As has long been known as a bike the great country of China, people may have never thought about cycling and men with erectile dysfunction (ED) should exist between a tenuous relationship, the authors summarized the international medical journal latest 3 article, hoping to cause public concern, and related professionals can expand on seriously in order to prevent or eliminate potential or actual adverse impact exists.
Historical review of the
Over the past 20 years, gradually began to concern foreign bike and men with erectile dysfunction are, in fact, the perineum oppression and men with erectile dysfunction problem of mutual relations.
Of course, this is not a new topic, or even ancient medical scientists have long noticed this problem, but then there is no bike riding and horse riding is available. Approximately 4 century b.c., Xin Yisheng Hippocrates was reported long-term continuous riding expeditions led by perineal pressure on men's sexual intercourse is unfavourable, the many SN Jussieu's impotence, there are still important figures.From 1981 began some case reports that most start reports a 46-year-old man in continuous riding 290 km of bike after penile numbness and tactile stimulation of the mild reactions, doctor shortage took note of his bike is the Western standard, narrow, rigid leather car seats.
Since then until 1998 and have reported similar cases and a total of 13 pieces of research reports, reports of symptoms including long cycling dysuria, examination found Balanitis and penis remote touch, temperature sensing, vibration sensing sensitivity declining or disappear, sexual function, such as sexual decline. It is worth noting that from 1999 to 2004 from sexual medicine, urology and Cardiovascular Division, Department of Neurology, sports medicine, emergency medicine, different clinical disciplines, as well as biomedical engineering experts published by bike and men with erectile dysfunction article to increase dramatically, for a total of 21 articles.United States Boston University School of medicine, Department of Urology Institute since the 1980s began to engage in research in this field, then come to ask for the reconstruction of penile arteries surgery patients whose ED often provide such history: they tend to have long-term bike after perineal numbness or Perineal Trauma history, their own young began to pay attention to when ED issues.
But also in professional cycling sports players, weekend bicycle bike enthusiasts, static bicycle fitness who people report symptoms of chronic perineal oppression. Bold and cheeky cyclist and bicycle prepubertal beginner beginners also because fall sitting in the car seat tips or beam caused acute on the perineum constriction injury. Has long been concerned about the topic of the different disciplines of health care workers, including the United States national institutes of health professional and secure health project staff, including professional bike racers and riding motorcycle police, the objective of the study is to ride and ED a causal relationship exists between. Epidemiological studies have shown that did exist between the different levels of relationships, including case report (low level of evidence), study or series of small sample group study, patients with matching research, and population-based epidemiological studies (the highest level of evidence).For the organizational structure of the study of Physiology
We know that when the people sit in a small bicycle seat per unit area to bear weight is sitting in the Chair's 7 times, because the Chair consists of thighs and buttocks are also able to share their own weight.
Such research is essential to the above two related variables that might exist between providing a of Pathophysiology underlying theory of interpretation, the crux of the matter is that when the car seat on the bike the perineum of excessive oppression that pressure on the perineum is more than the systolic blood pressure in the arteries, the blood supply to the penis temporarily interrupt occurs, in this case, the arterial vascular endothelial are subject to different degrees of injury, which led to the occurrence of vascular ED, so why such outcomes? actually only two possible explanations:The first is a perineal pressure causing penis hemodynamic changes — as early as 1982 a doctor first Doppler ultrasound technology to 20 men riding a bike before, during and after the ride, the upper arm and ankle of penile blood pressure for determination, is designed to explore by bike on penile blood flow by injury.
Results indicate that use no padding of the buggy ride 5 minutes later, the penile blood pressure was on average 50 mmHg (from 8 to 126 ± 76 ± 9), but the ankle and upper arm blood pressure during the study did not change. The heavier weight, blood pressure decrease penis. While blood perfusion often lack causes the cavernous tissue fibrosis. In 1999, it was a similar technique using different types of car seats on penile blood flow, the results show that the Strip without liner saddle allows maximum per second flow drop by nearly 40% of the speed, and adding a gasket of seats approximately 18% only. The skin for the determination of 25 health man penis penis blood oxygen partial pressure, stand 61.4 ± 7.2 mmHg, bike 3 minutes down to about 70%, only 19.4 ± 4.7 mmHg. But men to stand pedalled will not happen, because the perineum is no longer subjected to oppression. Bike stand after about 10 minutes after the blood pressure basically can be restored to normal levels.Research shows that a narrow saddle front-end although only bear the weight of 22%, but because of its surface area is small, the perineal area of organizations (including blood vessels and nerves) pressure is very large, approximately 120 mm of mercury.
