Inclusion Criteria:  To be diagnosed with clinical depression by a psychiatrist according to The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) criteria Volunteering to participate in the study  Exclusion Criteria:  Fever over 38.5 Acute injury or infection Rib fracture Cardiac arrhythmia Using drugs that affect cortisol levels (oral contraceptives, hormonal drugs, antidepressants, antipsychotics etc.) Being pregnant, premenstrual or in the menstrual period for female participants