Hemoglobin/Russians file figure-skating protest
milztoday
absinthe at mad.scientist.com
Fri Feb 22 17:33:36 UTC 2002
First the Russians...http://sports.espn.go.com/oly/winter02/gen/news?
id=1338505. They're saying that Slutskaya should get her own medal
like the Canadians due to biased judging (eventhough she didn't do a
triple-triple combo and made it a triple-double and eventhough she
didn't land one of her triples soundly.)
Now, onto hemoglobin.
It's the oxygen carrying component in red blood cells. Oxygen is
needed by the body to function. There's a bunch of biochemical
reactions that use oxygen to convert energy for the body.
There are established normal ranges of hemoglobin for human,
depending on sex and even racial make-up. There are also set methods
to measure hemoglobin. But with anything in science/medicine, there
are variations of the normal ranges due to laboratory technique and
the instruments used. To avoid these technical differences, tests
like these only one reference laboratory is used. I suspect the IOC
has a set range of "normal" hemoglobin for athletes, male and female.
Medically, there are a variety of reasons for increased hemoglobin,
ranging from medical conditions to environmental stressors such as
vigorous exercise and high altitude or blood doping.
Hemoglobin is increased in high altitudes because the concentration
of oxygen in high altitudes is lower than the concentration of oxygen
in lower altitudes. Because the oxygen concentration is lower, the
body needs to produce more hemoglobin in order to trap that oxygen.
Vigorous exercise basically does the same thing. In order for the
body to meet the oxygen demands of vigorous exercise, it needs to
increase it's amount of hemoglobin.
So what is blood doping? In it's most basic, primative form, blood
doping can be done by transfusing red blood cells into an athlete
before an event. The more high tech way to blood dope is to give an
injection of erythropoetin, which is a chemical that stimulates the
body to produce red blood cells. This chemical is found naturally in
the body and is also manufactured for use by people with anemia. The
theory behing blood doping is that by increasing the amount of oxygen-
carrying cells, you can deliver more oxygen to the muscles, so you
can increase performance.
So, could a person living in a high altitude normally develop an
increase in hemoglobin? Yes. However, it would take a while to build
up that amount of hemoglobin. After a transfusion or after a dose of
erythropoetin, there is an almost immediate increase in red blood
cells. It's quite remarkable.
The other thing too and I don't know if the IOC does this is to take
several samples of blood at different days before an event, like 120
days, 10 days and 1 day. If there's a difference in the numbers then
something probably happened.
Milz
More information about the HPFGU-OTChatter
archive