[Doping with illegal and legal substances in old age].

The number of old persons who participate in sports and can even achieve peak performances is increasing steadily. Normal aging, however, is associated with decreased muscle strength and a decline in cardiovascular endurance even in those persons who regularly participate in sports. Thus, it seems obvious to impact on muscle mass and muscle strength by using anabolic substances. The number of older persons who illegally use doping substances is currently unknown. Besides classical anabolic drugs, other proteins and amino acids are used to impact on muscle mass or strength. This article provides some insights into clinical trials of classical anabolic drugs in older persons and gives an overview on more recent studies examining the potential effects of taurine, creatine and whey protein in older persons.