One particularly helpful and effective form of therapy is Cognitive Behavioral Therapy (CBT). Techniques used may include those based upon the concept that intentional exposure to the symptoms will help decrease the sufferer's fear of panic attacks (Symptom Induction). Symptom induction is in essence a form of systematic desensitization. That is, it intends to desensitize the afflicted from the symptoms of panic attacks. The therapist and patient discuss the nature of their attacks, and the symptoms which they fear most. The CBT typically consists of several sessions in which these symptoms are intentionally induced until the patient is less fearful. Inductions generally occur for one minute and may include: intentional hyperventilation, spinning in a chair, straw breathing, breath holding, head lifting, or running in place etc. The key to the induction is that the exercises should mimic the most frightening symptoms of a panic attack