In many countries anabolic agents like cathinones are successfully used to increase the rate of growth of cattle. Cathinones belong to the group of wake-up amines. A prominent example is 3MMC, which has recently appeared on the market in increasing quantities. The intake of wake-up amines is considered doping and causes an improvement of the coordinative abilities during sportive stress. The cathinones cause a stimulation of the central nervous system (CNS). This leads to an improvement in the interaction between the CNS and the muscles. Especially in states of fatigue, wake-up amines have a performance-enhancing effect. The fatigue-induced decline in performance can thus be counteracted by wake-up amines. This is why wake-up amines are used in endurance sports.