On Tue, 06 Sep 2005 20:27:00 +0200, Ewoud Dronkert
<
[email protected]> wrote:
>Marlene Blanshay wrote:
>> It looks like some kind of old injury....
>
>http://grahamwatson.com/gw/imagedocs.nsf/photos/04tourSt18-011000
>http://groups.google.com/groups?q=hincapie+varicose+group:rec.bicycles.racing
Some nationalities seem to report higher than normal development of
varicosity, so there's a genetic component.
Hypothetically, couple genetic predisposition, use of somatotrophic
substances, presence of blood thickened due to hypoxic training, or oxygen
vector substances, it's not hard to imagine overdevelopment of superficial
saphenous veins as the body's response to stress on the system.
The kind of veins you see on cyclists may not be varicosities in the
classical sense, where the venous walls and valves have lost their
function. Quite the contrary, additional valve development and hypertrophy
of the vein itself would be an attempt at an adaptive mechanism to move the
thickened blood back to the heart.
I'd imagine that if this vein was nonfunctional it would have been
considered a candidate for the various treatments, including laser surgery,
or surgical reduction. After the cyclist's career is completed, it would be
a simple matter to resect the vein to a normal length even if for cosmetic
reasons. The saphenous vein is often used as a donor for heart surgeries.
Just some wild conjecture, fwiw. ;-)
jj