Demographics and post-study questionnaire
During the Week-1 visit, participants completed questionnaires including basic demographics, clinical history including medications.After the Week-7 post-intervention scan, participants completed a questionnaire surveying their experience during the study. They provided self-ratings of difficulty of daily heart rate biofeedback training, level of effort to complete the training, expectations of the training impact on well-being, and likelihood of continuing the training after the study’s conclusion.