Nordic Winter Sports, Biological Passport (ABP) and the Legal Challenges
نویسنده
چکیده
Why do athletes blood dope? From a physiological point of view we need to consider which factors limit the endurance exercise capacity. During whole body endurance exercise, performance is limited by the amount of oxygen delivered to the working muscles. The oxygen delivered, is a function of the capacity of the heart to pump blood out into the systemic circulation (cardiac output) and the amount of oxygen in the blood leaving the heart, the arterial blood. Oxygen in the arterial blood is mainly chemically bound to hemoglobin, a molecule contained in the red blood cell, the erythrocyte. The hemoglobin concentration in the blood depends on the total amount of hemoglobin relative to the liquid part of the blood, the blood plasma. An increase in the hemoglobin concentration results in an increase in the amount of oxygen delivered to the working muscles. As long as sufficient amounts of oxygen are available to the muscles, the accumulation of fatigue-inducing metabolites will be postponed.
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