Prostrate cancer and cycling

Hello moderator - please can you delete this post for me. I went through the FAQ and it seems to only allow replies to posts to be deleted.

Thanks.

dannyfrankszzz said:

Hello moderator - please can you delete this post for me. I went through
the FAQ and it seems to only allow replies to posts to be deleted.

Danny, this is a Usenet news group.
You are using cyclingforums.com which is a Web-based front end to this
group. I'm sorry to say it, but your post has been distributed to nntp
servers across the internet.
I don't know the answer to your question, sorry.

John Hearns said:

dannyfrankszzz said:

Hello moderator - please can you delete this post for me. I went through
the FAQ and it seems to only allow replies to posts to be deleted.

Danny, this is a Usenet news group.
You are using cyclingforums.com which is a Web-based front end to this
group. I'm sorry to say it, but your post has been distributed to nntp
servers across the internet.
I don't know the answer to your question, sorry.

And if he had used a newsreader and Usenet he could have cancelled the
message himself.

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

dannyfrankszzz said:

Here's one for the paranoid but I recently heard that there might be a
link with prostrate cancer and cycling. Just wondered what the
consensus is on this and what people do to offset concerns over this.

If the group is interested I can find out a bit more. Neighbour and
good friend is a local consultant who specialises in prostate cancer.

In fact I may just enquire ANYWAY !

Jack Ouzzi said:

dannyfrankszzz said:

Here's one for the paranoid but I recently heard that there might be a
link with prostrate cancer and cycling. Just wondered what the
consensus is on this and what people do to offset concerns over this.

If the group is interested I can find out a bit more. Neighbour and
good friend is a local consultant who specialises in prostate cancer.

In fact I may just enquire ANYWAY !

The answer would seem to be no (prostate specific antigen is the prime
prostate cancer marker in blood)

Herrmann M, Scharhag J, Sand-Hill M, Kindermann W, Herrmann W.
Long-distance mountain biking does not disturb the measurement of total,
free or complexed prostate-specific antigen in healthy men.
Clin Chem Lab Med. 2004 Mar;42(3):347-9.

Luboldt HJ, Peck KD, Oberpenning F, Schmid HP, Semjonow A.
Bicycle riding has no important impact on total and free
prostate-specific antigen serum levels in older men.
Urology. 2003 Jun;61(6):1177-80.

R. A. Swain; N. Montalto; D. Ross
The effect of long-distance cycling on the prostate-specific antigen level
Arch Fam Med. 1997 Sept;6(5):500-502.

Crawford ED 3rd, Mackenzie SH, Safford HR, Capriola M.
The effect of bicycle riding on serum prostate specific antigen levels.
J Urol. 1996 Jul;156(1):103-5.

as one might expect given the number of cycle rides in aid of Prostate
Cancer Charities.

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

"dannyfrankszzz" <[email hidden]>
wrote in message
news:[email hidden]...

Quoted message said:

Here's one for the paranoid but I recently heard that there
might be a link with prostrate cancer and cycling.

One of the standard initial tests for prostate cancer is PSA (prostate
specific antigen) in the blood. The other is physical examination.
If these give a positive then a tissue biopsy may follow - (just tiny
hollow needle type widgets, which take a small tissue sample.)

There is some anecdotal evidence, that regularly riding a bike
more especially on a hard saddle (maybe) can elevate PSA readings
over the lower threshold. This may be important because after a
particular age, a PSA screening may be added to the battery of
blood tests included in the standard check-up - so the person might
not be given any notice of the inclusion of PSA screening.

Also many doctors , even specialists it would seem aren't too clued
up, even about the anecdotal linkage between elevated PSA and cycling.
So in the absence of any other indicators - a positive digital
examination for instance where further discussionn would be out of
the question in any case - it might be worthwhile pointing out the
possible link, and suggesting a further blood test in a few months
time. Before moving in to a biopsy. Which is not only inconvenient
for the patient but may cost the taxpayer a few hundred pounds
unnecessarily.

As I said, the evidence is mainly anecdotal, although it can be
confirmed loosely from experience.* Staying out of the saddle,
or adapting the riding style for a minimum of four weeks prior
to a sampling for PSA should be sufficient to cancel out any
elevating effect if it exists. Although ISTR one doctor gave
me a figure closer to eight weeks. Although whether he was
being ironic, in the face of my fund of recently acquired anecdotal
knowledge, I wasn't too sure at the time.

