad vilket inte är så bra med tanke på urval,
från samma abstract (min fetstil):
MATERIALS AND METHODS: We performed an
Internet based survey of cyclists to examine factors associated with cycling that might contribute to ED as defined by the International Index of Erectile Function. A total of 688 cyclists were included in the analysis ranging in age from 18 to 77 years.
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Jag sökte på
PubMed med nyckelorden "impotence cycling" och hittade någran andra studier, slokande läsning...
Den här säger mer än 3h i sadeln per vecka är assoscierat med potensproblem, men att fler studier behhövs.
Does bicycling contribute to the risk of erectile dysfunction? Results from the Massachusetts Male Aging Study (MMAS).
Marceau L, Kleinman K, Goldstein I, McKinlay J.
An association between bicycling and erectile dysfunction (ED) has been described previously, but there are limited data examining this association in a random population of men. Such data would incorporate bicyclists with varied types of riding and other factors. Data from the Massachusetts Male Aging Study (MMAS) were utilized to examine the association between bicycling and ED. Logistic regression was used to test for an association, controlling for age, energy expenditure, smoking, depression and chronic illness. Bicycling less than 3 h per week was not associated with ED and may be somewhat protective. Bicycling 3 h or more per week may be associated with ED. Data revealed that there may be a reduced probability of ED in those who ride less than 3 h per week and ED may be more likely in bikers who ride more than 3 h per week. More population-based research is needed to better define this relationship.
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En till studie som visar på samband.
Impotence and genital numbness in cyclists.
Sommer F, König D, Graft C, Schwarzer U, Bertram C, Klotz T, Engelmann U.
Department of Urology, University Medical Center of Cologne, Germany. Frank.Sommer@uni-koeln.de
Cyclists often complain of genital numbness and even of impotence. The purpose of this study was to determine if perineal compression during cycling causes changes in the penile blood supply, impotence and penile numbness. Forty healthy athletic men with a mean age of 30 +/- 5.3 years took part in the study. Transcutaneous penile oxygen pressure was obtained using a device consisting of a modified Clark pO2 electrode, attached to the glans of the penis. All men were measured in a standing position before, in a seated and standing position during and in a standing position after cycling. Additionally, a detailed interview was carried out with each man. The penile blood supply--which correlates with the transcutaneous PO2 at the glans-- decreased significantly in over 70% of the test subjects during cycling in a seated position. Cycling in a standing position did not show any alteration in the penile blood supply as compared to the values measured before exercising. Numbness of the genital region was reported by 61% of the cyclists. 19% of cyclists who had a weekly training distance of more than 400 km complained of erectile dysfunction. The results of the present study showed that there is a deficiency in penile perfusion due to perineal arterial compression. This could be a reason for penile numbness and impotence in long-distance cyclists. Therefore, we suggest restricting the training distance, and taking sufficient pauses during the course of prolonged and vigorous bicycle riding, in order to avoid penile numbness and impotence.
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Och en tredje säger att sadeln är viktig för att bibehålla "penistrycket".
Cycling and penile oxygen pressure: the type of saddle matters.
Schwarzer U, Sommer F, Klotz T, Cremer C, Engelmann U.
Department of Urology, University Medical Center of Cologne, Germany.
OBJECTIVES: Temporary genital numbness is a common side effect of long-distance cycling; cases of impotence have even been reported. Recent reports have shown that perineal compression leads to a decrease in penile blood flow. Reduced oxygen tension leads to penile fibrosis, which works counterproductively to the achievement of an erection. The shape of the bicycle saddle could be a factor affecting penile perfusion. The aim of this study is to find out the influence of different saddle designs on penile perfusion. MATERIAL AND METHODS: In 20 healthy athletic young men (mean age 26.8 years, range 21-31 years) without history of erectile dysfunction, transcutaneous oxygen pressure (PtcO2), which correlates with arterial and tissue PO2, was measured at the glans of the penis using a transcutaneous measurement device. All men were measured in a standing position before cycling, then during cycling in a seated position on a stationary bicycle. Four different bike saddle designs were used: (A) narrow heavily padded seat; (B) narrow seat with medium padding and a V-shaped groove in the saddle nose ("body geometry"); (C) wide unpadded leather seat; (D) women's special wide seat with medium padding and no saddle nose. RESULTS: During cycling in all seats a decrease in penile oxygen pressure could be observed, reflecting perineal compression. But the differences were unexpected: seat (A) mean PtcO2 11.8 mmHg, decrease in initial oxygen pressure 82.4%; seat (B) mean PtcO2 20.8 mmHg, decrease in initial oxygen pressure 72.4%; seat (C) mean PtcO2 25.3 mmHg, decrease in initial oxygen pressure 63.6%; seat (D) mean PtcO2 62.3 mmHg, decrease in initial oxygen pressure 20.3%.
CONCLUSIONS: Cycling in a seated position leads to a compression of perineal arteries with a consequent significant decrease in penile perfusion. But, there are unexpected differences between different saddle types. It was possible to demonstrate that the most important factor in safeguarding penile perfusion is not the amount of padding, but rather a saddle width which prevents sufficiently the compression of the perineal arteries.
