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Politics : PRESIDENT GEORGE W. BUSH -- Ignore unavailable to you. Want to Upgrade?

To: bentway who wrote (594988)	7/25/2004 12:13:13 PM
From: steve harris	Read Replies (1) \| Respond to of 769667

Any Sunday talk shows discussing Kerry's Bergergate today?

To: bentway who wrote (594988)	7/25/2004 12:19:17 PM
From: TideGlider	Respond to of 769667

"doping" as referenced in long distance cycling ,running or other lon, endurnce driven sports is not the taking of steroids, testosterone or other enhancing drugs. It is the increase in blood cells, by taking them over a period of time and reintroucing them to the system. It allows for better oxygen carrying by the "doper" Here is an example: 1-4 units of an athlete's blood are removed over a 3-8 week period and stored in a freezer. These stored blood cells are then re-infused to the athlete (autologous transfusion) 1-7 days before the event. This procedure produces an increase of up to 20% in red blood cells and haemoglobin, which remains elevated for about two weeks. The increased haemoglobin level produces an increase in the oxygen carrying capability of the athlete's circulatory system. More recently, some endurance athletes have taken to intravenous injection of recombinant erythropoietin (EPO) to get similar effects to the blood doping method mentioned above. Human erythropoietin is produced naturally by the kidneys. The kidneys release an enzyme - erythrogenin - that transforms plasma globulin to erythropoietin, under conditions of hypoxia (for this reason exposure to altitude has a similar physiological effect). Erythropoietin is a glycoprotein which stimulates erythropoiesis in bone marrow and raises the level of circulating haemoglobin. This has been shown to increase aerobic power (Ekblom and Berglund, 1991) and thus endurance performance. Casoni et al (1993) also demonstrated an increase in the levels of circulating red blood cells and haematocrit. I think Armstrong is in a unique position in regard to doping. He had testicular cancer. He's probably taking medically required testosterone, a steroid. It would be difficult to attack him for that, or to question his dosages. I think it's great that he won for a sixth time, although I disagree with his misguided support of the Bush administration, and I wonder if it's tied to his support from the Postal Service.