General car seat makes the blood flow to the penis, only 70% reduction for women-crafted no strip on the front of the wider seats with minimal impact on blood flow, only 20% decline. It seems to ensure that the penile blood flow by the most important safety factor is not a gasket thickness degree, but its width,-width block can effectively support the pelvic bones and increase overall contact area, thus avoiding the perineal body of oppression.Researchers also conclude that some meaningful results: If the man riding a bike is to keep the body and the car seat 90 ° corner instead of a 60 ° angle, penile blood oxygen partial pressure will increase by 40%
。The car seat in filling gel-like substance instead of filling foam sponge substances, penile blood oxygen partial pressure will increase by 40%, and the body maintain 90 ° or 60 ° or, demonstrating the filling gel-like substance, it really can be more efficiently distributed pressure on the perineum, relieve the penile blood vessels and nerves.
When the car seat forward 10 ° angle downward, the car seat front end pressure will decrease when compared to the level of 44%; on the contrary, when the car seat forward 10 ° angle on the elevation, the car seat front end pressure will increase when compared to the level of 62%.
The second is the influence of the neural conduction — using skin feeling threshold determination method checks the 10 21-26-year-old health man, found them in bike 20 minutes after penile skin sensitivity decreased significantly, perception threshold increased 116%, perineal oppression that was blocking the nerve conduction.
Case report
Case report of cases mentioned earlier, but Interestingly these men ED symptoms after treatment upturn to bike ED will recur.
Although the scientific value of these cases was limited, but it is the case attracted widespread attention and for further in-depth study provides basis.No control group study of series
Norway has 260 participating 540 km bike cross-country runners for investigation, the results indicate that this is no control group's series of observation research end of 160 people: 33 people (21%) reported penile numbness, insensitive or sensitivity loss, these symptoms last more than 1 week have 10 people; there are 21 (13%) report of the ED, 11 weeks, there are three people going on for several months.
Players reported that the extent of the penile numbness and cycling distance/time proportional. Interestingly once happened penile numbness, these riders were inclined to recurring such neural symptoms. Another study is for 81 long-term continuity of purpose by bike, bike and also evaluate ED exists between some related relationship. These riders ride time of age, and how are different, different cycling way in accordance with article summed up the results of the various symptoms appear, the investigation has shown that in weekend cycling accounted for 41%, prepubertal beginner riders in occupies 30%, commuting by bicycle in occupies 22%, static bicycle fitness in occupies 20%, defying mountain bike in occupies 10%. Although these observations no control group, but continues to further study provides some basis.The pairing of
Initial pairing study findings were Boston University researchers in 1997 in the United States Department of Urology at the annual report, they investigated 738 name average age 44 years of bike club members and 277 is not riding the average age of the control group were compared, the result shows that bike Group's ED 4.21 per occurrence, no riders 1.12% with significant differences.
To exclude multiple factor analysis with vascular risk factors of age, a bike with moderate and severe ED relationship with independent. Another study compared the 1786 amateur cyclist (100-400 km/h/week, with an average age of 42 years old) and local club 155 active long distance swimming enthusiasts (average age 31 years), the former ED rate is 4%, which is 2%; riders according to age, cycling distance and training time group appear perineal numb proportion in 58% to 70%. In 2002 a 17 motorcycle police and matched control group tumescence monitoring results showed that the incidence of the former tumescence 27.1% 42.8%; also show nocturnal tumescence incidence increases as the riding time and further reduced.In 2004 a 463 320 km bike race of men until no ED prospective as well as the results show that after 1 week and 1 month is the cumulative incidence of ED respectively 4.2 1.6 percent.
Cycling in perineal numbness of accounted for 31%. These pairs of information for the first time, allow people to be able to ride a bike with no crowd to ED.(Practice editing: Li red)
No comments:
Post a Comment