William Pullen is a psychotherapist registered with the British Association for Counselling and Psychotherapy (BACP). He practices Integrative therapy and specializes in the treatment of depression, anxiety, problems of self-esteem and confidence, and substance abuse. He has been featured in publications such as Vogue, The New York Times, and GQ. His interactive and instructive new book, Running with Mindfulness: Dynamic Running Therapy (DRT) to Improve Low Mood, Anxiety, Stress, and Depression (Plume), works with the reader to encourage a sense of confidence while practicing DRT and tackling tough emotional issues. Learn more at dynamicrunningtherapy.com.