Over the age of 50, PSA readings can give up to 75%-80% false
positives, so its worth avoiding unnecessary biopsies which
might be ordered as a result of a misleading high reading.

ISTR There may be some evidence that cycling can lead to an
enlarged prostate but this isn't dangerous in itself, although
maybe inconvenient.

michael adams

*judging by the quality of some of the anecdotal medical
information on NewsGroups, I'd have been inclined to disbelieve
it, if it wasn't for personal experience. The factual
information from reputable sources is another matter.

....

Just wondered what the

Quoted message said:

consensus is on this and what people do to offset concerns over this.

--
dannyfrankszzz

michael adams said:

As I said, the evidence is mainly anecdotal, although it can be
confirmed loosely from experience.*

See the list of research papers I posted above which show your anecdotal
evidence is wrong. Cycling does not lead to elevated PSA levels. As
for prostate cancer then cyclists do get it but then again since one in
three men over 50 will have some traces of prostate cancer its hardly
surprising.

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

in message <[email hidden]>,
dannyfrankszzz ([email hidden]'😉

Quoted message said:

Here's one for the paranoid but I recently heard that there might be a
link with prostrate cancer and cycling. Just wondered what the
consensus is on this and what people do to offset concerns over this.

I don't normally reply to Cycling Forums people, but this one seems
reasonable...

Badly designed bicycle saddles can cause damage to the plumbing in your
groin, leading to all sorts of nasty things like erectile disfunction
and, allegedly, an increased risk of prostate cancer. Women suffer
slightly different but equally unpleasant damage from poorly fitting
saddles.

The problem is pressure on soft parts of your anatomy that aren't
designed to take pressure. The solution is a saddle which supports you
under your ischeal tuberosities or 'sit bones', the big boney lumps on
the back of your pelvis, and /nowhere/ /else/. What this means is that
the saddle has to be very firm indeed, and the right width for you.
Different people differ, and a fat person doesn't necessary have wider
spaced sit bones than a thin person. 'Specialized' dealers now have a
device to measure the width of your sitbones, and it really works.

FWIW the saddles I'd recommend are Brooks leather saddles, which are very
firm, very comfortable, but, alas, somewhat heavy; or the Selle Italia
SLR series (apart from the XP 'extra padding' model) which are very
firm, very comfortable, and extremely light.

Do not make the mistake of using a 'gel' or padded saddle. Your sit bones
sink in, and your weight is distributed over your whole groin area.
Initially this feels comfortable, and if you only ever do occasional
short rides it may be OK. But in the long term it's going to injure you.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/
Das Internet is nicht fuer gefingerclicken und giffengrabben... Ist
nicht fuer gewerken bei das dumpkopfen. Das mausklicken sichtseeren
keepen das bandwit-spewin hans in das pockets muss; relaxen und
watchen das cursorblinken. -- quoted from the jargon file

"Tony Raven" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

michael adams said:

As I said, the evidence is mainly anecdotal, although it can be
confirmed loosely from experience.*

See the list of research papers I posted above which show your anecdotal
evidence is wrong. Cycling does not lead to elevated PSA levels.

Mere lists mean nothing and don't show anything.

The very fact that you seem to think its possible to "prove"
absolutely anything by posting a list of headings of Papers on
a NewsGroups - without even having the courtesy of providing any
URL's - only two of which appear to support your hypothesis in
any case, shows how much credence anyone can place in your understanding
of what the papers actually demonstrated. Or didn't as the case
may be.

I presume the papers quoted sample sizes, and the respective time
intervals between the actual sampling and the last time in the
saddle ?

Were they taken immediately after getting off the bike for instance?

Have there been any studies on such questions, do you know?

As you're clearly very familiar with the subject I'm sure you'll
be able to provide the comprehensive answers that would seem to
be required.

....

Quoted message said:

As
for prostate cancer then cyclists do get it but then again since one in
three men over 50 will have some traces of prostate cancer its hardly
surprising.

....

That's not what's in question.

It's maybe just as well nobody is likely to take your citations
of the earlier papers, regarding elevated PSA among cyclists on trust
then, isn't it ?

The question under consideration, is what proportion of male cyclists,
on autopsy at any age, are shown as having had prostate cancer at 50,
and at what stage, as compared with the general male population at 50
as subsequently examined on autopsy.

