Comparing the Efficacy of Heated Yoga and Sauna as a Treatment for Depression

Prior treatment

• Under the influence or withdrawal of drugs or alcohol
• Positive urine toxicology screen due to illicit drug use or other exclusionary medications. (Potential false positives will be addressed on a case-by-case basis at the discretion of the PI or designee)
• have had a bone fracture or joint surgery in the past 6 months
• are on medications that make dehydration more likely (e.g., lithium, antipsychotics, insulin-dependent) diuretics, barbiturates, b-blockers, anticholinergics, current ETOH acute intoxication, reduced ability to sweat, hemophilia, pacemaker (magnets used to assemble saunas can interrupt the pacer)
• antidepressant or psychiatric medications that are initiated less than 8 weeks or a dose change less than 4 weeks prior to screening visit
• are currently in active ketamine, Electroconvulsive therapy, or Transcranial Magnetic Stimulation treatments

Other illness

• Active eating disorders or substance use disorders within the past 12 months, as per the MINI
• History of bipolar disorder, psychotic disorders, as per the MINI
• any serious, unstable medical condition as determined by the revised Physical Activity Readiness Questionnaire (PAR-Q+) and do not have approval from their treating physician (we will check in with treating physician in the event that participants endorse any item on the PAR-Q+)
• psychiatric hospitalization within the past year
• diagnosed with any neurological disorders that would impact participation or make participation unsafe

Other

• Pregnant or planning to become pregnant
• Breast feeding
• Active suicidal thinking (i.e., PHQ-9 item 9 ≥1 and a positive response to C-SSRS screener items 3, 4, 5, or 6)
• Primary OCD or PTSD, as per the MINI
• ≥25% drop in PHQ-9 score from screen to baseline
• not able to walk freely or without difficulty
• participants must have a healthcare provider who they could contact if they needed medical care, such as a primary care doctor, a counselor, a psychiatrist, a nurse practitioner, or a clinic that you go to.
• Significant exposure to heated yoga classes in the past 3 months (i.e., more than 6 classes)
• Significant exposure to sauna sessions in the past 3 months (i.e., more than 6 sessions)
• Significant exposure to mindfulness app in the past 3 months (i.e., more than 6 uses of the app)
• psychotherapy that has been initiated within the past 3 months
• are unable to follow the study procedures (e.g., not able to travel to the heated yoga or sauna studios)
• A subject who in the opinion of the Principal Investigator would not be able to safely complete the study or would jeopardize study integrity

• adults (18-65 years old)
• Ability to provide informed consent
• English language proficiency
• PHQ-9 score \> 10, indicating at least moderate depressive symptoms 21
• Must have filled out the waiver for the community-based partners prior to enrolling in the study\*
• Individuals of childbearing potential must use an acceptable form of birth control
• (if applicable) willingness to keep psychiatric medications and psychotherapy stable throughout the course of the study
• Must be able to access mindfulness app on a device (i.e., smartphone, iPad, etc.)
• Can travel to Breathe in Harvard Square and at least one Restore location (i.e., Hingham, Somerville, Dedham, Newton, Lynnfield)

Criteria the registry did not label

• Subject Characteristics