Abstract des Autors

Today we can synthesize and manufacture all known nutrients: in theory many of these substances possess ergogenic potential when taken in quantities normally not found in foodstuffs. Recently, creatine has been marked as an ergogenic nutraceutical drug because after a 5 day period of supplementation (20 g/day per 5 days) the mass of skeletal muscles are increased and the performance of intermittent high intensity exercise enhanced, especially in sedentary untrained subjects. The scientific data available on highly trained athletes indicates that this population does not benefit from creatine supplementation. The widespread use of creatine to improve competition performance does not seem to be justified und several questions regarding its use must be posed. In biological systems, creatine in excess undergoes condensation with sugar derivatives to form heterocyclic, carciogenic amines. In a recent study supplementation of creatine tended to enhance the growths of Ehrlich ascite tumor cells. The use of creatine goes against current doping regulations because the International Olympic Committee (IOC) on doping legislation states that any physiological substance taken in abnormal quantities with the intention of artificially and unfairly increasing performance should be considered doping and violating the ethics of sport. In view of this rule athletes should consider the legal and ethical position underlying the nutraceutical use of creatine. The cancer risk related to abuse of this substance is too great to be taken lightly to have an unfair ridiculously low advantage of others in sports competition. Athletes in this way pay too much for penny whistle. Verf.-Referat