As cycling behaviour doesn't normally feature in medical records
except possibly in repect of injuries, the difficulties in compliling
such information shouldn't need too much explanation.

For most people, at least.

michael adams

....

Quoted message said:

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

michael adams said:

Mere lists mean nothing and don't show anything.

No but the papers in the list do. You can always go an read them if you
want - that's how citations work.

Quoted message said:

The very fact that you seem to think its possible to "prove"
absolutely anything by posting a list of headings of Papers on a
NewsGroups - without even having the courtesy of providing any URL's
- only two of which appear to support your hypothesis in any case,
shows how much credence anyone can place in your understanding of
what the papers actually demonstrated. Or didn't as the case may be.

Only two?

Int J Sports Med. 2005 Jan-Feb;26(1):79-81.
"We hypothesize that neither a heavy and regular physical exercise nor
the extensive and prolonged mechanical involvement of the prostate
region by the bicycle riding have significant influence on release of
both PSA and fPSA."

J Urol. 1996 Jul;156(1):103-5.
"CONCLUSIONS: There is no statistically or clinically significant
increase in PSA after bicycle riding."

Clin Chem Lab Med. 2004 Mar;42(3):347-9.
"CONCLUSIONS: In healthy men the measurement of tPSA, fPSA and cPSA is
not disturbed by preceding long distance mountain biking or endurance
exercise."

Urology. 2003 Jun;61(6):1177-80
"CONCLUSIONS: Physical activity combined with perineal pressure as
induced by a 13-mile bicycle tour has no diagnostic impact on PSA values"

Posting URL's is pointless. Most journals are only available on-line if
you have a subscription. If you do its easy enough to look them up, if
you don't then a URL won't help. But you can always go to a medical
library to look them up.

Quoted message said:

I presume the papers quoted sample sizes, and the respective time
intervals between the actual sampling and the last time in the saddle
?

Yes, read the papers.

Quoted message said:

Were they taken immediately after getting off the bike for instance?

Between 15mins and 3hrs after riding, depending on the study

Quoted message said:

Have there been any studies on such questions, do you know?

Since it is blood circulation, the levels will not drop rapidly after
stopping cycling so the timing is not particularly important other than
if the release is as a result of cycling it needs time to get into the
blood stream. Since some of the rides are up to 250 miles though its
unlikely that there will be significant change during the first hour or
so after stopping.

Quoted message said:

As you're clearly very familiar with the subject I'm sure you'll be
able to provide the comprehensive answers that would seem to be
required.

Worked for a number of years with some of the world leaders in the
treatment of prostate cancer and BPH.

Quoted message said:

It's maybe just as well nobody is likely to take your citations of
the earlier papers, regarding elevated PSA among cyclists on trust
then, isn't it ?

You don't have to take them on trust. Go and read the papers yourself.
That's how scientific citations work.

Quoted message said:

The question under consideration, is what proportion of male
cyclists, on autopsy at any age, are shown as having had prostate
cancer at 50, and at what stage, as compared with the general male
population at 50 as subsequently examined on autopsy.

Actually the question under consideration was your assertion "There is
some anecdotal evidence, that regularly riding a bike
more especially on a hard saddle (maybe) can elevate PSA readings
over the lower threshold."

However, at age 50 approx one third of males will have evidence of
prostate cancer cells and one half will have BPH. By age 80 its
virtually 100% for cancer and 80% for BPH. I am not aware of any
studies looking for an excess of prostate cancer in cyclists but it
would have to be a pretty massive study to show one given the above
prevalence.

Now do you have any evidence to support your suggestion that there is an
excess of prostate cancer in male cyclists or is it just speculation
based on some cyclists getting prostate cancer?

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

"Tony Raven" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

michael adams said:

Mere lists mean nothing and don't show anything.

No but the papers in the list do. You can always go an read them if you
want - that's how citations work.

Quoted message said:

The very fact that you seem to think its possible to "prove"
absolutely anything by posting a list of headings of Papers on a
NewsGroups - without even having the courtesy of providing any URL's
- only two of which appear to support your hypothesis in any case,
shows how much credence anyone can place in your understanding of
what the papers actually demonstrated. Or didn't as the case may be.

Only two?

Int J Sports Med. 2005 Jan-Feb;26(1):79-81.
"We hypothesize that neither a heavy and regular physical exercise nor
the extensive and prolonged mechanical involvement of the prostate
region by the bicycle riding have significant influence on release of
both PSA and fPSA."

