Information on the continuing training behaviour of adults in Germany has been available since the “Continuing Training Behaviour” study of 1979. This enables changes in continuing training participation to be tracked over a period of four decades. The latest survey, the 2018 Adult Education Survey (AES) shows that the trend towards assimilation of continuing training behaviour in East and West Germany has been reversed for the first time. Whereas the rate has risen significantly in the West, levels in the East are stagnating. The article explores possible explanations.