in case of homologous doping method:
* the athlete may contract blood borne diseases, * transfusion reactions may develop, * he/she may develop increased transfusion sensitivity.
In case of autologous doping method:
* the athlete showa decrease in efficacy of training when blood is drawn out.
On psychological level
Blood doping increases the amount of red blood cells. This means that more oxygen can be carried around in the bloodstream and because of this increase of oxygen the muscles can work for longer and people who use blood doping can train for longer.
June 17, 1985 The United States Olympic Committee unanimously passed a resolution outlawing the practice of ''blood doping.'' http://www.nytimes.com/1985/06/17/sports/blood-doping-is-banned.html
Distance running has been notorious for its epo blood doping scandals in recent years.
Some negative side effects of having low blood pressure are dizziness, vomiting, and others.
The meaning of blood doping is the art of increasing red blood cells in the bloodstream. This practice enhances athletic performance. It improves an athlete's aerobic capacity and endurance.
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They will have a better oxygen transport in their blood, this is why endurance athletes use doping substances or high altitude training to increase their hemoglobin levels. The drawback of a high hemoglobin level is that your blood is more likely to form thrombosis and cause stroke or heart attacks.
Actually, no. And this used to be a common thing among athletes. They used to do what is known as "blood doping". They take out red blood cells, store them for a while (meanwhile your body has already made up for the lost red blood cells) and then inject it back to their body. They do this because it gives them more stamina. But as a result, your blood pressure increases, and your heart has to do a lot of work to pump all of that blood, so eventually you get a stroke and die. The athletes used to drop dead mid-race.
If you're talking about a full blood transfusion for medical purposes, probably, assuming the event officials are notified prior to the event and give their consent. On the other hand, if you're talking about blood doping, the infusion of additional red blood cells which carry oxygen to the muscles, then no, this was outlawed for athletes in 1986.