World Championships are going on and doping still appears to be used in cross-country skiing. The reason why some athletes do that is that in addition to cardiac stroke volume, which is the most important factor in cross-country skiing, also red blood cell volume contribute to systemic oxygen delivery, which is the most important factor determining maximal oxygen consumption and thus endurance exercise performance. By using EPO or your stored blood, some athletes try to increase their blood oxygen carrying capacity, and by so doing their performance.
People were commented to be very stupid to dope on their home ground, which makes me smile when reflecting back to Lahti 2001. There numerous Finnish skiers were investigated to have used blood doping and were banned to take part in further competitions. Also after that we have had Finnish and other skiers that have used EPO and other drugs, no matter what has happened.
It is striking that these doping habits still continue. Obsession to win is overwhelming.