HypErthermia as an Additional Treatment for the Biology and Experience of Depression: Study 2

Cognitive Behavioral Therapy (CBT) is a behavioral (psychotherapeutic) intervention for major depressive disorder (MDD). A highly trained masters' or PhD-level clinician will administer 8 weekly CBT sessions (\~50 minutes each), following the standard cognitive behavioral therapy for depression protocol.

Active whole-body hyperthermia (active WBH) will be administered by trained research assistants. Preparation for the active WBH session, the active WBH session, and cool down will last 3.5 hours, with heating lasting approximately 90-100 minutes (and no longer than 140 minutes). The treatment will take place in an infrared sauna dome, and the active heating phase will last until the participants has achieved a core (rectal) temperature of 38.5 C.

Sham whole-body hyperthermia (sham WBH) will be administered by trained research assistants. Preparation for the sham WBH session, the sham WBH session, and cool down will last 3.5 hours, with heating lasting approximately 90-100 minutes (and no longer than 140 minutes). The treatment will take place in an infrared sauna dome, and the sham WBH session will minimally impact core body temperature.