....

No that's the hypothsesis. What they set out to study.

Where are the results?

Do you actually have any clue what you're talking about ?

....

Quoted message said:

Posting URL's is pointless.

No it isn't

I'd normally tinyurl them, but seeing as you can't even be bothered to
leave any links at all, I don;t think I'll bother.

....

arpa.allenpress.comarpaonlineOpen ↗

Effect of Marathon Running on Total and Free Serum Prostate-Specific
Antigen Concentrations

<quote>

In 1996, Oremek and Seiffert 19 and Safford and colleagues20 studied
the effects of bicycle riding on PSA levels. Both groups hypothesized
that use of a bicycle would directly stimulate the secretion of PSA
into the bloodstream. Oremek and Seiffert19 found an increase of PSA
concentrations by as much as 3-fold. The increase was age-dependent
and correlated with the PSA concentration before exercise; it was
evident in both the free and the complexed fractions of the molecule

</quote>

19. Oremek GM, Seiffert UB. Physical activity releases prostate-specific
antigen from the prostate gland into blood and increases serum PSA
concentrations. Clin Chem 1996;42:691-695. [PubMed Citation]

which is

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Retrieve&list_uids=8653893&dopt=Citation

<quote>

Clinical Chemistry Laboratories, Klinikum der Goethe-Universitat, Frankfurt
am Main, Germany.

Determination of prostate-specific antigen (PSA) is an established tool
in detecting prostate cancer. However, the effect of physical activity
on the PSA concentration in serum is controversial. We measured serum
concentrations of PSA and prostatic acid phosphatase (PAP) in 301 healthy
outpatients before and after they performed standardized exercise.
Immediately after 15 min of exercise on a bicycle ergometer, their
serum PSA concentrations increased by as much as threefold. The increase
was age dependent and correlated to the PSA concentration before exercise.
This increase was evident in both the free and complexed fractions of PSA.
The amount of PSA secreted into blood depends on the volume of the
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
prostate, whereas productivity of the prostate epithelium remains constant
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
or increases slightly with age. We present cutoff values for clinical use.
PAP was also increased, but to a lesser extent. The PSA and PAP secretion
mechanisms differ. Our data suggest that extensive physical activity
should be avoided before blood sampling for diagnostic purposes and,
in case of an increase, the PSA concentration should be controlled
after an exercise test.

<quote>

hint: the prostate grows larger as you get older.

Oh sorry, you knew that already.

And here's the NHS booklet conerning PSA screening -

which concens exercise in general prior to a screening.

http://www.cancerscreening.nhs.uk/prostate/prostate-booklet-text.pdf

3.1.2 PSA test practicalities

Before having a PSA test men should
NOT have:

exercised vigorously in the previous
48 hours

....

Or maybe the NHS don't have a clue either ? Whereas you clearly do.

Quoted message said:

Most journals are only available on-line if
you have a subscription. If you do its easy enough to look them up, if
you don't then a URL won't help. But you can always go to a medical
library to look them up.

....

Nonsense as demonstarted above

....

Quoted message said:

You don't have to take them on trust. Go and read the papers yourself.
That's how scientific citations work.

....

I just quoted one.

....

Quoted message said:

Worked for a number of years with some of the world leaders in the
treatment of prostate cancer and BPH.

....

So much so, that you can't even differentiate between a hypothesis
and the actual evidence presented - I quote

Quoted message said:

"We hypothesize that neither a heavy and regular physical exercise "

I am impressed!

So what did you do, polish their windscreens ?

....

Quoted message said:

Quoted message said:

The question under consideration, is what proportion of male
cyclists, on autopsy at any age, are shown as having had prostate
cancer at 50, and at what stage, as compared with the general male
population at 50 as subsequently examined on autopsy.

Actually the question under consideration was your assertion "There is
some anecdotal evidence, that regularly riding a bike
more especially on a hard saddle (maybe) can elevate PSA readings
over the lower threshold."

....

No it wasn't. I was citing the O.P's question about the relation
between prostate cancer and cycling. For which, as I pointed out
there is very little evidence.

The point being that in general cyclists are don't figure very highly
in experimental modelling. As they're not thought that significant
in statistical terms.

I did however produce some anecdotal evidence coupled with my
own personal experience, which again is supported by some studies
into the affect of exercise in general, and cycling in my own
particular case, immediately prior to giving a blood sample,
and the effect this may have on elevating PSA levels.

