 Professionals will be invited to the research project through an introductory lecture that lasts an hour. In the lecture the components of evidence based Mindfulness interventions will be included, followed by the presentation of research. Interested volunteers will be instructed about the purposes and procedures of the research, as well as on the existence of two groups, one that receive the Mindfulness intervention immediately, and other that will remain on the waiting list, with the possibility of receiving Mindfulness training after the end of the study. After clarification, those who agree to participate in the research will sign the Consent Form CF. After signing the consent form, volunteers will be evaluated by a clinical interview, to verify eligibility according to inclusion and exclusion criteria described above. Eligible to participate in the study will receive, in the same clinical evaluation , the first battery of questionnaires, consisting in the application of SRQ - 20 and SRQ-A . Participants who have the SRQ - 20 7 or SRQ - A 1 will be interviewed using the SCID DSM-IV, which is a structured diagnostic psychiatric interview. The 24-hour urine collect for measurement of sulphatoxymelatonin, and use of actigraph which will record the sleepwake cycle, as well as the incidence of light will also occur at this time. 