In this presentation I will present an overview of the research on Holotropic Breathwork that I´ve been conducting during the last ten years, between 2007 and 2016. I will present the different studies that I´ve been conducting and the main results of each of them, including: 1) two studies with similar methodologies exploring the effects of Holotropic Breathwork (HB) on levels of distress, meaning of life, death anxiety and personal orientation in the context of a weeklong workshop, using a pre-post test design with three follow ups; 2) a study exploring the subjective effects of Holotropic Breathwork in different contexts (including daylong, weekend and weeklong workshops), specifically looking to the occurrence of mystical experiences, using the States of Consciousness Questionnaire (SCQ); 3) a study comparing the subjective effects of Holotropic Breathwork and different psychedelics, specifically looking to the occurrence of mystical experiences, using the States of Consciousness Questionnaire (SCQ). I will also discuss the state of the art of the holotropic breathwork research, and the areas of potential interest that might be examined in the future. Psychologist, researcher and writer, he holds a degree in Psychology from the University of Deusto and in Anthropology from the UAB. He obtained his PhD at the UAB with his dissertation “Complexity and Transpersonal Psychology: chaos, self-organization and peak experiences in psychotherapy”, exploring the short and medium term effects and the subjective effects of different breathwork techniques, including Holotropic Breathwork. He has been trained in Gestalt Therapy, Integrative Bodywork Therapy, Holotropic Breathwork and Transpersonal Psychology. He has been visiting scholar at the California Institute of Integral Studies (CIIS), member of the psychedelic emergency service at Boom Festival and other festivals since in 2008, and has teaching experience in the field of transpersonal psychology. He works as a psychotherapist in Barcelona, organize breathwork workshops and transpersonal psychology seminars and courses. He is also Assistant Editor of the Journal of Transpersonal Resarch (JTR), and a founding member of the Ibero-american Transpersonal Association (ATI). He recently published is first book “Psychedelic psychotherapy and research: past, present and future”.