In menses, the stomach electrodes can lead to an increase in bleeding of the uterus. In individual cases this leads to an intensification of the menstrual period. However, we do not see menstruation as a contraindication for EMS training. Nevertheless, the trainee should be aware of this and make their own decision on whether to carry out training that particular week. But many female trainees do not miss their regular EMS training. The endorphins released during training simply make you too happy!