And I hope my own experience may be useful to other cyclists. And
their doctors. In not taking an isolated PSA reading, in the absence
of any other indicators as constituting a good reason for having a
biopsy before another PSA reading following midified behaviour.

That, if you could actually be bothered to read my first post, or
had the comprehension skills to understand what I wrote, was my
actual point.

Quite what your own precise motives for posting might be, can
only guessed at

....

Quoted message said:

However, at age 50 approx one third of males will have evidence of
prostate cancer cells and one half will have BPH. By age 80 its
virtually 100% for cancer and 80% for BPH. I am not aware of any
studies looking for an excess of prostate cancer in cyclists but it
would have to be a pretty massive study to show one given the above
prevalence.

....

Isn't the internet wonderful ?

Isn't it amazing what a person can learn in the space of just five
minutes!

You never know at this rate you might be performing brain surgery
by tomorrow.

....

Quoted message said:

Now do you have any evidence to support your suggestion that there is an
excess of prostate cancer in male cyclists or is it just speculation
based on some cyclists getting prostate cancer?

.....

I gave precise reasons in my last post as to why such speculation
is pointless.

I can only assume that you really are as stupid as you make out.

"michael adams" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

The question under consideration, is what proportion of male cyclists,
on autopsy at any age, are shown as having had prostate cancer at 50,
and at what stage, as compared with the general male population at 50
as subsequently examined on autopsy.

Quoted message said:

As cycling behaviour doesn't normally feature in medical records
except possibly in repect of injuries, the difficulties in compliling
such information shouldn't need too much explanation.

Maybe if you showed that passage to someone else, a grown-up perhaps
they could explain it all to you.

michael adams

....

Quoted message said:

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

Simon Brooke said:

in message <[email hidden]>,
dannyfrankszzz ([email hidden]'😉

Quoted message said:

Here's one for the paranoid but I recently heard that there might be a
link with prostrate cancer and cycling. Just wondered what the
consensus is on this and what people do to offset concerns over this.

I don't normally reply to Cycling Forums people, but this one seems
reasonable...

Badly designed bicycle saddles can cause damage to the plumbing in your
groin, leading to all sorts of nasty things like erectile disfunction
and, allegedly, an increased risk of prostate cancer. Women suffer
slightly different but equally unpleasant damage from poorly fitting
saddles.

Any medical evidence for this assumption?

Tony has tried to 'post' a few detailed replies to the original and my
posts only to be 'blasted' by others (all part of newsgroup life I
know, and there was me thinking they are a good place for helping each
other)

It would 'appear' that there is no link between long distance saddle
use and prostate cancer which is good enough for me at 55 this year. I
will still have a chat with my consultant mate though (only problem is
I know I will get detailed in depth video coverage of prostate
operations etc etc etc etc..... yuk)

Much Much more chance of being knocked off the bike and injured than
getting cancer.

Happy New Year everyone

"Jack Ouzzi" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Simon Brooke said:

in message <[email hidden]>,
dannyfrankszzz ([email hidden]'😉

Quoted message said:

Here's one for the paranoid but I recently heard that there might be a
link with prostrate cancer and cycling. Just wondered what the
consensus is on this and what people do to offset concerns over this.

I don't normally reply to Cycling Forums people, but this one seems
reasonable...

Badly designed bicycle saddles can cause damage to the plumbing in your
groin, leading to all sorts of nasty things like erectile disfunction
and, allegedly, an increased risk of prostate cancer. Women suffer
slightly different but equally unpleasant damage from poorly fitting
saddles.

Any medical evidence for this assumption?

Tony has tried to 'post' a few detailed replies to the original and my
posts only to be 'blasted' by others (all part of newsgroup life I
know, and there was me thinking they are a good place for helping each
other)

I posted about the possibilty that cycling to an appointment to
give a blood sample might lead to an elevated PSA reading leading to
an unecessary prosate biopsy.

If you've ever been subject to a totally innecessary prostate
biopsy. you might not be so eager to flout your own ignorance
in defence of your mate.

But I can see you prefer to wallow in your own stupidity.

So be it.

michael adams

....

Jack Ouzzi said:

Much Much more chance of being knocked off the bike and injured than
getting cancer.

