🩸 What Is Blood Doping?
Blood doping is a prohibited method that artificially increases the number of red blood cells (erythrocytes) in the blood to improve oxygen transport and endurance performance. WADA (the World Anti-Doping Agency) classifies blood doping as a prohibited method in category M1. There are two main types: autologous transfusion (transfusion of one's own blood) and homologous transfusion (transfusion of donor blood).
🔬 Types of Blood Doping
🧬 Autologous Transfusion
The athlete donates their own blood (usually 1-2 units, ~450-900 ml) several weeks before competition. The body restores the lost erythrocytes. Before competition, the blood is transfused back — hemoglobin and hematocrit increase. This is the most difficult method to detect.
🩸 Homologous Transfusion
Donor (another person's) blood is used. A faster method that does not require prior donation. It is easier to detect due to mismatched blood group antigens.
💉 Erythropoietin (EPO)
A hormone that stimulates erythrocyte production in the bone marrow. Although technically not blood doping, EPO achieves the same goal — increased oxygen transport.
📊 Physiological Effect on Performance
The increase in hemoglobin and hematocrit caused by blood doping or EPO directly increases maximal oxygen uptake (VO2max). An additional 100-150 ml O2 per minute can be transported to the muscles. This means a 5-10% increase in VO2max — the difference between 4th and 1st place at the elite level.
| Parameter | Normal Values | After Doping | Effect on Performance |
|---|---|---|---|
| Hemoglobin (Hb) | 14-16 g/dL (men) | 17-19+ g/dL | +8-15% VO2max |
| Hematocrit (Hct) | 40-48% | 50-55%+ | Higher blood viscosity, thrombosis risk >55% |
| Erythrocyte Volume | ~2.5 L | +150-300 ml | +5-10% endurance capacity |
| VO2max | Individual | +5-10% | Improvement equivalent to several years of training |
⚠️ Risks and Side Effects
- Thrombosis Risk: Increased blood viscosity (especially when Hct >55%) increases the risk of blood clots, stroke, and heart attack — especially at night, when heart rate slows.
- Infections: Use of non-sterile needles can cause hepatitis, HIV. Homologous transfusions pose an additional risk of immune reaction.
- Blood Volume Overload: An excessive volume of transfused blood can cause heart failure and pulmonary edema.
- Autoimmune Reactions: The body may begin attacking its own or donor erythrocytes.
🔍 Detection and Biological Passport
The modern anti-doping system relies not only on direct detection of prohibited substances but also on the "Athlete Biological Passport" (ABP). The ABP tracks an athlete's blood parameters over time and looks for unusual deviations: a sharp drop in hemoglobin (after blood donation), followed by a sharp increase (after transfusion). This is a more effective method than one-time tests because it detects not the substance itself but its physiological effect.
🙋 Frequently Asked Questions
Yes! Understanding blood doping helps you train more effectively, avoid injuries, and achieve better results even at the amateur level.
We recommend PubMed, Google Scholar, and Sports Medicine journals. It is also worth following publications from the Lithuanian Sports University.
It depends on the specific study. Some methods require laboratory equipment, while others can be performed with portable devices.
Coaches who understand blood doping can individualize training programs, monitor progress, and adjust workloads in a timely manner.
📚 Additional Resources and Sources
To deepen your knowledge about blood doping, we recommend:
- Scientific publications and conferences of the Lithuanian Sports University (LSU)
- International journals: Journal of Sports Sciences, Medicine and Science in Sports and Exercise
- Annual congresses of the European College of Sport Science (ECSS)
- Sports science podcasts: Science of Sport, The Real Science of Sport
- Sports science programs of the Lithuanian National Olympic Committee (LTOK)
⚡ Pro Tip
Sports science is constantly evolving. What was considered true 10 years ago may be refuted today by new research. Be curious, read the latest literature, and don't be afraid to experiment — of course, while following safety principles.