According to the precepts of anthroposophic medicine, a human has four aspects which need to be treated: spirit, soul, life and matter. Eurythmy is one of the practices said to act on the "life" aspect, and is claimed to effect an "improvement of health related life functions". A person receiving eurthymy therapy moves under the guidance of a eurythmy therapist, who will have been trained two years beyond the four-year fundamental course in eurythmy. The movements may be adapted to the condition of the person being treated; for example, they may be done while either sitting or even lying down. Therapeutic eurythmy is claimed to bring about a "re-integration of body, soul, and spirit."