Depends on your definition of injured. As about 1 in 4 people die of
cancer (and proportionately more as they get older, and cyclists tend
to live longer) For serious injuries, I'd reckon you'd be more likely
to get cancer.

Personally I find the obituaries column in Cycle morbidly comforting,
as the average age and faculty level of the deceased is very high.

...d

Jack Ouzzi said:

It would 'appear' that there is no link between long distance saddle
use and prostate cancer which is good enough for me at 55 this year.
I will still have a chat with my consultant mate though (only problem
is I know I will get detailed in depth video coverage of prostate
operations etc etc etc etc..... yuk)

Take you wellingtons and a waterproof pinney ;-) There is a link with
testicular cancer though:

"Coldman et al., in a case control study, investigated the relationship
between the risk of testis cancer and various sports activities among
133 men with testicular seminoma. After controlling for known risk
factors such as cryptorchidism and after stratification for age, they
found a significant increase in risk of testicular seminoma in men with
history of regular bicycling (odds ratio 1.99), horse riding (odds ratio
3.31) or both (odds ratio 4.56). They suggested that persistent
repetitive trauma to the scrotal contents, as well as contact exposure
to potential dyes and chemicals present in the leather saddles, may be
the underlying cause in the development of testicular cancer in riders
[53]. The relationship between exercise and the risk of testicular
cancer was also addressed by Forman et al., who found that the risk of
testicular cancer decreased with increased amount of exercise and
increased with increased sedentary [54]. Therefore, although cycling
per-se may be associated with increased risk of testicular cancer in a
direct mechanism, the protective effect of exercise against testicular
cancer may reduce this risk or cancel it completely [30]."
I. Leibovitch, Y. Mor, The Vicious Cycling: Bicycling Related Urogenital
Disorders.
European Urology, Volume 47, Issue 3, Pages 277-287

http://dx.doi.org/10.1016/j.eururo.2004.10.024 (to keep Mr Adams happy)

Quoted message said:

Much Much more chance of being knocked off the bike and injured than
getting cancer.

Actually the other way round but the risk of getting cancer as a
consequence of bike riding is pretty negligible

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

in message <[email hidden]>, Jack Ouzzi

(') said:

Simon Brooke said:

in message <[email hidden]>,
dannyfrankszzz ([email hidden]'😉

Quoted message said:

Here's one for the paranoid but I recently heard that there might be
a
link with prostrate cancer and cycling. Just wondered what the
consensus is on this and what people do to offset concerns over this.

I don't normally reply to Cycling Forums people, but this one seems
reasonable...

Badly designed bicycle saddles can cause damage to the plumbing in your
groin, leading to all sorts of nasty things like erectile disfunction
and, allegedly, an increased risk of prostate cancer. Women suffer
slightly different but equally unpleasant damage from poorly fitting
saddles.

Any medical evidence for this assumption?

As to erectile disfunction, I believe so, but I'm not an expert. I've
seen some positively horrible pictures of damage to the labia in women
caused by cycling, but again I don't know how common this is.

--
[email hidden] (Simon Brooke) http://www.jasmine.org.uk/~simon/

;; Madness takes its toll. Please have exact change.

Simon Brooke said:

As to erectile disfunction, I believe so, but I'm not an expert. I've
seen some positively horrible pictures of damage to the labia in women
caused by cycling, but again I don't know how common this is.

http://bmj.bmjjournals.com/cgi/content/full/325/7356/138

See also Bicyclist's nipples
B. Powell JAMA. 1983;249:2457.

--
Tony

"The best way I know of to win an argument is to start by being in the
right."
- Lord Hailsham

On Mon, 02 Jan 2006 15:17:39 +0000, Tony Raven <[email hidden]>

Quoted message said:

See also Bicyclist's nipples

Hey now when I started cycling these were for putting grease into with
a little grease gun ;-)

michael adams said:

Quoted message said:

Tony has tried to 'post' a few detailed replies to the original and my
posts only to be 'blasted' by others (all part of newsgroup life I
know, and there was me thinking they are a good place for helping each
other)

I posted about the possibilty that cycling to an appointment to
give a blood sample might lead to an elevated PSA reading leading to
an unecessary prosate biopsy.

If you've ever been subject to a totally innecessary prostate
biopsy. you might not be so eager to flout your own ignorance
in defence of your mate.

But I can see you prefer to wallow in your own stupidity.

So be it.

michael adams

Yep I was right, this is not the place for helping each other.