The relationship between premenstrual syndrome and physical exercise was studied with the aid of questionnaires in a series of 748 female university students. Girls who practised sports showed less symptoms of central nervous tension, particularly headache. Menstrual dys‐mennrrhoea also was less frequent in the athletes than in the control group. On the other hand no correlation was observed between premenstrual dysmenorrhoea, oedema and the practice of sports. Gymnastics had practically no effect on the various premenstrual or menstrual symptoms. The favourable influence of sports is attributed mainly to an improved circulatory capacity.